Re-implement first basic gradle integration test

17 files changed, 647 insertions, 12 deletions

diff --git a/integration-tests/gradle-integration-tests/build.gradle.kts b/integration-tests/gradle-integration-tests/build.gradle.kts
index 7cb96738..4db0f976 100644
--- a/integration-tests/gradle-integration-tests/build.gradle.kts
+++ b/integration-tests/gradle-integration-tests/build.gradle.kts
@@ -40,6 +40,5 @@ tasks {
     test {
         systemProperty("android.licenses.overwrite", project.findProperty("android.licenses.overwrite") ?: "")
         inputs.dir(file("testData"))
-        exclude("*") // TODO: Remove this exclude when tests are migrated
     }
 }
diff --git a/integration-tests/gradle-integration-tests/src/test/kotlin/org/jetbrains/dokka/gradle/BasicTest.kt b/integration-tests/gradle-integration-tests/src/test/kotlin/org/jetbrains/dokka/gradle/BasicTest.kt
index 2e1a0d41..38516b48 100644
--- a/integration-tests/gradle-integration-tests/src/test/kotlin/org/jetbrains/dokka/gradle/BasicTest.kt
+++ b/integration-tests/gradle-integration-tests/src/test/kotlin/org/jetbrains/dokka/gradle/BasicTest.kt
@@ -37,15 +37,24 @@ class BasicTest : AbstractDokkaGradleTest() {
                 """<a href="https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html"><span class="identifier">String</span></a>""")
     }
 
-    @Test fun `test kotlin 1_0_7 and gradle 2_14_1`() {
-        doTest("2.14.1", "1.0.7")
+    @Test
+    fun `test gradle 6_5_1 kotlin 1_3_72`() {
+        doTest(gradleVersion = "6.5.1", kotlinVersion = "1.3.72")
     }
 
-    @Test fun `test kotlin 1_1_2 and gradle 4_0`() {
-        doTest("4.0", "1.1.2")
+    @Test
+    fun  `test gradle 6_5_0 kotlin 1_3_72`() {
+        doTest(gradleVersion = "6.5.0", kotlinVersion = "1.3.72")
     }
 
-    @Test fun `test kotlin 1_2_20 and gradle 4_5`() {
-        doTest("4.5", "1.2.20")
+    @Test
+    fun  `test gradle 5_6_4 kotlin 1_3_72`() {
+        doTest(gradleVersion = "5.6.4", kotlinVersion = "1.3.72")
     }
-}
\ No newline at end of file
+
+    @Test
+    fun  `test gradle 5_6_4 kotlin 1_3_30`() {
+        doTest(gradleVersion = "5.6.4", kotlinVersion = "1.3.30")
+    }
+
+}
diff --git a/integration-tests/gradle-integration-tests/testData/basic/build.gradle b/integration-tests/gradle-integration-tests/testData/basic/build.gradle
index 79645204..18c617b7 100644
--- a/integration-tests/gradle-integration-tests/testData/basic/build.gradle
+++ b/integration-tests/gradle-integration-tests/testData/basic/build.gradle
@@ -2,7 +2,8 @@ buildscript {
     repositories {
         mavenCentral()
         jcenter()
-        maven { url "https://dl.bintray.com/kotlin/kotlin-eap-1.1" }
+        mavenLocal()
+        maven { url "https://dl.bintray.com/kotlin/kotlin-eap" }
         maven { url "https://dl.bintray.com/kotlin/kotlin-dev" }
     }
     dependencies {
@@ -21,7 +22,7 @@ repositories {
     mavenCentral()
     jcenter()
     maven {
-        url "https://dl.bintray.com/kotlin/kotlin-eap-1.1"
+        url "https://dl.bintray.com/kotlin/kotlin-eap"
     }
     maven {
         url "https://dl.bintray.com/kotlin/kotlin-dev"
@@ -35,8 +36,11 @@ dependencies {
 }
 
