79 files changed, 3184 insertions, 0 deletions
diff --git a/integration-tests/build.gradle.kts b/integration-tests/build.gradle.kts
new file mode 100644
index 00000000..fb987c36
--- /dev/null
+++ b/integration-tests/build.gradle.kts
@@ -0,0 +1,43 @@
+subprojects {
+    sourceSets {
+        create("integrationTest") {
+            compileClasspath += sourceSets.main.get().output
+            runtimeClasspath += sourceSets.main.get().output
+        }
+    }
+
+    configurations.getByName("integrationTestImplementation") {
+        extendsFrom(configurations.implementation.get())
+    }
+
+    configurations.getByName("integrationTestRuntimeOnly") {
+        extendsFrom(configurations.runtimeOnly.get())
+    }
+
+    dependencies {
+        implementation(project(":integration-tests"))
+    }
+
+    val integrationTest by tasks.register<Test>("integrationTest") {
+        maxHeapSize = "2G"
+        description = "Runs integration tests."
+        group = "verification"
+
+        testClassesDirs = sourceSets["integrationTest"].output.classesDirs
+        classpath = sourceSets["integrationTest"].runtimeClasspath
+
+        useJUnit()
+    }
+
+    tasks.check {
+        dependsOn(integrationTest)
+    }
+}
+
+dependencies {
+    implementation(kotlin("stdlib"))
+    implementation(kotlin("test-junit"))
+    val coroutines_version: String by project
+    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutines_version")
+    implementation("org.jsoup:jsoup:1.12.1")
+}
diff --git a/integration-tests/cli/build.gradle.kts b/integration-tests/cli/build.gradle.kts
new file mode 100644
index 00000000..d9961f8f
--- /dev/null
+++ b/integration-tests/cli/build.gradle.kts
@@ -0,0 +1,41 @@
+import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
+
+
+plugins {
+    id("com.github.johnrengelman.shadow")
+}
+
+val dokka_version: String by project
+evaluationDependsOn(":runners:cli")
+evaluationDependsOn(":plugins:base")
+
+dependencies {
+    implementation(kotlin("stdlib"))
+    implementation(kotlin("test-junit"))
+}
+
+/* Create a fat base plugin jar for cli tests */
+val basePluginShadow: Configuration by configurations.creating {
+    attributes {
+        attribute(Usage.USAGE_ATTRIBUTE, project.objects.named(Usage::class.java, "java-runtime"))
+    }
+}
+
+dependencies {
+    basePluginShadow(project(":plugins:base"))
+}
+val basePluginShadowJar by tasks.register("basePluginShadowJar", ShadowJar::class) {
+    configurations = listOf(basePluginShadow)
+    archiveFileName.set("fat-base-plugin-$dokka_version.jar")
+    archiveClassifier.set("")
+}
+
+tasks.integrationTest {
+    inputs.dir(file("projects"))
+    val cliJar = tasks.getByPath(":runners:cli:shadowJar") as ShadowJar
+    environment("CLI_JAR_PATH", cliJar.archiveFile.get())
+    environment("BASE_PLUGIN_JAR_PATH", basePluginShadowJar.archiveFile.get())
+    dependsOn(cliJar)
+    dependsOn(basePluginShadowJar)
+}
+
diff --git a/integration-tests/cli/projects/it-cli/src/main/java/it/basic/java/SampleJavaClass.java b/integration-tests/cli/projects/it-cli/src/main/java/it/basic/java/SampleJavaClass.java
new file mode 100644
index 00000000..23b0202c
--- /dev/null
+++ b/integration-tests/cli/projects/it-cli/src/main/java/it/basic/java/SampleJavaClass.java
@@ -0,0 +1,17 @@
+package it.basic.java;
+
+import it.basic.PublicClass;
+
+/**
+ * This class is, unlike {@link PublicClass}, written in Java
+ */
+@SuppressWarnings("unused")
+public class SampleJavaClass {
+
+    /**
+     * @return Empty instance of {@link PublicClass}
+     */
+    public PublicClass publicDocumentedFunction() {
+        return new PublicClass();
+    }
+}
diff --git a/integration-tests/cli/projects/it-cli/src/main/kotlin/it/basic/PublicClass.kt b/integration-tests/cli/projects/it-cli/src/main/kotlin/it/basic/PublicClass.kt
new file mode 100644
index 00000000..71bc7e63
--- /dev/null
+++ b/integration-tests/cli/projects/it-cli/src/main/kotlin/it/basic/PublicClass.kt
@@ -0,0 +1,48 @@
+@file:Suppress("unused")
+
+package it.basic
+
+class PublicClass {
+    /**
+     * This function is public and documented
+     */
+    fun publicDocumentedFunction(): String = ""
+
+    fun publicUndocumentedFunction(): String = ""
+
+    /**
+     * This function is internal and documented
+     */
+    internal fun internalDocumentedFunction(): String = ""
+
+    internal fun internalUndocumentedFunction(): String = ""
+
+    /**
+     * This function is private and documented
+     */
+    private fun privateDocumentedFunction(): String = ""
+
+    private fun privateUndocumentedFunction(): String = ""
+
+
+    /**
+     * This property is public and documented
+     */
+    val publicDocumentedProperty: Int = 0
+
+    val publicUndocumentedProperty: Int = 0
+
+    /**
+     * This property internal and documented
+     */
+    val internalDocumentedProperty: Int = 0
+
+    val internalUndocumentedProperty: Int = 0
+
+    /**
+     * This property private and documented
+     */
+    private val privateDocumentedProperty: Int = 0
+
+    private val privateUndocumentedProperty: Int = 0
+}
diff --git a/integration-tests/cli/src/integrationTest/kotlin/org/jetbrains/dokka/it/cli/CliIntegrationTest.kt b/integration-tests/cli/src/integrationTest/kotlin/org/jetbrains/dokka/it/cli/CliIntegrationTest.kt
new file mode 100644
index 00000000..cfa752d6
--- /dev/null
+++ b/integration-tests/cli/src/integrationTest/kotlin/org/jetbrains/dokka/it/cli/CliIntegrationTest.kt
@@ -0,0 +1,89 @@
+package org.jetbrains.dokka.it.cli
+
+import org.jetbrains.dokka.it.awaitProcessResult
+import java.io.File
+import kotlin.test.BeforeTest
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertTrue
+
+class CliIntegrationTest : AbstractCliIntegrationTest() {
+
+    @BeforeTest
+    fun copyProject() {
+        val templateProjectDir = File("projects", "it-cli")
+        templateProjectDir.copyRecursively(projectDir)
+    }
+
+    @Test
+    fun runHelp() {
+        val process = ProcessBuilder("java", "-jar", cliJarFile.path, "-h")
+            .redirectErrorStream(true)
+            .start()
+
+        val result = process.awaitProcessResult()
+        assertEquals(0, result.exitCode, "Expected exitCode 0 (Success)")
+        assertTrue("Usage: " in result.output)
+    }
+
+    @Test
+    fun runCli() {
+        val dokkaOutputDir = File(projectDir, "output")
+        assertTrue(dokkaOutputDir.mkdirs())
+        val process = ProcessBuilder(
+            "java", "-jar", cliJarFile.path,
+            "-outputDir", dokkaOutputDir.path,
+            "-pluginsClasspath", basePluginJarFile.path,
+            "-sourceSet",
+            buildString {
+                append(" -moduleName it-cli")
+                append(" -moduleDisplayName CLI-Example")
+                append(" -sourceSetName cliMain")
+                append(" -src ${File(projectDir, "src").path}")
+                append(" -jdkVersion 8")
+                append(" -analysisPlatform jvm")
+                append(" -reportUndocumented")
+                append(" -skipDeprecated")
+            }
+        )
+            .redirectErrorStream(true)
+            .start()
+
+        val result = process.awaitProcessResult()
+        assertEquals(0, result.exitCode, "Expected exitCode 0 (Success)")
+
+        val extensionLoadedRegex = Regex("""Extension: org\.jetbrains\.dokka\.base\.DokkaBase""")
+        val amountOfExtensionsLoaded = extensionLoadedRegex.findAll(result.output).count()
+
+        assertTrue(
+            amountOfExtensionsLoaded > 10,
+            "Expected more than 10 extensions being present (found $amountOfExtensionsLoaded)"
+        )
+
+        val undocumentedReportRegex = Regex("""Undocumented:""")
+        val amountOfUndocumentedReports = undocumentedReportRegex.findAll(result.output).count()
+        assertTrue(
+            amountOfUndocumentedReports > 0,
+            "Expected at least one report of undocumented code (found $amountOfUndocumentedReports)"
+        )
+
+        assertTrue(dokkaOutputDir.isDirectory, "Missing dokka output directory")
+
+        val imagesDir = File(dokkaOutputDir, "images")
+        assertTrue(imagesDir.isDirectory, "Missing images directory")
+
+        val scriptsDir = File(dokkaOutputDir, "scripts")
+        assertTrue(scriptsDir.isDirectory, "Missing scripts directory")
+
+        val stylesDir = File(dokkaOutputDir, "styles")
+        assertTrue(stylesDir.isDirectory, "Missing styles directory")
+
+        val navigationHtml = File(dokkaOutputDir, "navigation.html")
+        assertTrue(navigationHtml.isFile, "Missing navigation.html")
+
+        projectDir.allHtmlFiles().forEach { file ->
+            assertContainsNoErrorClass(file)
+            assertNoUnresolvedLInks(file)
+        }
+    }
+}
diff --git a/integration-tests/cli/src/main/kotlin/org/jetbrains/dokka/it/cli/AbstractCliIntegrationTest.kt b/integration-tests/cli/src/main/kotlin/org/jetbrains/dokka/it/cli/AbstractCliIntegrationTest.kt
new file mode 100644
index 00000000..7f6f9433
--- /dev/null
+++ b/integration-tests/cli/src/main/kotlin/org/jetbrains/dokka/it/cli/AbstractCliIntegrationTest.kt
@@ -0,0 +1,36 @@
+package org.jetbrains.dokka.it.cli
+
+import org.jetbrains.dokka.it.AbstractIntegrationTest
+import java.io.File
+import kotlin.test.BeforeTest
+import kotlin.test.assertTrue
+
+abstract class AbstractCliIntegrationTest : AbstractIntegrationTest() {
+
+    protected val cliJarFile: File by lazy {
+        File(temporaryTestFolder.root, "dokka.jar")
+    }
+
+    protected val basePluginJarFile: File by lazy {
+        File(temporaryTestFolder.root, "base-plugin.jar")
+    }
+
+    @BeforeTest
+    fun copyJarFiles() {
+        val cliJarPathEnvironmentKey = "CLI_JAR_PATH"
+        val cliJarFile = File(System.getenv(cliJarPathEnvironmentKey))
+        assertTrue(
+            cliJarFile.exists() && cliJarFile.isFile,
+            "Missing path to CLI jar System.getenv($cliJarPathEnvironmentKey)"
+        )
+        cliJarFile.copyTo(this.cliJarFile)
+
+        val basePluginPathEnvironmentKey = "BASE_PLUGIN_JAR_PATH"
+        val basePluginJarFile = File(System.getenv(basePluginPathEnvironmentKey))
+        assertTrue(
+            basePluginJarFile.exists() && basePluginJarFile.isFile,
+            "Missing path to base plugin jar System.getenv($basePluginPathEnvironmentKey)"
+        )
+        basePluginJarFile.copyTo(this.basePluginJarFile)
+    }
+}
diff --git a/integration-tests/gradle/README.md b/integration-tests/gradle/README.md
new file mode 100644
index 00000000..45828092
--- /dev/null
+++ b/integration-tests/gradle/README.md
@@ -0,0 +1,7 @@
+### Note
+All Gradle projects inside the `project` subfolder can 
+also be imported to the IDE by clicking on the corresponding
+build.gradle.kts file -> "import gradle project". 
