Add basic multiplatform gradle integration test

5 files changed, 95 insertions, 22 deletions

diff --git a/integration-tests/gradle/src/main/kotlin/org/jetbrains/dokka/it/gradle/AbstractDefaultVersionsGradleIntegrationTest.kt b/integration-tests/gradle/src/main/kotlin/org/jetbrains/dokka/it/gradle/AbstractDefaultVersionsGradleIntegrationTest.kt
index b7f44a4c..80737129 100644
--- a/integration-tests/gradle/src/main/kotlin/org/jetbrains/dokka/it/gradle/AbstractDefaultVersionsGradleIntegrationTest.kt
+++ b/integration-tests/gradle/src/main/kotlin/org/jetbrains/dokka/it/gradle/AbstractDefaultVersionsGradleIntegrationTest.kt
@@ -1,14 +1,30 @@
 package org.jetbrains.dokka.it.gradle
 
+import org.gradle.util.GradleVersion
+import org.junit.Assume
 import org.junit.Test
 
-abstract class AbstractDefaultVersionsGradleIntegrationTest : AbstractGradleIntegrationTest() {
+abstract class AbstractDefaultVersionsGradleIntegrationTest(
+    private val minGradleVersion: GradleVersion? = null,
+    private val maxGradleVersion: GradleVersion? = null
+) : AbstractGradleIntegrationTest() {
 
     protected abstract fun execute(versions: BuildVersions)
 
+    private fun executeIfRequirementsAreMet(versions: BuildVersions) {
+        if (minGradleVersion != null) {
+            Assume.assumeTrue(versions.gradleVersion >= minGradleVersion)
+        }
+        if (maxGradleVersion != null) {
+            Assume.assumeTrue(versions.gradleVersion <= maxGradleVersion)
+        }
+
+        execute(versions )
+    }
+
     @Test
-    fun `gradle 5_6_4 kotlin 1_3_72`() {
-        execute(
+    open fun `gradle 5_6_4 kotlin 1_3_72`() {
+        executeIfRequirementsAreMet(
             BuildVersions(
                 gradleVersion = "5.6.4",
                 kotlinVersion = "1.3.72"
@@ -17,8 +33,8 @@ abstract class AbstractDefaultVersionsGradleIntegrationTest : AbstractGradleInte
     }
 
     @Test
-    fun `gradle 5_6_4 kotlin 1_3_30`() {
-        execute(
+    open fun `gradle 5_6_4 kotlin 1_3_30`() {
+        executeIfRequirementsAreMet(
             BuildVersions(
                 gradleVersion = "5.6.4",
                 kotlinVersion = "1.3.30"
@@ -27,8 +43,8 @@ abstract class AbstractDefaultVersionsGradleIntegrationTest : AbstractGradleInte
     }
 
     @Test
-    fun `gradle 5_6_4 kotlin 1_4_M2_eap_70`() {
-        execute(
+    open fun `gradle 5_6_4 kotlin 1_4_M2_eap_70`() {
+        executeIfRequirementsAreMet(
             BuildVersions(
                 gradleVersion = "5.6.4",
                 kotlinVersion = "1.4-M2-eap-70"
@@ -37,8 +53,8 @@ abstract class AbstractDefaultVersionsGradleIntegrationTest : AbstractGradleInte
     }
 
     @Test
-    fun `gradle 6_1_1 kotlin 1_3_72`() {
-        execute(
+    open fun `gradle 6_1_1 kotlin 1_3_72`() {
+        executeIfRequirementsAreMet(
             BuildVersions(
                 gradleVersion = "6.1.1",
                 kotlinVersion = "1.3.72"
@@ -47,8 +63,8 @@ abstract class AbstractDefaultVersionsGradleIntegrationTest : AbstractGradleInte
     }
 
     @Test
-    fun `gradle 6_5_1 kotlin 1_4_M2_eap_70`() {
-        execute(
+    open fun `gradle 6_5_1 kotlin 1_4_M2_eap_70`() {
+        executeIfRequirementsAreMet(
             BuildVersions(
                 gradleVersion = "6.5.1",
                 kotlinVersion = "1.4-M2-eap-70"
@@ -57,8 +73,8 @@ abstract class AbstractDefaultVersionsGradleIntegrationTest : AbstractGradleInte
     }
 