 
+/*
 dokka {
     configuration {
         classpath += "$projectDir/classDir"
     }
-}
\ No newline at end of file
+}
+
+ */
diff --git a/integration-tests/gradle-integration-tests/testData/basic/settings.gradle b/integration-tests/gradle-integration-tests/testData/basic/settings.gradle
index c36a146c..a0498790 100644
--- a/integration-tests/gradle-integration-tests/testData/basic/settings.gradle
+++ b/integration-tests/gradle-integration-tests/testData/basic/settings.gradle
@@ -1 +1,11 @@
-rootProject.name = "basic"
\ No newline at end of file
+pluginManagement {
+    repositories {
+        maven { url 'https://dl.bintray.com/kotlin/kotlin-dev/' }
+        mavenLocal()
+        mavenCentral()
+        jcenter()
+        gradlePluginPortal()
+    }
+}
+
+rootProject.name = "basic"
diff --git a/integration-tests/gradle/build.gradle.kts b/integration-tests/gradle/build.gradle.kts
new file mode 100644
index 00000000..3f5baa7b
--- /dev/null
+++ b/integration-tests/gradle/build.gradle.kts
@@ -0,0 +1,14 @@
+dependencies {
+    implementation(kotlin("stdlib"))
+    implementation(kotlin("test-junit"))
+    implementation(gradleTestKit())
+}
+
+tasks {
+    test {
+        inputs.dir(file("projects"))
+        rootProject.allprojects
+            .mapNotNull { project -> project.tasks.findByName("publishToMavenLocal") }
+            .forEach { publishTask -> this.dependsOn(publishTask) }
+    }
+}
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..69e469bc
--- /dev/null
+++ b/integration-tests/gradle/projects/it-basic/build.gradle.kts
@@ -0,0 +1,22 @@
+import org.jetbrains.dokka.gradle.dokka
+
+plugins {
+    kotlin("jvm")
+    id("org.jetbrains.dokka")
+}
+
+repositories {
+    maven("https://dl.bintray.com/kotlin/kotlin-dev/")
+    jcenter()
+    mavenLocal()
+    mavenCentral()
+}
+
+dependencies {
+    implementation(kotlin("stdlib"))
+}
+
+afterEvaluate {
+    logger.quiet("Kotlin version: ${KotlinVersion.CURRENT}")
+    logger.quiet("Gradle version: ${gradle.gradleVersion}")
+}
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..625ff49c
--- /dev/null
+++ b/integration-tests/gradle/projects/it-basic/gradle.properties
@@ -0,0 +1,2 @@
+kotlin_version=1.4-M2-eap-70
+dokka_version=0.11.0-SNAPSHOT
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..4ee17dee
--- /dev/null
+++ b/integration-tests/gradle/projects/it-basic/settings.gradle.kts
@@ -0,0 +1,28 @@
+@file:Suppress("LocalVariableName", "UnstableApiUsage")
+
+pluginManagement {
+    val kotlin_version: String by settings
+    val dokka_version: String by settings
+
+    plugins {
+        id("org.jetbrains.kotlin.jvm") version kotlin_version
+    }
+
+    resolutionStrategy {
+        eachPlugin {
+            if (requested.id.id == "org.jetbrains.dokka") {
+                useModule("org.jetbrains.dokka:dokka-gradle-plugin:$dokka_version")
+            }
+        }
+    }
+
+    repositories {
+        maven("https://dl.bintray.com/kotlin/kotlin-dev/")
+        mavenLocal()
+        mavenCentral()
+        jcenter()
+        gradlePluginPortal()
+    }
+}
+
+rootProject.name = "it-basic"
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/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..271720fe
--- /dev/null
+++ b/integration-tests/gradle/src/main/kotlin/org/jetbrains/dokka/it/gradle/AbstractGradleIntegrationTest.kt
@@ -0,0 +1,49 @@
+package org.jetbrains.dokka.it.gradle
+
+import org.gradle.testkit.runner.GradleRunner
+import org.junit.Rule
+import org.junit.rules.TemporaryFolder
+import java.io.File
+import kotlin.test.assertFalse
+import kotlin.test.assertTrue
+
+abstract class AbstractGradleIntegrationTest {
+
+    @get:Rule
+    val projectTemporaryFolder = TemporaryFolder()
+
+    val projectPath get() = projectTemporaryFolder.root.toPath()
+
+    val projectDir get() = projectTemporaryFolder.root
+
+
+    fun createGradleRunner(
+        buildVersions: BuildVersions, arguments: Array<String>
+    ): GradleRunner {
+        return GradleRunner.create()
+            .withProjectDir(projectDir)
+            .withGradleVersion(buildVersions.gradleVersion)
+            .forwardOutput()
+            .withArguments("-Pkotlin_version=${buildVersions.kotlinVersion}", *arguments)
+            .withDebug(true)
+
+    }
+
+    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
+        )
+    }
+}
+
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..6aa41e7a
--- /dev/null