+
+Before importing: Make sure that you have dokka installed
+locally (`./gradlew publishToMavenLocal`).
diff --git a/integration-tests/gradle/build.gradle.kts b/integration-tests/gradle/build.gradle.kts
new file mode 100644
index 00000000..3da416bb
--- /dev/null
+++ b/integration-tests/gradle/build.gradle.kts
@@ -0,0 +1,16 @@
+import org.jetbrains.dependsOnMavenLocalPublication
+
+dependencies {
+    implementation(kotlin("stdlib"))
+    implementation(kotlin("test-junit"))
+    implementation(gradleTestKit())
+}
+
+tasks.integrationTest {
+    inputs.dir(file("projects"))
+    dependsOnMavenLocalPublication()
+}
+
+tasks.clean {
+    delete(File(buildDir, "gradle-test-kit"))
+}
diff --git a/integration-tests/gradle/projects/it-android-0/build.gradle.kts b/integration-tests/gradle/projects/it-android-0/build.gradle.kts
new file mode 100644
index 00000000..32c5c56c
--- /dev/null
+++ b/integration-tests/gradle/projects/it-android-0/build.gradle.kts
@@ -0,0 +1,19 @@
+plugins {
+    id("com.android.library")
+    id("org.jetbrains.dokka")
+    kotlin("android")
+}
+
+apply(from = "../template.root.gradle.kts")
+
+android {
+    defaultConfig {
+        minSdkVersion(21)
+        setCompileSdkVersion(29)
+    }
+}
+
+dependencies {
+    implementation(kotlin("stdlib"))
+}
+
diff --git a/integration-tests/gradle/projects/it-android-0/gradle.properties b/integration-tests/gradle/projects/it-android-0/gradle.properties
new file mode 100644
index 00000000..1332de19
--- /dev/null
+++ b/integration-tests/gradle/projects/it-android-0/gradle.properties
@@ -0,0 +1,2 @@
+dokka_it_kotlin_version=1.3.72
+dokka_it_android_gradle_plugin_version=4.0.0
diff --git a/integration-tests/gradle/projects/it-android-0/gradle/wrapper/gradle-wrapper.jar b/integration-tests/gradle/projects/it-android-0/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 00000000..f3d88b1c
--- /dev/null
+++ b/integration-tests/gradle/projects/it-android-0/gradle/wrapper/gradle-wrapper.jar
diff --git a/integration-tests/gradle/projects/it-android-0/gradle/wrapper/gradle-wrapper.properties b/integration-tests/gradle/projects/it-android-0/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 00000000..1b16c34a
--- /dev/null
+++ b/integration-tests/gradle/projects/it-android-0/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/integration-tests/gradle/projects/it-android-0/gradlew b/integration-tests/gradle/projects/it-android-0/gradlew
new file mode 100755
index 00000000..2fe81a7d
--- /dev/null
+++ b/integration-tests/gradle/projects/it-android-0/gradlew
@@ -0,0 +1,183 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"
diff --git a/integration-tests/gradle/projects/it-android-0/gradlew.bat b/integration-tests/gradle/projects/it-android-0/gradlew.bat
new file mode 100644
index 00000000..24467a14
--- /dev/null
+++ b/integration-tests/gradle/projects/it-android-0/gradlew.bat
@@ -0,0 +1,100 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/integration-tests/gradle/projects/it-android-0/settings.gradle.kts b/integration-tests/gradle/projects/it-android-0/settings.gradle.kts
new file mode 100644
index 00000000..664d2cb7
--- /dev/null
+++ b/integration-tests/gradle/projects/it-android-0/settings.gradle.kts
@@ -0,0 +1,5 @@
+@file:Suppress("LocalVariableName", "UnstableApiUsage")
+
+apply(from = "../template.settings.gradle.kts")
+rootProject.name = "it-android-0"
+
diff --git a/integration-tests/gradle/projects/it-android-0/src/main/AndroidManifest.xml b/integration-tests/gradle/projects/it-android-0/src/main/AndroidManifest.xml
new file mode 100644
index 00000000..a35f86be
--- /dev/null
+++ b/integration-tests/gradle/projects/it-android-0/src/main/AndroidManifest.xml
@@ -0,0 +1 @@
+<manifest package="org.jetbrains.dokka.it.android"/>
diff --git a/integration-tests/gradle/projects/it-android-0/src/main/java/it/android/AndroidSpecificClass.kt b/integration-tests/gradle/projects/it-android-0/src/main/java/it/android/AndroidSpecificClass.kt
new file mode 100644
index 00000000..cb9046b1
--- /dev/null
+++ b/integration-tests/gradle/projects/it-android-0/src/main/java/it/android/AndroidSpecificClass.kt
@@ -0,0 +1,16 @@
+@file:Suppress("unused")
+
+package it.android
+
+import android.content.Context
+import android.util.SparseIntArray
+import android.view.View
+
+/**
+ * This class is specific to android and uses android classes like:
+ * [Context], [SparseIntArray] or [View]
+ */
+class AndroidSpecificClass {
+    fun sparseIntArray() = SparseIntArray()
+    fun createView(context: Context): View = View(context)
+}
diff --git a/integration-tests/gradle/projects/it-basic-groovy/build.gradle b/integration-tests/gradle/projects/it-basic-groovy/build.gradle
new file mode 100644
index 00000000..1ffa75bc
--- /dev/null
+++ b/integration-tests/gradle/projects/it-basic-groovy/build.gradle
@@ -0,0 +1,37 @@
+plugins {
+    id 'org.jetbrains.kotlin.jvm'
+    id("org.jetbrains.dokka")
+}
+
+apply from: '../template.root.gradle.kts'
+
+dependencies {
+    implementation "org.jetbrains.kotlin:kotlin-stdlib"
+}
+
+dokkaHtml {
+    outputDirectory = "$buildDir/dokka/customHtml"
+
+    failOnWarning = false
+    dokkaSourceSets {
+        customSourceSet {
+            sourceRoot { path = "$projectDir/src/main/java" }
+            sourceRoot { path = "$projectDir/src/main/kotlin" }
+            displayName = "custom"
+            reportUndocumented = true
+        }
+    }
+}
+
+dokkaJavadoc {
+    outputDirectory = "$buildDir/dokka/customJavadoc"
+}
+
+dokkaGfm {
+    outputDirectory = "$buildDir/dokka/customGfm"
+}
+
+dokkaJekyll {
+    outputDirectory = "$buildDir/dokka/customJekyll"
+}
+
diff --git a/integration-tests/gradle/projects/it-basic-groovy/gradle.properties b/integration-tests/gradle/projects/it-basic-groovy/gradle.properties
new file mode 100644
index 00000000..7ebac3ad
--- /dev/null
+++ b/integration-tests/gradle/projects/it-basic-groovy/gradle.properties
@@ -0,0 +1 @@
+dokka_it_kotlin_version=1.3.72
diff --git a/integration-tests/gradle/projects/it-basic-groovy/gradle/wrapper/gradle-wrapper.jar b/integration-tests/gradle/projects/it-basic-groovy/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 00000000..62d4c053
--- /dev/null
+++ b/integration-tests/gradle/projects/it-basic-groovy/gradle/wrapper/gradle-wrapper.jar
diff --git a/integration-tests/gradle/projects/it-basic-groovy/gradle/wrapper/gradle-wrapper.properties b/integration-tests/gradle/projects/it-basic-groovy/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 00000000..622ab64a
--- /dev/null
+++ b/integration-tests/gradle/projects/it-basic-groovy/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/integration-tests/gradle/projects/it-basic-groovy/gradlew b/integration-tests/gradle/projects/it-basic-groovy/gradlew
new file mode 100755
index 00000000..fbd7c515
--- /dev/null
+++ b/integration-tests/gradle/projects/it-basic-groovy/gradlew
@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"
diff --git a/integration-tests/gradle/projects/it-basic-groovy/gradlew.bat b/integration-tests/gradle/projects/it-basic-groovy/gradlew.bat
new file mode 100644
index 00000000..a9f778a7
--- /dev/null
+++ b/integration-tests/gradle/projects/it-basic-groovy/gradlew.bat
@@ -0,0 +1,104 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/integration-tests/gradle/projects/it-basic-groovy/settings.gradle.kts b/integration-tests/gradle/projects/it-basic-groovy/settings.gradle.kts
new file mode 100644
index 00000000..cb6af4e9
--- /dev/null
+++ b/integration-tests/gradle/projects/it-basic-groovy/settings.gradle.kts
@@ -0,0 +1,5 @@
+@file:Suppress("LocalVariableName", "UnstableApiUsage")
+
+apply(from = "../template.settings.gradle.kts")
+rootProject.name = "it-basic-groovy"
+
diff --git a/integration-tests/gradle/projects/it-basic-groovy/src/main/java/it/basic/java/SampleJavaClass.java b/integration-tests/gradle/projects/it-basic-groovy/src/main/java/it/basic/java/SampleJavaClass.java
new file mode 100644
index 00000000..23b0202c
--- /dev/null
+++ b/integration-tests/gradle/projects/it-basic-groovy/src/main/java/it/basic/java/SampleJavaClass.java
@@ -0,0 +1,17 @@
+package it.basic.java;
+
+import it.basic.PublicClass;
+
+/**
+ * This class is, unlike {@link PublicClass}, written in Java
+ */
+@SuppressWarnings("unused")
+public class SampleJavaClass {
+
+    /**
+     * @return Empty instance of {@link PublicClass}
+     */
+    public PublicClass publicDocumentedFunction() {
+        return new PublicClass();
+    }
+}
diff --git a/integration-tests/gradle/projects/it-basic-groovy/src/main/kotlin/it/basic/PublicClass.kt b/integration-tests/gradle/projects/it-basic-groovy/src/main/kotlin/it/basic/PublicClass.kt
new file mode 100644
index 00000000..71bc7e63
--- /dev/null
+++ b/integration-tests/gradle/projects/it-basic-groovy/src/main/kotlin/it/basic/PublicClass.kt
@@ -0,0 +1,48 @@
+@file:Suppress("unused")
+
+package it.basic
+
+class PublicClass {
+    /**
+     * This function is public and documented
+     */
+    fun publicDocumentedFunction(): String = ""
+
+    fun publicUndocumentedFunction(): String = ""
+
+    /**
+     * This function is internal and documented
+     */
+    internal fun internalDocumentedFunction(): String = ""
+
+    internal fun internalUndocumentedFunction(): String = ""
+
+    /**
+     * This function is private and documented
+     */
+    private fun privateDocumentedFunction(): String = ""
+
+    private fun privateUndocumentedFunction(): String = ""
+
+
+    /**
+     * This property is public and documented
+     */
+    val publicDocumentedProperty: Int = 0
+
+    val publicUndocumentedProperty: Int = 0
+
+    /**
+     * This property internal and documented
+     */
+    val internalDocumentedProperty: Int = 0
+
+    val internalUndocumentedProperty: Int = 0
+
+    /**
+     * This property private and documented
+     */
+    private val privateDocumentedProperty: Int = 0
+
+    private val privateUndocumentedProperty: Int = 0
+}
diff --git a/integration-tests/gradle/projects/it-basic/build.gradle.kts b/integration-tests/gradle/projects/it-basic/build.gradle.kts
new file mode 100644
index 00000000..1de92418
--- /dev/null
+++ b/integration-tests/gradle/projects/it-basic/build.gradle.kts
@@ -0,0 +1,20 @@
+import org.jetbrains.dokka.gradle.DokkaTask
+
+plugins {
+    kotlin("jvm")