     @Test
-    fun `gradle 6_5_1 kotlin 1_3_72`() {
-        execute(
+    open fun `gradle 6_5_1 kotlin 1_3_72`() {
+        executeIfRequirementsAreMet(
             BuildVersions(
                 gradleVersion = "6.5.1",
                 kotlinVersion = "1.3.72"
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
index 2efb9c55..e6b6b0eb 100644
--- 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
@@ -29,7 +29,7 @@ abstract class AbstractGradleIntegrationTest {
     ): GradleRunner {
         return GradleRunner.create()
             .withProjectDir(projectDir)
-            .withGradleVersion(buildVersions.gradleVersion)
+            .withGradleVersion(buildVersions.gradleVersion.version)
             .forwardOutput()
             .withArguments(
                 "-Pkotlin_version=${buildVersions.kotlinVersion}",
@@ -40,6 +40,14 @@ abstract class AbstractGradleIntegrationTest {
 
     }
 
+    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(
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
index 6aa41e7a..2fdd0368 100644
--- 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
@@ -1,6 +1,16 @@
 package org.jetbrains.dokka.it.gradle
 
+import org.gradle.util.GradleVersion
+
 data class BuildVersions(
-    val gradleVersion: String,
+    val gradleVersion: GradleVersion,
     val kotlinVersion: String
-)
+) {
+    constructor(
+        gradleVersion: String,
+        kotlinVersion: String
+    ) : this(
+        gradleVersion = GradleVersion.version(gradleVersion),
+        kotlinVersion = kotlinVersion
+    )
+}
diff --git a/integration-tests/gradle/src/test/kotlin/org/jetbrains/dokka/it/gradle/BasicGradleIntegrationTest.kt b/integration-tests/gradle/src/test/kotlin/org/jetbrains/dokka/it/gradle/BasicGradleIntegrationTest.kt
index b697f2a1..b4d9e82c 100644
--- a/integration-tests/gradle/src/test/kotlin/org/jetbrains/dokka/it/gradle/BasicGradleIntegrationTest.kt
+++ b/integration-tests/gradle/src/test/kotlin/org/jetbrains/dokka/it/gradle/BasicGradleIntegrationTest.kt
@@ -54,11 +54,9 @@ class BasicGradleIntegrationTest : AbstractDefaultVersionsGradleIntegrationTest(
         val moduleJavaPackageDir = File(moduleOutputDir, "it.basic.java")
         assertTrue(moduleJavaPackageDir.isDirectory, "Missing it.basic.java package directory")
 
-        dokkaOutputDir.walkTopDown()
-            .filter { file -> file.extension == "html" }
-            .forEach { file ->
-                assertContainsNoErrorClass(file)
-                assertNoUnresolvedLInks(file)
-            }
+        dokkaOutputDir.allHtmlFiles().forEach { file ->
+            assertContainsNoErrorClass(file)
+            assertNoUnresolvedLInks(file)
+        }
     }
 }
diff --git a/integration-tests/gradle/src/test/kotlin/org/jetbrains/dokka/it/gradle/Multiplatform0GradleIntegrationTest.kt b/integration-tests/gradle/src/test/kotlin/org/jetbrains/dokka/it/gradle/Multiplatform0GradleIntegrationTest.kt
new file mode 100644
index 00000000..a0f6be24
--- /dev/null
+++ b/integration-tests/gradle/src/test/kotlin/org/jetbrains/dokka/it/gradle/Multiplatform0GradleIntegrationTest.kt
@@ -0,0 +1,41 @@
+package org.jetbrains.dokka.it.gradle
+
+import org.gradle.testkit.runner.TaskOutcome
+import org.gradle.util.GradleVersion
+import java.io.File
+import kotlin.test.BeforeTest
+import kotlin.test.assertEquals
+import kotlin.test.assertNotNull
+import kotlin.test.assertTrue
+
+class Multiplatform0GradleIntegrationTest : AbstractDefaultVersionsGradleIntegrationTest(
+    minGradleVersion = GradleVersion.version("6.0.0")
+) {
+
+    @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"))
+    }
+
+    override 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")
+
+        dokkaOutputDir.allHtmlFiles().forEach { file ->
+            assertContainsNoErrorClass(file)
+            assertNoUnresolvedLInks(file)
+        }
+    }
+
+}