+++ b/integration-tests/gradle/src/main/kotlin/org/jetbrains/dokka/it/gradle/BuildVersions.kt
@@ -0,0 +1,6 @@
+package org.jetbrains.dokka.it.gradle
+
+data class BuildVersions(
+    val gradleVersion: String,
+    val kotlinVersion: String
+)
diff --git a/integration-tests/gradle/src/main/kotlin/org/jetbrains/dokka/it/gradle/utils.kt b/integration-tests/gradle/src/main/kotlin/org/jetbrains/dokka/it/gradle/utils.kt
new file mode 100644
index 00000000..2516b151
--- /dev/null
+++ b/integration-tests/gradle/src/main/kotlin/org/jetbrains/dokka/it/gradle/utils.kt
@@ -0,0 +1,29 @@
+package org.jetbrains.dokka.it.gradle
+
+import java.io.IOException
+import java.nio.file.*
+import java.nio.file.attribute.BasicFileAttributes
+
+fun Path.copy(to: Path) {
+    Files.walkFileTree(this, CopyFileVisitor(this, to))
+}
+
+class CopyFileVisitor(private var sourcePath: Path, private val targetPath: Path) : SimpleFileVisitor<Path>() {
+    @Throws(IOException::class)
+    override fun preVisitDirectory(
+        dir: Path,
+        attrs: BasicFileAttributes
+    ): FileVisitResult {
+        Files.createDirectories(targetPath.resolve(sourcePath.relativize(dir)))
+        return FileVisitResult.CONTINUE
+    }
+
+    @Throws(IOException::class)
+    override fun visitFile(
+        file: Path,
+        attrs: BasicFileAttributes
+    ): FileVisitResult {
+        Files.copy(file, targetPath.resolve(sourcePath.relativize(file)), StandardCopyOption.REPLACE_EXISTING)
+        return FileVisitResult.CONTINUE
+    }
+}
diff --git a/integration-tests/gradle/src/test/kotlin/org/jetbrains/dokka/it/gradle/BasicTest.kt b/integration-tests/gradle/src/test/kotlin/org/jetbrains/dokka/it/gradle/BasicTest.kt
new file mode 100644
index 00000000..deba4a16
--- /dev/null
+++ b/integration-tests/gradle/src/test/kotlin/org/jetbrains/dokka/it/gradle/BasicTest.kt
@@ -0,0 +1,121 @@
+package org.jetbrains.dokka.it.gradle
+
+import org.gradle.testkit.runner.TaskOutcome
+import java.io.File
+import kotlin.test.*
+
+class BasicTest : AbstractGradleIntegrationTest() {
+
+    @Test
+    fun `gradle 5_6_4 kotlin 1_3_72`() {
+        execute(
+            BuildVersions(
+                gradleVersion = "5.6.4",
+                kotlinVersion = "1.3.72"
+            )
+        )
+    }
+
+    @Test
+    fun `gradle 5_6_4 kotlin 1_3_30`() {
+        execute(
+            BuildVersions(
+                gradleVersion = "5.6.4",
+                kotlinVersion = "1.3.30"
+            )
+        )
+    }
+
+    @Test
+    fun `gradle 5_6_4 kotlin 1_4_M2_eap_70`() {
+        execute(
+            BuildVersions(
+                gradleVersion = "5.6.4",
+                kotlinVersion = "1.4-M2-eap-70"
+            )
+        )
+    }
+
+    @Test
+    fun `gradle 6_1_1 kotlin 1_3_72`() {
+        execute(
+            BuildVersions(
+                gradleVersion = "6.1.1",
+                kotlinVersion = "1.3.72"
+            )
+        )
+    }
+
+    @Test
+    fun `gradle 6_5_1 kotlin 1_4_M2_eap_70`() {
+        execute(
+            BuildVersions(
+                gradleVersion = "6.5.1",
+                kotlinVersion = "1.4-M2-eap-70"
+            )
+        )
+    }
+
+    @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 `gradle 6_5_1 kotlin 1_3_72`() {
+        execute(
+            BuildVersions(
+                gradleVersion = "6.5.1",
+                kotlinVersion = "1.3.72"
+            )
+        )
+    }
+
+    private fun execute(versions: BuildVersions) {
+        val result = createGradleRunner(
+            buildVersions = versions,
+            arguments = arrayOf("dokka", "--stacktrace")
+        ).build()
+        assertEquals(TaskOutcome.SUCCESS, assertNotNull(result.task(":dokka")).outcome)
+
+        val dokkaOutputDir = File(projectDir, "build/dokka")
+        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")
+
+        val moduleOutputDir = File(dokkaOutputDir, "it-basic")
+        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 module package directory")
+
+        val modulePackageIndexHtml = File(modulePackageDir, "index.html")
+        assertTrue(modulePackageIndexHtml.isFile, "Missing module package index.html")
+
+        dokkaOutputDir.walkTopDown()
+            .filter { file -> file.extension == "html" }
+            .forEach { file ->
+                assertContainsNoErrorClass(file)
+                assertNoUnresolvedLInks(file)
+            }
+    }
+}