+    id("org.jetbrains.dokka")
+}
+
+apply(from = "../template.root.gradle.kts")
+
+dependencies {
+    implementation(kotlin("stdlib"))
+}
+
+tasks.withType<DokkaTask> {
+    dokkaSourceSets {
+        configureEach {
+            moduleDisplayName = "Basic Project"
+        }
+    }
+}
diff --git a/integration-tests/gradle/projects/it-basic/gradle.properties b/integration-tests/gradle/projects/it-basic/gradle.properties
new file mode 100644
index 00000000..7ebac3ad
--- /dev/null
+++ b/integration-tests/gradle/projects/it-basic/gradle.properties
@@ -0,0 +1 @@
+dokka_it_kotlin_version=1.3.72
diff --git a/integration-tests/gradle/projects/it-basic/gradle/wrapper/gradle-wrapper.jar b/integration-tests/gradle/projects/it-basic/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 00000000..62d4c053
--- /dev/null
+++ b/integration-tests/gradle/projects/it-basic/gradle/wrapper/gradle-wrapper.jar
diff --git a/integration-tests/gradle/projects/it-basic/gradle/wrapper/gradle-wrapper.properties b/integration-tests/gradle/projects/it-basic/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 00000000..622ab64a
--- /dev/null
+++ b/integration-tests/gradle/projects/it-basic/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.5-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/integration-tests/gradle/projects/it-basic/gradlew b/integration-tests/gradle/projects/it-basic/gradlew
new file mode 100755
index 00000000..fbd7c515
--- /dev/null
+++ b/integration-tests/gradle/projects/it-basic/gradlew
@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"
diff --git a/integration-tests/gradle/projects/it-basic/gradlew.bat b/integration-tests/gradle/projects/it-basic/gradlew.bat
new file mode 100644
index 00000000..a9f778a7
--- /dev/null
+++ b/integration-tests/gradle/projects/it-basic/gradlew.bat
@@ -0,0 +1,104 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/integration-tests/gradle/projects/it-basic/settings.gradle.kts b/integration-tests/gradle/projects/it-basic/settings.gradle.kts
new file mode 100644
index 00000000..833995e5
--- /dev/null
+++ b/integration-tests/gradle/projects/it-basic/settings.gradle.kts
@@ -0,0 +1,5 @@
+@file:Suppress("LocalVariableName", "UnstableApiUsage")
+
+apply(from = "../template.settings.gradle.kts")
+rootProject.name = "it-basic"
+
diff --git a/integration-tests/gradle/projects/it-basic/src/main/java/it/basic/java/SampleJavaClass.java b/integration-tests/gradle/projects/it-basic/src/main/java/it/basic/java/SampleJavaClass.java
new file mode 100644
index 00000000..23b0202c
--- /dev/null
+++ b/integration-tests/gradle/projects/it-basic/src/main/java/it/basic/java/SampleJavaClass.java
@@ -0,0 +1,17 @@
+package it.basic.java;
+
+import it.basic.PublicClass;
+
+/**
+ * This class is, unlike {@link PublicClass}, written in Java
+ */
+@SuppressWarnings("unused")
+public class SampleJavaClass {
+
+    /**
+     * @return Empty instance of {@link PublicClass}
+     */
+    public PublicClass publicDocumentedFunction() {
+        return new PublicClass();
+    }
+}
diff --git a/integration-tests/gradle/projects/it-basic/src/main/kotlin/it/basic/PublicClass.kt b/integration-tests/gradle/projects/it-basic/src/main/kotlin/it/basic/PublicClass.kt
new file mode 100644
index 00000000..71bc7e63
--- /dev/null
+++ b/integration-tests/gradle/projects/it-basic/src/main/kotlin/it/basic/PublicClass.kt
@@ -0,0 +1,48 @@
+@file:Suppress("unused")
+
+package it.basic
+
+class PublicClass {
+    /**
+     * This function is public and documented
+     */
+    fun publicDocumentedFunction(): String = ""
+
+    fun publicUndocumentedFunction(): String = ""
+
+    /**
+     * This function is internal and documented
+     */
+    internal fun internalDocumentedFunction(): String = ""
+
+    internal fun internalUndocumentedFunction(): String = ""
+
+    /**
+     * This function is private and documented
+     */
+    private fun privateDocumentedFunction(): String = ""
+
+    private fun privateUndocumentedFunction(): String = ""
+
+
+    /**
+     * This property is public and documented
+     */
+    val publicDocumentedProperty: Int = 0
+
+    val publicUndocumentedProperty: Int = 0
+
+    /**
+     * This property internal and documented
+     */
+    val internalDocumentedProperty: Int = 0
+
+    val internalUndocumentedProperty: Int = 0
+
+    /**
+     * This property private and documented
+     */
+    private val privateDocumentedProperty: Int = 0
+
+    private val privateUndocumentedProperty: Int = 0
+}
diff --git a/integration-tests/gradle/projects/it-multimodule-0/build.gradle.kts b/integration-tests/gradle/projects/it-multimodule-0/build.gradle.kts
new file mode 100644
index 00000000..29b7550c
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multimodule-0/build.gradle.kts
@@ -0,0 +1 @@
+apply(from = "../template.root.gradle.kts")
diff --git a/integration-tests/gradle/projects/it-multimodule-0/gradle.properties b/integration-tests/gradle/projects/it-multimodule-0/gradle.properties
new file mode 100644
index 00000000..7ebac3ad
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multimodule-0/gradle.properties
@@ -0,0 +1 @@
+dokka_it_kotlin_version=1.3.72
diff --git a/integration-tests/gradle/projects/it-multimodule-0/gradle/wrapper/gradle-wrapper.jar b/integration-tests/gradle/projects/it-multimodule-0/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 00000000..f3d88b1c
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multimodule-0/gradle/wrapper/gradle-wrapper.jar
diff --git a/integration-tests/gradle/projects/it-multimodule-0/gradle/wrapper/gradle-wrapper.properties b/integration-tests/gradle/projects/it-multimodule-0/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 00000000..1b16c34a
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multimodule-0/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/integration-tests/gradle/projects/it-multimodule-0/gradlew b/integration-tests/gradle/projects/it-multimodule-0/gradlew
new file mode 100755
index 00000000..2fe81a7d
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multimodule-0/gradlew
@@ -0,0 +1,183 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"
diff --git a/integration-tests/gradle/projects/it-multimodule-0/gradlew.bat b/integration-tests/gradle/projects/it-multimodule-0/gradlew.bat
new file mode 100644
index 00000000..24467a14
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multimodule-0/gradlew.bat
@@ -0,0 +1,100 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/integration-tests/gradle/projects/it-multimodule-0/moduleA/build.gradle.kts b/integration-tests/gradle/projects/it-multimodule-0/moduleA/build.gradle.kts
new file mode 100644
index 00000000..ab86c333
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multimodule-0/moduleA/build.gradle.kts
@@ -0,0 +1,6 @@
+plugins {
+    // TODO: File bug report for gradle: :moduleA:moduleB:dokkaHtml is missing kotlin gradle plugin from
+    //  the runtime classpath during execution without this plugin in the parent project
+    kotlin("jvm")
+    id("org.jetbrains.dokka")
+}
diff --git a/integration-tests/gradle/projects/it-multimodule-0/moduleA/moduleB/README.md b/integration-tests/gradle/projects/it-multimodule-0/moduleA/moduleB/README.md
new file mode 100644
index 00000000..f8c52880
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multimodule-0/moduleA/moduleB/README.md
@@ -0,0 +1,2 @@
+# Module moduleB
+Here is some description for module B
diff --git a/integration-tests/gradle/projects/it-multimodule-0/moduleA/moduleB/build.gradle.kts b/integration-tests/gradle/projects/it-multimodule-0/moduleA/moduleB/build.gradle.kts
new file mode 100644
index 00000000..9492fdc8
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multimodule-0/moduleA/moduleB/build.gradle.kts
@@ -0,0 +1,8 @@
+plugins {
+    kotlin("jvm")
+    id("org.jetbrains.dokka")
+}
+
+dependencies {
+    implementation(kotlin("stdlib"))
+}
diff --git a/integration-tests/gradle/projects/it-multimodule-0/moduleA/moduleB/src/main/kotlin/org/jetbrains/dokka/it/moduleB/ModuleB.kt b/integration-tests/gradle/projects/it-multimodule-0/moduleA/moduleB/src/main/kotlin/org/jetbrains/dokka/it/moduleB/ModuleB.kt
new file mode 100644
index 00000000..430e2234
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multimodule-0/moduleA/moduleB/src/main/kotlin/org/jetbrains/dokka/it/moduleB/ModuleB.kt
@@ -0,0 +1,6 @@
+package org.jetbrains.dokka.it.moduleB
+
+@Suppress("unused")
+class ModuleB {
+    fun undocumentedPublicFunction() {}
+}
diff --git a/integration-tests/gradle/projects/it-multimodule-0/moduleA/moduleC/README.md b/integration-tests/gradle/projects/it-multimodule-0/moduleA/moduleC/README.md
new file mode 100644
index 00000000..4ead5671
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multimodule-0/moduleA/moduleC/README.md
@@ -0,0 +1,2 @@
+# Module moduleC
+Here is some description for module C
diff --git a/integration-tests/gradle/projects/it-multimodule-0/moduleA/moduleC/build.gradle.kts b/integration-tests/gradle/projects/it-multimodule-0/moduleA/moduleC/build.gradle.kts
new file mode 100644
index 00000000..9492fdc8
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multimodule-0/moduleA/moduleC/build.gradle.kts
@@ -0,0 +1,8 @@
+plugins {
+    kotlin("jvm")
+    id("org.jetbrains.dokka")
+}
+
+dependencies {
+    implementation(kotlin("stdlib"))
+}
diff --git a/integration-tests/gradle/projects/it-multimodule-0/moduleA/moduleC/src/main/kotlin/org/jetbrains/dokka/it/moduleC/ModuleC.kt b/integration-tests/gradle/projects/it-multimodule-0/moduleA/moduleC/src/main/kotlin/org/jetbrains/dokka/it/moduleC/ModuleC.kt
new file mode 100644
index 00000000..e14d68e0
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multimodule-0/moduleA/moduleC/src/main/kotlin/org/jetbrains/dokka/it/moduleC/ModuleC.kt
@@ -0,0 +1,6 @@
+package org.jetbrains.dokka.it.moduleC
+
+@Suppress("unused")
+class ModuleC {
+    fun undocumentedPublicFunction() {}
+}
diff --git a/integration-tests/gradle/projects/it-multimodule-0/settings.gradle.kts b/integration-tests/gradle/projects/it-multimodule-0/settings.gradle.kts
new file mode 100644
index 00000000..a5c89291
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multimodule-0/settings.gradle.kts
@@ -0,0 +1,5 @@
+apply(from = "../template.settings.gradle.kts")
+rootProject.name = "it-multimodule-0"
+include(":moduleA")
+include(":moduleA:moduleB")
+include(":moduleA:moduleC")
diff --git a/integration-tests/gradle/projects/it-multiplatform-0/build.gradle.kts b/integration-tests/gradle/projects/it-multiplatform-0/build.gradle.kts
new file mode 100644
index 00000000..247e4c15
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multiplatform-0/build.gradle.kts
@@ -0,0 +1,25 @@
+import org.jetbrains.dokka.gradle.DokkaTask
+
+plugins {
+    kotlin("multiplatform")
+    id("org.jetbrains.dokka")
+}
+
+apply(from = "../template.root.gradle.kts")
+
+kotlin {
+    jvm()
+    linuxX64("linux")
+    macosX64("macos")
+    js()
+}
+
+tasks.withType<DokkaTask> {
+    dokkaSourceSets {
+        create("commonMain")
+        create("jvmMain")
+        create("linuxMain")
+        create("macosMain")
+        create("jsMain")
+    }
+}
diff --git a/integration-tests/gradle/projects/it-multiplatform-0/gradle.properties b/integration-tests/gradle/projects/it-multiplatform-0/gradle.properties
new file mode 100644
index 00000000..7ebac3ad
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multiplatform-0/gradle.properties
@@ -0,0 +1 @@
+dokka_it_kotlin_version=1.3.72
diff --git a/integration-tests/gradle/projects/it-multiplatform-0/gradle/wrapper/gradle-wrapper.jar b/integration-tests/gradle/projects/it-multiplatform-0/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 00000000..f3d88b1c
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multiplatform-0/gradle/wrapper/gradle-wrapper.jar
diff --git a/integration-tests/gradle/projects/it-multiplatform-0/gradle/wrapper/gradle-wrapper.properties b/integration-tests/gradle/projects/it-multiplatform-0/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 00000000..1b16c34a
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multiplatform-0/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/integration-tests/gradle/projects/it-multiplatform-0/gradlew b/integration-tests/gradle/projects/it-multiplatform-0/gradlew
new file mode 100755
index 00000000..2fe81a7d
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multiplatform-0/gradlew
@@ -0,0 +1,183 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"
diff --git a/integration-tests/gradle/projects/it-multiplatform-0/gradlew.bat b/integration-tests/gradle/projects/it-multiplatform-0/gradlew.bat
new file mode 100644
index 00000000..24467a14
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multiplatform-0/gradlew.bat
@@ -0,0 +1,100 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/integration-tests/gradle/projects/it-multiplatform-0/settings.gradle.kts b/integration-tests/gradle/projects/it-multiplatform-0/settings.gradle.kts
new file mode 100644
index 00000000..1894bed8
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multiplatform-0/settings.gradle.kts
@@ -0,0 +1,2 @@
+apply(from = "../template.settings.gradle.kts")
+rootProject.name = "it-multiplatform-0"
diff --git a/integration-tests/gradle/projects/it-multiplatform-0/src/commonMain/kotlin/it/mpp0/CommonMainClass.kt b/integration-tests/gradle/projects/it-multiplatform-0/src/commonMain/kotlin/it/mpp0/CommonMainClass.kt
new file mode 100644
index 00000000..499a4f1e
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multiplatform-0/src/commonMain/kotlin/it/mpp0/CommonMainClass.kt
@@ -0,0 +1,8 @@
+package it.mpp0
+
+/**
+ * This class is defined in commonMain
+ */
+class CommonMainClass {
+    fun publicFunction(): String = "public"
+}
diff --git a/integration-tests/gradle/projects/it-multiplatform-0/src/commonMain/kotlin/it/mpp0/ExpectedClass.kt b/integration-tests/gradle/projects/it-multiplatform-0/src/commonMain/kotlin/it/mpp0/ExpectedClass.kt
new file mode 100644
index 00000000..e610b09a
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multiplatform-0/src/commonMain/kotlin/it/mpp0/ExpectedClass.kt
@@ -0,0 +1,5 @@
+package it.mpp0
+
+expect class ExpectedClass {
+    val platform: String
+}
diff --git a/integration-tests/gradle/projects/it-multiplatform-0/src/jsMain/kotlin/it/mpp0/ExpectedClass.kt b/integration-tests/gradle/projects/it-multiplatform-0/src/jsMain/kotlin/it/mpp0/ExpectedClass.kt
new file mode 100644
index 00000000..1e4a6d22
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multiplatform-0/src/jsMain/kotlin/it/mpp0/ExpectedClass.kt
@@ -0,0 +1,5 @@
+package it.mpp0
+
+actual class ExpectedClass {
+    actual val platform: String = "js"
+}
diff --git a/integration-tests/gradle/projects/it-multiplatform-0/src/jvmMain/kotlin/it/mpp0/ExpectedClass.kt b/integration-tests/gradle/projects/it-multiplatform-0/src/jvmMain/kotlin/it/mpp0/ExpectedClass.kt
new file mode 100644
index 00000000..8e7fa96e
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multiplatform-0/src/jvmMain/kotlin/it/mpp0/ExpectedClass.kt
@@ -0,0 +1,5 @@
+package it.mpp0
+
+actual class ExpectedClass {
+    actual val platform: String = "jvm"
+}
diff --git a/integration-tests/gradle/projects/it-multiplatform-0/src/linuxMain/kotlin/it/mpp0/ExpectedClass.kt b/integration-tests/gradle/projects/it-multiplatform-0/src/linuxMain/kotlin/it/mpp0/ExpectedClass.kt
new file mode 100644
index 00000000..19070a96
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multiplatform-0/src/linuxMain/kotlin/it/mpp0/ExpectedClass.kt
@@ -0,0 +1,5 @@
+package it.mpp0
+
+actual class ExpectedClass {
+    actual val platform: String = "linux"
+}
diff --git a/integration-tests/gradle/projects/it-multiplatform-0/src/macosMain/kotlin/it/mpp0/ExpectedClass.kt b/integration-tests/gradle/projects/it-multiplatform-0/src/macosMain/kotlin/it/mpp0/ExpectedClass.kt
new file mode 100644
index 00000000..7a4a8f75
--- /dev/null
+++ b/integration-tests/gradle/projects/it-multiplatform-0/src/macosMain/kotlin/it/mpp0/ExpectedClass.kt
@@ -0,0 +1,5 @@
+package it.mpp0
+
+actual class ExpectedClass {
+    actual val platform: String = "macos"
+}
diff --git a/integration-tests/gradle/projects/template.root.gradle.kts b/integration-tests/gradle/projects/template.root.gradle.kts
new file mode 100644
index 00000000..51d199ff
--- /dev/null
+++ b/integration-tests/gradle/projects/template.root.gradle.kts
@@ -0,0 +1,18 @@
+allprojects {
+    repositories {
+        maven("https://dl.bintray.com/kotlin/kotlin-eap/")
+        maven("https://dl.bintray.com/kotlin/kotlin-dev/")
+        jcenter()
+        mavenLocal()
+        mavenCentral()
+        google()
+    }
+}
+
+afterEvaluate {
+    logger.quiet("Gradle version: ${gradle.gradleVersion}")
+    logger.quiet("Kotlin version: ${properties["dokka_it_kotlin_version"]}")
+    properties["dokka_it_android_gradle_plugin_version"]?.let { androidVersion ->
+        logger.quiet("Android version: $androidVersion")
+    }
+}
diff --git a/integration-tests/gradle/projects/template.settings.gradle.kts b/integration-tests/gradle/projects/template.settings.gradle.kts
new file mode 100644
index 00000000..7fe3c510
--- /dev/null
+++ b/integration-tests/gradle/projects/template.settings.gradle.kts
@@ -0,0 +1,37 @@
+@file:Suppress("LocalVariableName", "UnstableApiUsage")
+
+pluginManagement {
+    val dokka_it_kotlin_version: String by settings
+    val dokka_it_android_gradle_plugin_version: String? by settings
+
+    plugins {
+        id("org.jetbrains.kotlin.jvm") version dokka_it_kotlin_version
+        id("org.jetbrains.kotlin.android") version dokka_it_kotlin_version
+        id("org.jetbrains.kotlin.multiplatform") version dokka_it_kotlin_version
+    }
+
+    resolutionStrategy {
+        eachPlugin {
+            if (requested.id.id == "org.jetbrains.dokka") {
+                useModule("org.jetbrains.dokka:dokka-gradle-plugin:for-integration-tests-SNAPSHOT")
+            }
+
+            if (requested.id.id == "com.android.library") {
+                useModule("com.android.tools.build:gradle:$dokka_it_android_gradle_plugin_version")
+            }
+
+            if (requested.id.id == "com.android.application") {
+                useModule("com.android.tools.build:gradle:$dokka_it_android_gradle_plugin_version")
+            }
+        }
+    }
+    repositories {
+        maven("https://dl.bintray.com/kotlin/kotlin-eap")
+        maven("https://dl.bintray.com/kotlin/kotlin-dev/")
+        mavenLocal()
+        mavenCentral()
+        jcenter()
+        gradlePluginPortal()
+        google()
+    }
+}
diff --git a/integration-tests/gradle/src/integrationTest/kotlin/org/jetbrains/dokka/it/gradle/Android0GradleIntegrationTest.kt b/integration-tests/gradle/src/integrationTest/kotlin/org/jetbrains/dokka/it/gradle/Android0GradleIntegrationTest.kt
new file mode 100644
index 00000000..2a9d7a70
--- /dev/null
+++ b/integration-tests/gradle/src/integrationTest/kotlin/org/jetbrains/dokka/it/gradle/Android0GradleIntegrationTest.kt
@@ -0,0 +1,77 @@
+package org.jetbrains.dokka.it.gradle
+
+import org.gradle.testkit.runner.TaskOutcome
+import org.jetbrains.dokka.it.isAndroidSdkInstalled
+import org.jetbrains.dokka.it.isCI
+import org.junit.Assume
+import org.junit.runners.Parameterized.Parameters
+import java.io.File
+import kotlin.test.*
+
+class Android0GradleIntegrationTest(override val versions: BuildVersions) : AbstractGradleIntegrationTest() {
+
+    companion object {
+        @get:JvmStatic
+        @get:Parameters(name = "{0}")
+        val versions = BuildVersions.permutations(
+            gradleVersions = listOf("6.5.1", "5.6.4"),
+            kotlinVersions = listOf("1.3.72", "1.4-M3"),
+            androidGradlePluginVersions = listOf("3.5.3", "3.6.3")
+        ) + BuildVersions.permutations(
+            gradleVersions = listOf("6.5.1", "6.1.1"),
+            kotlinVersions = listOf("1.3.72", "1.4-M3"),
+            androidGradlePluginVersions = listOf("4.0.0")
+        ) + BuildVersions.permutations(
+            gradleVersions = listOf("6.5.1"),
+            kotlinVersions = listOf("1.3.72", "1.4-M3"),
+            androidGradlePluginVersions = listOf("4.1.0-beta02")
+        )
+    }
+
+    @BeforeTest
+    fun assumeAndroidInstallation() {
+        if (isCI) {
+            return
+        }
+        Assume.assumeTrue("Missing ANDROID_SDK_ROOT", isAndroidSdkInstalled)
+    }
+
+    @BeforeTest
+    fun prepareProjectFiles() {
+        val templateProjectDir = File("projects", "it-android-0")
+
+        templateProjectDir.listFiles().orEmpty()
+            .filter { it.isFile }
+            .filterNot { it.name == "local.properties" }
+            .filterNot { it.name.startsWith("gradlew") }
+            .forEach { topLevelFile -> topLevelFile.copyTo(File(projectDir, topLevelFile.name)) }
+
+        File(templateProjectDir, "src").copyRecursively(File(projectDir, "src"))
+    }
+
+    @Test
+    fun execute() {
+        val result = createGradleRunner("dokkaHtml", "-i", "-s").buildRelaxed()
+        assertEquals(TaskOutcome.SUCCESS, assertNotNull(result.task(":dokkaHtml")).outcome)
+
+        val htmlOutputDir = File(projectDir, "build/dokka/html")
+        assertTrue(htmlOutputDir.isDirectory, "Missing html output directory")
+
+        assertTrue(
+            htmlOutputDir.allHtmlFiles().count() > 0,
+            "Expected html files in html output directory"
+        )
+
+        htmlOutputDir.allHtmlFiles().forEach { file ->
+            assertContainsNoErrorClass(file)
+            assertNoUnresolvedLInks(file)
+            assertNoHrefToMissingLocalFileOrDirectory(file)
+        }
+
+        assertTrue(
+            htmlOutputDir.allHtmlFiles().any { file ->
+                "https://developer.android.com/reference/android/content/Context.html" in file.readText()
+            }, "Expected link to developer.android.com"
+        )
+    }
+}
diff --git a/integration-tests/gradle/src/integrationTest/kotlin/org/jetbrains/dokka/it/gradle/BasicGradleIntegrationTest.kt b/integration-tests/gradle/src/integrationTest/kotlin/org/jetbrains/dokka/it/gradle/BasicGradleIntegrationTest.kt
new file mode 100644
index 00000000..30b560e7
--- /dev/null
+++ b/integration-tests/gradle/src/integrationTest/kotlin/org/jetbrains/dokka/it/gradle/BasicGradleIntegrationTest.kt
@@ -0,0 +1,99 @@
+package org.jetbrains.dokka.it.gradle
+
+import org.gradle.testkit.runner.TaskOutcome
+import org.junit.runners.Parameterized.Parameters
+import java.io.File
+import kotlin.test.*
+
+class BasicGradleIntegrationTest(override val versions: BuildVersions) : AbstractGradleIntegrationTest() {
+
+    companion object {
+        @get:JvmStatic
+        @get:Parameters(name = "{0}")
+        val versions = BuildVersions.permutations(
+            gradleVersions = listOf("6.5.1", "6.4.1", "6.3", "6.2.2", "6.1.1", "6.0", "5.6.4"),
+            kotlinVersions = listOf("1.3.30", "1.3.72", "1.4-M3")
+        )
+    }
+
+    @BeforeTest
+    fun prepareProjectFiles() {
+        val templateProjectDir = File("projects", "it-basic")
+
+        templateProjectDir.listFiles().orEmpty()
+            .filter { it.isFile }
+            .forEach { topLevelFile -> topLevelFile.copyTo(File(projectDir, topLevelFile.name)) }
+
+        File(templateProjectDir, "src").copyRecursively(File(projectDir, "src"))
+    }
+
+    @Test
+    fun execute() {
+        val result = createGradleRunner("dokkaHtml", "dokkaJavadoc", "dokkaGfm", "dokkaJekyll", "-i", "-s")
+            .buildRelaxed()
+
+        assertEquals(TaskOutcome.SUCCESS, assertNotNull(result.task(":dokkaHtml")).outcome)
+        assertEquals(TaskOutcome.SUCCESS, assertNotNull(result.task(":dokkaJavadoc")).outcome)
+        assertEquals(TaskOutcome.SUCCESS, assertNotNull(result.task(":dokkaGfm")).outcome)
+        assertEquals(TaskOutcome.SUCCESS, assertNotNull(result.task(":dokkaJekyll")).outcome)
+
+        File(projectDir, "build/dokka/html").assertKdocOutputDir()
+        File(projectDir, "build/dokka/javadoc").assertJavadocOutputDir()
+        File(projectDir, "build/dokka/gfm").assertGfmOutputDir()
+        File(projectDir, "build/dokka/jekyll").assertJekyllOutputDir()
+    }
+
+    private fun File.assertKdocOutputDir() {
+        assertTrue(isDirectory, "Missing dokka html output directory")
+
+        val imagesDir = File(this, "images")
+        assertTrue(imagesDir.isDirectory, "Missing images directory")
+
+        val scriptsDir = File(this, "scripts")
+        assertTrue(scriptsDir.isDirectory, "Missing scripts directory")
+
+        val stylesDir = File(this, "styles")
+        assertTrue(stylesDir.isDirectory, "Missing styles directory")
+
+        val navigationHtml = File(this, "navigation.html")
+        assertTrue(navigationHtml.isFile, "Missing navigation.html")
+
+        val moduleOutputDir = File(this, "-basic -project")
+        assertTrue(moduleOutputDir.isDirectory, "Missing module directory")
+
+        val moduleIndexHtml = File(moduleOutputDir, "index.html")
+        assertTrue(moduleIndexHtml.isFile, "Missing module index.html")
+
+        val modulePackageDir = File(moduleOutputDir, "it.basic")
+        assertTrue(modulePackageDir.isDirectory, "Missing it.basic package directory")
+
+        val modulePackageIndexHtml = File(modulePackageDir, "index.html")
+        assertTrue(modulePackageIndexHtml.isFile, "Missing module package index.html")
+
+        val moduleJavaPackageDir = File(moduleOutputDir, "it.basic.java")
+        assertTrue(moduleJavaPackageDir.isDirectory, "Missing it.basic.java package directory")
+
+        allHtmlFiles().forEach { file ->
+            assertContainsNoErrorClass(file)
+            assertNoUnresolvedLInks(file)
+            assertNoHrefToMissingLocalFileOrDirectory(file)
+        }
+
+        assertTrue(
+            allHtmlFiles().any { file -> "Basic Project" in file.readText() },
+            "Expected configured moduleDisplayName to be present in html"
+        )
+    }
+
+    private fun File.assertJavadocOutputDir() {
+        assertTrue(isDirectory, "Missing dokka javadoc output directory")
+    }
+
+    private fun File.assertGfmOutputDir() {
+        assertTrue(isDirectory, "Missing dokka gfm output directory")
+    }
+
+    private fun File.assertJekyllOutputDir() {
+        assertTrue(isDirectory, "Missing dokka jekyll output directory")
+    }
+}
diff --git a/integration-tests/gradle/src/integrationTest/kotlin/org/jetbrains/dokka/it/gradle/BasicGroovyIntegrationTest.kt b/integration-tests/gradle/src/integrationTest/kotlin/org/jetbrains/dokka/it/gradle/BasicGroovyIntegrationTest.kt
new file mode 100644
index 00000000..92b7ec40
--- /dev/null
+++ b/integration-tests/gradle/src/integrationTest/kotlin/org/jetbrains/dokka/it/gradle/BasicGroovyIntegrationTest.kt
@@ -0,0 +1,98 @@
+package org.jetbrains.dokka.it.gradle
+
+import org.gradle.testkit.runner.TaskOutcome
+import org.junit.runners.Parameterized
+import java.io.File
+import kotlin.test.assertEquals
+import kotlin.test.assertNotNull
+import kotlin.test.assertTrue
+import kotlin.test.BeforeTest
+import kotlin.test.Test
+
+class BasicGroovyIntegrationTest(override val versions: BuildVersions) : AbstractGradleIntegrationTest() {
+
+    companion object {
+        @get:JvmStatic
+        @get:Parameterized.Parameters(name = "{0}")
+        val versions = BuildVersions.permutations(
+            gradleVersions = listOf("6.5.1", "5.6.4"),
+            kotlinVersions = listOf("1.4-M3")
+        )
+    }
+
+    @BeforeTest
+    fun prepareProjectFiles() {
+        val templateProjectDir = File("projects", "it-basic-groovy")
+
+        templateProjectDir.listFiles().orEmpty()
+            .filter { it.isFile }
+            .forEach { topLevelFile -> topLevelFile.copyTo(File(projectDir, topLevelFile.name)) }
+
+        File(templateProjectDir, "src").copyRecursively(File(projectDir, "src"))
+    }
+
+    @Test
+    fun execute() {
+        val result = createGradleRunner("dokkaHtml", "dokkaJavadoc", "dokkaGfm", "dokkaJekyll", "-i", "-s")
+            .buildRelaxed()
+
+        assertEquals(TaskOutcome.SUCCESS, assertNotNull(result.task(":dokkaHtml")).outcome)
+        assertEquals(TaskOutcome.SUCCESS, assertNotNull(result.task(":dokkaJavadoc")).outcome)
+        assertEquals(TaskOutcome.SUCCESS, assertNotNull(result.task(":dokkaGfm")).outcome)
+        assertEquals(TaskOutcome.SUCCESS, assertNotNull(result.task(":dokkaJekyll")).outcome)
+
+        File(projectDir, "build/dokka/customHtml").assertKdocOutputDir()
+        File(projectDir, "build/dokka/customJavadoc").assertJavadocOutputDir()
+        File(projectDir, "build/dokka/customGfm").assertGfmOutputDir()
+        File(projectDir, "build/dokka/customJekyll").assertJekyllOutputDir()
+    }
+
+    private fun File.assertKdocOutputDir() {
+        assertTrue(isDirectory, "Missing dokka html output directory")
+
+        val imagesDir = File(this, "images")
+        assertTrue(imagesDir.isDirectory, "Missing images directory")
+
+        val scriptsDir = File(this, "scripts")
+        assertTrue(scriptsDir.isDirectory, "Missing scripts directory")
+
+        val stylesDir = File(this, "styles")
+        assertTrue(stylesDir.isDirectory, "Missing styles directory")
+
+        val navigationHtml = File(this, "navigation.html")
+        assertTrue(navigationHtml.isFile, "Missing navigation.html")
+
+        val moduleOutputDir = File(this, "it-basic-groovy")
+        assertTrue(moduleOutputDir.isDirectory, "Missing module directory")
+
+        val moduleIndexHtml = File(moduleOutputDir, "index.html")
+        assertTrue(moduleIndexHtml.isFile, "Missing module index.html")
+
+        val modulePackageDir = File(moduleOutputDir, "it.basic")
+        assertTrue(modulePackageDir.isDirectory, "Missing it.basic package directory")
+
+        val modulePackageIndexHtml = File(modulePackageDir, "index.html")
+        assertTrue(modulePackageIndexHtml.isFile, "Missing module package index.html")
+
+        val moduleJavaPackageDir = File(moduleOutputDir, "it.basic.java")
+        assertTrue(moduleJavaPackageDir.isDirectory, "Missing it.basic.java package directory")
+
+        allHtmlFiles().forEach { file ->
+            assertContainsNoErrorClass(file)
+            assertNoUnresolvedLInks(file)
+            assertNoHrefToMissingLocalFileOrDirectory(file)
+        }
+    }
+
+    private fun File.assertJavadocOutputDir() {
+        assertTrue(isDirectory, "Missing dokka javadoc output directory")
+    }
+
+    private fun File.assertGfmOutputDir() {
+        assertTrue(isDirectory, "Missing dokka gfm output directory")
+    }
+
+    private fun File.assertJekyllOutputDir() {
+        assertTrue(isDirectory, "Missing dokka jekyll output directory")
+    }
+}
diff --git a/integration-tests/gradle/src/integrationTest/kotlin/org/jetbrains/dokka/it/gradle/Multimodule0IntegrationTest.kt b/integration-tests/gradle/src/integrationTest/kotlin/org/jetbrains/dokka/it/gradle/Multimodule0IntegrationTest.kt
new file mode 100644
index 00000000..390db3a0
--- /dev/null
+++ b/integration-tests/gradle/src/integrationTest/kotlin/org/jetbrains/dokka/it/gradle/Multimodule0IntegrationTest.kt
@@ -0,0 +1,61 @@
+package org.jetbrains.dokka.it.gradle
+
+import org.gradle.testkit.runner.TaskOutcome
+import org.junit.runners.Parameterized
+import java.io.File
+import kotlin.test.*
+
+class Multimodule0IntegrationTest(override val versions: BuildVersions) : AbstractGradleIntegrationTest() {
+    companion object {
+        @get:JvmStatic
+        @get:Parameterized.Parameters(name = "{0}")
+        val versions = BuildVersions.permutations(
+            gradleVersions = listOf("6.5.1", "6.1.1"),
+            kotlinVersions = listOf("1.4-M3")
+        )
+    }
+
+    @BeforeTest
+    fun prepareProjectFiles() {
+        val templateProjectDir = File("projects", "it-multimodule-0")
+        templateProjectDir.listFiles().orEmpty()
+            .filter { it.isFile }
+            .forEach { topLevelFile -> topLevelFile.copyTo(File(projectDir, topLevelFile.name)) }
+        File(templateProjectDir, "moduleA").copyRecursively(File(projectDir, "moduleA"))
+    }
+
+    @Test
+    fun execute() {
+        val result = createGradleRunner(":moduleA:dokkaHtmlMultimodule", "-i","-s").buildRelaxed()
+
+        assertEquals(TaskOutcome.SUCCESS, assertNotNull(result.task(":moduleA:dokkaHtmlMultimodule")).outcome)
+
+        val outputDir = File(projectDir, "moduleA/build/dokka/htmlMultimodule")
+        assertTrue(outputDir.isDirectory, "Missing dokka output directory")
+
+        assertTrue(
+            outputDir.allHtmlFiles().any(),
+            "Expected at least one html file being generated"
+        )
+
+        outputDir.allHtmlFiles().forEach { file ->
+            assertContainsNoErrorClass(file)
+            assertNoUnresolvedLInks(file)
+            assertNoHrefToMissingLocalFileOrDirectory(file)
+        }
+
+        val modulesFile = File(outputDir, "-modules.html")
+        assertTrue(modulesFile.isFile, "Missing -modules.html file")
+
+        val modulesFileText = modulesFile.readText()
+        assertTrue(
+            "moduleB" in modulesFileText,
+            "Expected moduleB being mentioned in -modules.html"
+        )
+        assertTrue(
+            "moduleC" in modulesFileText,
+            "Expected moduleC being mentioned in -modules.html"
+        )
+
+    }
+}
diff --git a/integration-tests/gradle/src/integrationTest/kotlin/org/jetbrains/dokka/it/gradle/Multiplatform0GradleIntegrationTest.kt b/integration-tests/gradle/src/integrationTest/kotlin/org/jetbrains/dokka/it/gradle/Multiplatform0GradleIntegrationTest.kt
new file mode 100644
index 00000000..6a3b9c83
--- /dev/null
+++ b/integration-tests/gradle/src/integrationTest/kotlin/org/jetbrains/dokka/it/gradle/Multiplatform0GradleIntegrationTest.kt
@@ -0,0 +1,43 @@
+package org.jetbrains.dokka.it.gradle
+
+import org.gradle.testkit.runner.TaskOutcome
+import org.junit.runners.Parameterized
+import java.io.File
+import kotlin.test.*
+
+class Multiplatform0GradleIntegrationTest(override val versions: BuildVersions) : AbstractGradleIntegrationTest() {
+
+    companion object {
+        @get:JvmStatic
+        @get:Parameterized.Parameters(name = "{0}")
+        val versions = BuildVersions.permutations(
+            gradleVersions = listOf("6.5.1", "6.1.1"),
+            kotlinVersions = listOf("1.3.30", "1.3.72", "1.4-M3")
+        )
+    }
+
+    @BeforeTest
+    fun prepareProjectFiles() {
+        val templateProjectDir = File("projects", "it-multiplatform-0")
+        templateProjectDir.listFiles().orEmpty()
+            .filter { it.isFile }
+            .forEach { topLevelFile -> topLevelFile.copyTo(File(projectDir, topLevelFile.name)) }
+        File(templateProjectDir, "src").copyRecursively(File(projectDir, "src"))
+    }
+
+    @Test
+    fun execute() {
+        val result = createGradleRunner("dokkaHtml", "-i", "-s").buildRelaxed()
+
+        assertEquals(TaskOutcome.SUCCESS, assertNotNull(result.task(":dokkaHtml")).outcome)
+
+        val dokkaOutputDir = File(projectDir, "build/dokka/html")
+        assertTrue(dokkaOutputDir.isDirectory, "Missing dokka output directory")
+
+        dokkaOutputDir.allHtmlFiles().forEach { file ->
+            assertContainsNoErrorClass(file)
+            assertNoUnresolvedLInks(file)
+            assertNoHrefToMissingLocalFileOrDirectory(file)
+        }
+    }
+}
diff --git a/integration-tests/gradle/src/main/kotlin/org/jetbrains/dokka/it/gradle/AbstractGradleIntegrationTest.kt b/integration-tests/gradle/src/main/kotlin/org/jetbrains/dokka/it/gradle/AbstractGradleIntegrationTest.kt
new file mode 100644
index 00000000..f852dc8b
--- /dev/null
+++ b/integration-tests/gradle/src/main/kotlin/org/jetbrains/dokka/it/gradle/AbstractGradleIntegrationTest.kt
@@ -0,0 +1,74 @@
+package org.jetbrains.dokka.it.gradle
+
+import org.gradle.testkit.runner.BuildResult
+import org.gradle.testkit.runner.GradleRunner
+import org.gradle.testkit.runner.internal.DefaultGradleRunner
+import org.gradle.tooling.GradleConnectionException
+import org.jetbrains.dokka.it.AbstractIntegrationTest
+import org.junit.Assume
+import org.junit.Assume.assumeFalse
+import org.junit.AssumptionViolatedException
+import org.junit.runner.RunWith
+import org.junit.runners.Parameterized
+import java.io.File
+import kotlin.test.BeforeTest
+
+@RunWith(Parameterized::class)
+abstract class AbstractGradleIntegrationTest : AbstractIntegrationTest() {
+
+    abstract val versions: BuildVersions
+
+    @BeforeTest
+    fun copyTemplates() {
+        File("projects").listFiles().orEmpty()
+            .filter { it.isFile }
+            .filter { it.name.startsWith("template.") }
+            .forEach { file -> file.copyTo(File(temporaryTestFolder.root, file.name)) }
+    }
+
+    fun createGradleRunner(
+        vararg arguments: String
+    ): GradleRunner {
+        return GradleRunner.create()
+            .withProjectDir(projectDir)
+            .withGradleVersion(versions.gradleVersion.version)
+            .forwardOutput()
+            .withTestKitDir(File("build", "gradle-test-kit").absoluteFile)
+            .withArguments(
+                listOfNotNull(
+                    "-Pkotlin_version=${versions.kotlinVersion}",
+                    "-Pdokka_it_kotlin_version=${versions.kotlinVersion}",
+                    versions.androidGradlePluginVersion?.let { androidVersion ->
+                        "-Pdokka_it_android_gradle_plugin_version=$androidVersion"
+                    },
+                    * arguments
+                )
+            ).run { this as DefaultGradleRunner }
+            .withJvmArguments("-Xmx4G", "-XX:MaxMetaspaceSize=2G")
+    }
+
+    fun GradleRunner.buildRelaxed(): BuildResult {
+        return try {
+            build()
+        } catch (e: Throwable) {
+            val gradleConnectionException = e.withAllCauses().find { it is GradleConnectionException }
+            if (gradleConnectionException != null) {
+                gradleConnectionException.printStackTrace()
+                throw AssumptionViolatedException("Assumed Gradle connection", gradleConnectionException)
+
+            }
+            throw e
+        }
+    }
+}
+
+private fun Throwable.withAllCauses(): Sequence<Throwable> {
+    val root = this
+    return sequence {
+        yield(root)
+        val cause = root.cause
+        if (cause != null && cause != root) {
+            yieldAll(cause.withAllCauses())
+        }
+    }
+}
diff --git a/integration-tests/gradle/src/main/kotlin/org/jetbrains/dokka/it/gradle/BuildVersions.kt b/integration-tests/gradle/src/main/kotlin/org/jetbrains/dokka/it/gradle/BuildVersions.kt
new file mode 100644
index 00000000..84a7f1e8
--- /dev/null
+++ b/integration-tests/gradle/src/main/kotlin/org/jetbrains/dokka/it/gradle/BuildVersions.kt
@@ -0,0 +1,48 @@
+package org.jetbrains.dokka.it.gradle
+
+import org.gradle.util.GradleVersion
+
+data class BuildVersions(
+    val gradleVersion: GradleVersion,
+    val kotlinVersion: String,
+    val androidGradlePluginVersion: String? = null,
+) {
+    constructor(
+        gradleVersion: String,
+        kotlinVersion: String,
+        androidGradlePluginVersion: String? = null
+    ) : this(
+        gradleVersion = GradleVersion.version(gradleVersion),
+        kotlinVersion = kotlinVersion,
+        androidGradlePluginVersion = androidGradlePluginVersion
+    )
+
+    override fun toString(): String {
+        return buildString {
+            append("Gradle ${gradleVersion.version}, Kotlin $kotlinVersion")
+            if (androidGradlePluginVersion != null) {
+                append(", Android $androidGradlePluginVersion")
+            }
+        }
+    }
+
+    companion object {
+        fun permutations(
+            gradleVersions: List<String>,
+            kotlinVersions: List<String>,
+            androidGradlePluginVersions: List<String?> = listOf(null)
+        ): List<BuildVersions> {
+            return gradleVersions.distinct().flatMap { gradleVersion ->
+                kotlinVersions.distinct().flatMap { kotlinVersion ->
+                    androidGradlePluginVersions.distinct().map { androidVersion ->
+                        BuildVersions(
+                            gradleVersion = gradleVersion,
+                            kotlinVersion = kotlinVersion,
+                            androidGradlePluginVersion = androidVersion
+                        )
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/integration-tests/maven/build.gradle.kts b/integration-tests/maven/build.gradle.kts
new file mode 100644
index 00000000..1c747bbc
--- /dev/null
+++ b/integration-tests/maven/build.gradle.kts
@@ -0,0 +1,20 @@
+import org.jetbrains.SetupMaven
+import org.jetbrains.dependsOnMavenLocalPublication
+
+evaluationDependsOn(":runners:maven-plugin")
+
+dependencies {
+    implementation(kotlin("stdlib"))
+    implementation(kotlin("test-junit"))
+}
+
+tasks.integrationTest {
+    dependsOnMavenLocalPublication()
+
+    val setupMavenTask = project(":runners:maven-plugin").tasks.withType<SetupMaven>().single()
+    dependsOn(setupMavenTask)
+
+    val dokka_version: String by project
+    environment("DOKKA_VERSION", dokka_version)
+    environment("MVN_BINARY_PATH", setupMavenTask.mvn.absolutePath)
+}
diff --git a/integration-tests/maven/projects/it-maven/pom.xml b/integration-tests/maven/projects/it-maven/pom.xml
new file mode 100644
index 00000000..c6e0ef45
--- /dev/null
+++ b/integration-tests/maven/projects/it-maven/pom.xml
@@ -0,0 +1,172 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.jetbrains.dokka</groupId>
+    <artifactId>it-maven</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <kotlin.version>1.3.72</kotlin.version>
+    </properties>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.jetbrains.kotlin</groupId>
+                <artifactId>kotlin-maven-plugin</artifactId>
+                <version>${kotlin.version}</version>
+                <executions>
+                    <execution>
+                        <id>compile</id>
+                        <goals>
+                            <goal>compile</goal>
+                        </goals>
+                        <configuration>
+                            <sourceDirs>
+                                <sourceDir>${project.basedir}/src/main/kotlin</sourceDir>
+                                <sourceDir>${project.basedir}/src/main/java</sourceDir>
+                            </sourceDirs>
+                        </configuration>
+                    </execution>
+                    <execution>
+                        <id>test-compile</id>
+                        <goals>
+                            <goal>test-compile</goal>
+                        </goals>
+                        <configuration>
+                            <sourceDirs>
+                                <sourceDir>${project.basedir}/src/test/kotlin</sourceDir>
+                                <sourceDir>${project.basedir}/src/test/java</sourceDir>
+                            </sourceDirs>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.5.1</version>
+                <executions>
+                    <!-- Replacing default-compile as it is treated specially by maven -->
+                    <execution>
+                        <id>default-compile</id>
+                        <phase>none</phase>
+                    </execution>
+                    <!-- Replacing default-testCompile as it is treated specially by maven -->
+                    <execution>
+                        <id>default-testCompile</id>
+                        <phase>none</phase>
+                    </execution>
+                    <execution>
+                        <id>java-compile</id>
+                        <phase>compile</phase>
+                        <goals>
+                            <goal>compile</goal>
+                        </goals>
+                    </execution>
+                    <execution>
+                        <id>java-test-compile</id>
+                        <phase>test-compile</phase>
+                        <goals>
+                            <goal>testCompile</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.jetbrains.dokka</groupId>
+                <artifactId>dokka-maven-plugin</artifactId>
+                <version>$dokka_version</version>
+                <executions>
+                    <execution>
+                        <phase>pre-site</phase>
+                        <goals>
+                            <goal>dokka</goal>
+                        </goals>
+                    </execution>
+                </executions>
+                <configuration>
+
+                    <!-- Set to true to skip dokka task, default: false -->
+                    <skip>false</skip>
+
+                    <!-- Default: ${project.artifactId} -->
+                    <moduleDisplayName>Maven Integration Test Module</moduleDisplayName>
+
+                    <!-- Default: ${project.basedir}/target/dokka -->
+                    <outputDir>${project.basedir}/output</outputDir>
+
+                    <!-- Use default or set to custom path to cache directory to enable package-list caching. -->
+                    <!-- When set to default, caches stored in $USER_HOME/.cache/dokka -->
+                    <cacheRoot>default</cacheRoot>
+
+
+                    <!-- Used for linking to JDK, default: 6 -->
+                    <jdkVersion>8</jdkVersion>
+
+                    <!-- Do not output deprecated members, applies globally, can be overridden by packageOptions -->
+                    <skipDeprecated>false</skipDeprecated>
+                    <!-- Emit warnings about not documented members, applies globally, also can be overridden by packageOptions -->
+                    <reportUndocumented>true</reportUndocumented>
+                    <!-- Do not create index pages for empty packages -->
+                    <skipEmptyPackages>true</skipEmptyPackages>
+
+                    <!-- Short form list of sourceRoots, by default, set to ${project.compileSourceRoots} -->
+                    <sourceDirectories>
+                        <dir>${project.basedir}/src/main/kotlin</dir>
+                        <dir>${project.basedir}/src/main/java</dir>
+                    </sourceDirectories>
+
+
+                    <!-- Disable linking to online kotlin-stdlib documentation  -->
+                    <noStdlibLink>false</noStdlibLink>
+
+                    <!-- Disable linking to online JDK documentation -->
+                    <noJdkLink>false</noJdkLink>
+
+                    <!-- Allows to customize documentation generation options on a per-package basis -->
+                    <perPackageOptions>
+                        <packageOptions>
+                            <!-- Will match kotlin and all sub-packages of it -->
+                            <prefix>kotlin</prefix>
+
+                            <!-- All options are optional, default values are below: -->
+                            <skipDeprecated>false</skipDeprecated>
+                            <!-- Emit warnings about not documented members  -->
+                            <reportUndocumented>true</reportUndocumented>
+                            <includeNonPublic>false</includeNonPublic>
+                        </packageOptions>
+                    </perPackageOptions>
+                </configuration>
+            </plugin>
+        </plugins>
+        <sourceDirectory>${project.basedir}/src/main/kotlin</sourceDirectory>
+        <testSourceDirectory>${project.basedir}/src/test/kotlin</testSourceDirectory>
+    </build>
+
+    <pluginRepositories>
+        <pluginRepository>
+            <id>kotlin-eap</id>
+            <url>https://dl.bintray.com/kotlin/kotlin-eap/</url>
+        </pluginRepository>
+        <pluginRepository>
+            <id>kotlin-dev</id>
+            <url>https://dl.bintray.com/kotlin/kotlin-dev/</url>
+        </pluginRepository>
+        <pluginRepository>
+            <id>jcenter</id>
+            <name>JCenter</name>
+            <url>https://jcenter.bintray.com/</url>
+        </pluginRepository>
+    </pluginRepositories>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.jetbrains.kotlin</groupId>
+            <artifactId>kotlin-stdlib</artifactId>
+            <version>${kotlin.version}</version>
+        </dependency>
+    </dependencies>
+
+
+</project>
diff --git a/integration-tests/maven/projects/it-maven/src/main/java/it/basic/java/SampleJavaClass.java b/integration-tests/maven/projects/it-maven/src/main/java/it/basic/java/SampleJavaClass.java
new file mode 100644
index 00000000..e08bb66a
--- /dev/null
+++ b/integration-tests/maven/projects/it-maven/src/main/java/it/basic/java/SampleJavaClass.java
@@ -0,0 +1,22 @@
+package it.basic.java;
+
+import it.basic.PublicClass;
+
+/**
+ * This class is, unlike {@link PublicClass}, written in Java
+ */
+@SuppressWarnings("unused")
+public class SampleJavaClass {
+
+    /**
+     * @return Empty instance of {@link PublicClass}
+     */
+    public PublicClass publicDocumentedFunction() {
+        return new PublicClass();
+    }
+
+
+    public PublicClass publicUndocumentedFunction() {
+        return new PublicClass();
+    }
+}
diff --git a/integration-tests/maven/projects/it-maven/src/main/kotlin/it/basic/PublicClass.kt b/integration-tests/maven/projects/it-maven/src/main/kotlin/it/basic/PublicClass.kt
new file mode 100644
index 00000000..71bc7e63
--- /dev/null
+++ b/integration-tests/maven/projects/it-maven/src/main/kotlin/it/basic/PublicClass.kt
@@ -0,0 +1,48 @@
+@file:Suppress("unused")
+
+package it.basic
+
+class PublicClass {
+    /**
+     * This function is public and documented
+     */
+    fun publicDocumentedFunction(): String = ""
+
+    fun publicUndocumentedFunction(): String = ""
+
+    /**
+     * This function is internal and documented
+     */
+    internal fun internalDocumentedFunction(): String = ""
+
+    internal fun internalUndocumentedFunction(): String = ""
+
+    /**
+     * This function is private and documented
+     */
+    private fun privateDocumentedFunction(): String = ""
+
+    private fun privateUndocumentedFunction(): String = ""
+
+
+    /**
+     * This property is public and documented
+     */
+    val publicDocumentedProperty: Int = 0
+
+    val publicUndocumentedProperty: Int = 0
+
+    /**
+     * This property internal and documented
+     */
+    val internalDocumentedProperty: Int = 0
+
+    val internalUndocumentedProperty: Int = 0
+
+    /**
+     * This property private and documented
+     */
+    private val privateDocumentedProperty: Int = 0
+
+    private val privateUndocumentedProperty: Int = 0
+}
diff --git a/integration-tests/maven/src/integrationTest/kotlin/org/jetbrains/dokka/it/maven/MavenIntegrationTest.kt b/integration-tests/maven/src/integrationTest/kotlin/org/jetbrains/dokka/it/maven/MavenIntegrationTest.kt
new file mode 100644
index 00000000..86cc2f41
--- /dev/null
+++ b/integration-tests/maven/src/integrationTest/kotlin/org/jetbrains/dokka/it/maven/MavenIntegrationTest.kt
@@ -0,0 +1,132 @@
+package org.jetbrains.dokka.it.maven
+
+import org.jetbrains.dokka.it.AbstractIntegrationTest
+import org.jetbrains.dokka.it.awaitProcessResult
+import org.jetbrains.dokka.it.ProcessResult
+import java.io.File
+import kotlin.test.BeforeTest
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertTrue
+
+class MavenIntegrationTest : AbstractIntegrationTest() {
+
+    private val currentDokkaVersion: String = checkNotNull(System.getenv("DOKKA_VERSION"))
+
+    private val mavenBinaryFile: File = File(checkNotNull(System.getenv("MVN_BINARY_PATH")))
+
+    @BeforeTest
+    fun prepareProjectFiles() {
+        val templateProjectDir = File("projects", "it-maven")
+        templateProjectDir.copyRecursively(projectDir)
+        val pomXml = File(projectDir, "pom.xml")
+        assertTrue(pomXml.isFile)
+        pomXml.apply {
+            writeText(readText().replace("\$dokka_version", currentDokkaVersion))
+        }
+    }
+
+    @Test
+    fun `dokka dokka`() {
+        val result = ProcessBuilder().directory(projectDir)
+            .command(mavenBinaryFile.absolutePath, "dokka:dokka", "-U", "-e").start().awaitProcessResult()
+
+        diagnosticAsserts(result)
+
+        val dokkaOutputDir = File(projectDir, "output")
+        assertTrue(dokkaOutputDir.isDirectory, "Missing dokka output directory")
+
+        val imagesDir = File(dokkaOutputDir, "images")
+        assertTrue(imagesDir.isDirectory, "Missing images directory")
+
+        val scriptsDir = File(dokkaOutputDir, "scripts")
+        assertTrue(scriptsDir.isDirectory, "Missing scripts directory")
+
+        val stylesDir = File(dokkaOutputDir, "styles")
+        assertTrue(stylesDir.isDirectory, "Missing styles directory")
+
+        val navigationHtml = File(dokkaOutputDir, "navigation.html")
+        assertTrue(navigationHtml.isFile, "Missing navigation.html")
+
+        projectDir.allHtmlFiles().forEach { file ->
+            assertContainsNoErrorClass(file)
+            assertNoUnresolvedLInks(file)
+        }
+    }
+
+    @Test
+    fun `dokka javadoc`() {
+        val result = ProcessBuilder().directory(projectDir)
+            .command(mavenBinaryFile.absolutePath, "dokka:javadoc", "-U", "-e").start().awaitProcessResult()
+
+        diagnosticAsserts(result)
+
+        val dokkaOutputDir = File(projectDir, "output")
+        assertTrue(dokkaOutputDir.isDirectory, "Missing dokka output directory")
+
+        val scriptsDir = File(dokkaOutputDir, "jquery")
+        assertTrue(scriptsDir.isDirectory, "Missing jquery directory")
+
+        val stylesDir = File(dokkaOutputDir, "resources")
+        assertTrue(stylesDir.isDirectory, "Missing resources directory")
+
+        projectDir.allHtmlFiles().forEach { file ->
+            assertContainsNoErrorClass(file)
+            assertNoUnresolvedLInks(file)
+        }
+    }
+
+    @Test
+    fun `dokka javadocJar`() {
+        val result = ProcessBuilder().directory(projectDir)
+            .command(mavenBinaryFile.absolutePath, "dokka:javadocJar", "-U", "-e").start().awaitProcessResult()
+
+        diagnosticAsserts(result)
+
+        val dokkaOutputDir = File(projectDir, "output")
+        assertTrue(dokkaOutputDir.isDirectory, "Missing dokka output directory")
+
+        val scriptsDir = File(dokkaOutputDir, "jquery")
+        assertTrue(scriptsDir.isDirectory, "Missing jquery directory")
+
+        val stylesDir = File(dokkaOutputDir, "resources")
+        assertTrue(stylesDir.isDirectory, "Missing resources directory")
+
+        val dokkaTargetDir = File(projectDir, "target")
+        assertTrue(dokkaOutputDir.isDirectory, "Missing dokka target directory")
+
+        val jarFile = File(dokkaTargetDir, "it-maven-1.0-SNAPSHOT-javadoc.jar")
+        assertTrue(jarFile.isFile, "Missing dokka jar file")
+
+        projectDir.allHtmlFiles().forEach { file ->
+            assertContainsNoErrorClass(file)
+            assertNoUnresolvedLInks(file)
+        }
+    }
+
+    private fun diagnosticAsserts(result: ProcessResult) {
+        assertEquals(0, result.exitCode, "Expected exitCode 0 (Success)")
+
+        val extensionLoadedRegex = Regex("""Extension: org\.jetbrains\.dokka\.base\.DokkaBase""")
+        val amountOfExtensionsLoaded = extensionLoadedRegex.findAll(result.output).count()
+
+        assertTrue(
+            amountOfExtensionsLoaded > 10,
+            "Expected more than 10 extensions being present (found $amountOfExtensionsLoaded)"
+        )
+
+        val undocumentedReportRegex = Regex("""Undocumented:""")
+        val amountOfUndocumentedReports = undocumentedReportRegex.findAll(result.output).count()
+        assertTrue(
+            amountOfUndocumentedReports > 0,
+            "Expected at least one report of undocumented code (found $amountOfUndocumentedReports)"
+        )
+
+        val undocumentedJavaReportRegex = Regex("""Undocumented: it\.basic\.java""")
+        val amountOfUndocumentedJavaReports = undocumentedJavaReportRegex.findAll(result.output).count()
+        assertTrue(
+            amountOfUndocumentedJavaReports > 0,
+            "Expected at least one report of undocumented java code (found $amountOfUndocumentedJavaReports)"
+        )
+    }
+}
diff --git a/integration-tests/src/main/kotlin/org/jetbrains/dokka/it/AbstractIntegrationTest.kt b/integration-tests/src/main/kotlin/org/jetbrains/dokka/it/AbstractIntegrationTest.kt
new file mode 100644
index 00000000..aeebe552
--- /dev/null
+++ b/integration-tests/src/main/kotlin/org/jetbrains/dokka/it/AbstractIntegrationTest.kt
@@ -0,0 +1,71 @@
+package org.jetbrains.dokka.it
+
+import org.jsoup.Jsoup
+import org.junit.Rule
+import org.junit.rules.TemporaryFolder
+import java.io.File
+import kotlin.test.assertFalse
+import kotlin.test.assertTrue
+
+abstract class AbstractIntegrationTest {
+
+    @get:Rule
+    val temporaryTestFolder = TemporaryFolder()
+
+    val projectDir get() = File(temporaryTestFolder.root, "project")
+
+    fun File.allDescendentsWithExtension(extension: String): Sequence<File> {
+        return this.walkTopDown().filter { it.isFile && it.extension == extension }
+    }
+
+    fun File.allHtmlFiles(): Sequence<File> {
+        return allDescendentsWithExtension("html")
+    }
+
+    protected fun assertContainsNoErrorClass(file: File) {
+        val fileText = file.readText()
+        assertFalse(
+            fileText.contains("ERROR CLASS", ignoreCase = true),
+            "Unexpected `ERROR CLASS` in ${file.path}\n" + fileText
+        )
+    }
+
+    protected fun assertNoUnresolvedLInks(file: File) {
+        val regex = Regex("[\"']#[\"']")
+        val fileText = file.readText()
+        assertFalse(
+            fileText.contains(regex),
+            "Unexpected unresolved link in ${file.path}\n" + fileText
+        )
+    }
+
+    protected fun assertNoHrefToMissingLocalFileOrDirectory(
+        file: File, fileExtensions: Set<String> = setOf("html")
+    ) {
+        val fileText = file.readText()
+        val html = Jsoup.parse(fileText)
+        html.allElements.toList().forEach { element ->
+            val href = (element.attr("href") ?: return@forEach)
+            if (href.startsWith("https")) return@forEach
+            if (href.startsWith("http")) return@forEach
+
+            val hrefWithoutAnchors = if (href.contains("#")) {
+                val hrefSplits = href.split("#")
+                if (hrefSplits.count() != 2) return@forEach
+                hrefSplits.first()
+            } else href
+
+            val targetFile = File(file.parent, hrefWithoutAnchors)
+            if (targetFile.extension.isNotEmpty() && targetFile.extension !in fileExtensions) return@forEach
+
+            if (
+                targetFile.extension.isEmpty() || targetFile.extension == "html" && !href.startsWith("#")) {
+                assertTrue(
+                    targetFile.exists(),
+                    "${file.relativeTo(projectDir).path}: href=\"$href\"\n" +
+                            "file does not exist: ${targetFile.relativeTo(projectDir).path}"
+                )
+            }
+        }
+    }
+}
diff --git a/integration-tests/src/main/kotlin/org/jetbrains/dokka/it/environmentUtils.kt b/integration-tests/src/main/kotlin/org/jetbrains/dokka/it/environmentUtils.kt
new file mode 100644
index 00000000..eadf5a8c
--- /dev/null
+++ b/integration-tests/src/main/kotlin/org/jetbrains/dokka/it/environmentUtils.kt
@@ -0,0 +1,16 @@
+package org.jetbrains.dokka.it
+
+import java.io.File
+
+/**
+ * Indicating whether or not the current machine executing the test is a CI
+ */
+val isCI: Boolean get() = System.getenv("CI") == "true"
+
+val isAndroidSdkInstalled: Boolean = System.getenv("ANDROID_SDK_ROOT") != null ||
+        System.getenv("ANDROID_HOME") != null
+
+val isMavenInstalled: Boolean = System.getenv("PATH").orEmpty()
+    .split(File.pathSeparator)
+    .flatMap { pathElement -> File(pathElement).listFiles().orEmpty().toList() }
+    .any { pathElement -> "mvn" == pathElement.name }
diff --git a/integration-tests/src/main/kotlin/org/jetbrains/dokka/it/processUtils.kt b/integration-tests/src/main/kotlin/org/jetbrains/dokka/it/processUtils.kt
new file mode 100644
index 00000000..d2c048ac
--- /dev/null
+++ b/integration-tests/src/main/kotlin/org/jetbrains/dokka/it/processUtils.kt
@@ -0,0 +1,51 @@
+package org.jetbrains.dokka.it
+
+import kotlinx.coroutines.CompletableDeferred
+import kotlinx.coroutines.async
+import kotlinx.coroutines.runBlocking
+import kotlin.concurrent.thread
+
+class ProcessResult(
+    val exitCode: Int,
+    val output: String
+)
+
+fun Process.awaitProcessResult() = runBlocking {
+    val exitCode = async { awaitExitCode() }
+    val output = async { awaitOutput() }
+    ProcessResult(
+        exitCode.await(),
+        output.await()
+    )
+}
+
+private suspend fun Process.awaitExitCode(): Int {
+    val deferred = CompletableDeferred<Int>()
+    thread {
+        try {
+            deferred.complete(this.waitFor())
+        } catch (e: Throwable) {
+            deferred.completeExceptionally(e)
+        }
+    }
+
+    return deferred.await()
+}
+
+private suspend fun Process.awaitOutput(): String {
+    val deferred = CompletableDeferred<String>()
+    thread {
+        try {
+            var string = ""
+            this.inputStream.bufferedReader().forEachLine { line ->
+                println(line)
+                string += line + System.lineSeparator()
+            }
+            deferred.complete(string)
+        } catch (e: Throwable) {
+            deferred.completeExceptionally(e)
+        }
+    }
+
+    return deferred.await()
+}