test DGPv2 examples

build-logic/src/main/kotlin/dokkabuild/utils/SystemPropertyAdder.kt

@@ -4,14 +4,14 @@
 package dokkabuild.utils
 
 import org.gradle.api.file.Directory
-import org.gradle.api.file.DirectoryProperty
 import org.gradle.api.file.FileCollection
 import org.gradle.api.file.RegularFile
 import org.gradle.api.model.ObjectFactory
 import org.gradle.api.provider.Provider
 import org.gradle.api.tasks.Input
 import org.gradle.api.tasks.TaskInputFilePropertyBuilder
 import org.gradle.api.tasks.TaskInputPropertyBuilder
+import org.gradle.api.tasks.TaskOutputFilePropertyBuilder
 import org.gradle.api.tasks.testing.Test
 import org.gradle.kotlin.dsl.create
 import org.gradle.kotlin.dsl.findByType
@@ -39,9 +39,10 @@ abstract class SystemPropertyAdder @Inject internal constructor(
 ) {
     private val objects: ObjectFactory = task.project.objects
 
+    @JvmName("inputDirectoryProvider")
     fun inputDirectory(
         key: String,
-        value: DirectoryProperty,
+        value: Provider<out Directory>,
     ): TaskInputFilePropertyBuilder {
         task.jvmArgumentProviders.add(
             SystemPropertyArgumentProvider(key, value) {
@@ -52,18 +53,59 @@ abstract class SystemPropertyAdder @Inject internal constructor(
             .withPropertyName("SystemProperty input directory $key")
     }
 
+    @JvmName("inputDirectoryFile")
     fun inputDirectory(
         key: String,
         value: Provider<File>,
     ): TaskInputFilePropertyBuilder =
         inputDirectory(key, objects.directoryProperty().fileProvider(value))
 
+    fun inputDirectory(
+        key: String,
+        value: File,
+    ): TaskInputFilePropertyBuilder =
+        inputDirectory(key, objects.directoryProperty().fileValue(value))
+
     fun inputDirectory(
         key: String,
         value: Directory,
     ): TaskInputFilePropertyBuilder =
         inputDirectory(key, objects.directoryProperty().apply { set(value) })
 
+
+    @JvmName("outputDirectoryProvider")
+    fun outputDirectory(
+        key: String,
+        value: Provider<out Directory>,
+    ): TaskOutputFilePropertyBuilder {
+        task.jvmArgumentProviders.add(
+            SystemPropertyArgumentProvider(key, value) {
+                it.get().asFile.invariantSeparatorsPath
+            }
+        )
+        return task.outputs.dir(value)
+            .withPropertyName("SystemProperty input directory $key")
+    }
+
+    @JvmName("outputDirectoryFile")
+    fun outputDirectory(
+        key: String,
+        value: Provider<File>,
+    ): TaskOutputFilePropertyBuilder =
+        outputDirectory(key, objects.directoryProperty().fileProvider(value))
+
+    fun outputDirectory(
+        key: String,
+        value: File,
+    ): TaskOutputFilePropertyBuilder =
+        outputDirectory(key, objects.directoryProperty().fileValue(value))
+
+    fun outputDirectory(
+        key: String,
+        value: Directory,
+    ): TaskOutputFilePropertyBuilder =
+        outputDirectory(key, objects.directoryProperty().apply { set(value) })
+
     fun inputFile(
         key: String,
         file: RegularFile,

build.gradle.kts

@@ -119,6 +119,8 @@ idea {
                 "dokka-runners/runner-cli/.kotlin",
                 "dokka-runners/runner-maven-plugin/.kotlin",
                 "dokka-runners/dokka-gradle-plugin/src/testFunctional/resources/KotlinDslAccessorsTest/",
+
+                "dokka-integration-tests/gradle/src/testExampleProjects/expectedData",
             )
         )
     }

dokka-integration-tests/gradle/build.gradle.kts

@@ -12,9 +12,13 @@ plugins {
     id("dokkabuild.kotlin-jvm")
     id("dokkabuild.test-integration")
     id("dokkabuild.dev-maven-publish")
+    `java-test-fixtures`
+    alias(libs.plugins.kotlinxSerialization)
 }
 
 dependencies {
+    val dokkaVersion = project.version.toString()
+
     api(projects.utilities)
 
     api(libs.jsoup)
@@ -25,7 +29,22 @@ dependencies {
 
     api(gradleTestKit())
 
-    val dokkaVersion = project.version.toString()
+    testFixturesApi(libs.kotlin.test)
+    testFixturesApi(libs.junit.jupiterApi)
+    testFixturesApi(libs.junit.jupiterParams)
+
+    testFixturesApi(gradleTestKit())
+
+    testFixturesApi(testFixtures("org.jetbrains.dokka:dokka-gradle-plugin:$dokkaVersion"))
+    testFixturesApi(platform(libs.kotest.bom))
+    testFixturesApi(libs.kotest.assertionsCore)
+    testFixturesApi(libs.kotest.assertionsJson)
+
+    testFixturesImplementation(platform(libs.kotlinxSerialization.bom))
+    testFixturesImplementation(libs.kotlinxSerialization.json)
+
+    testImplementation(testFixtures(project))
+
     // We're using Gradle included-builds and dependency substitution, so we
     // need to use the Gradle project name, *not* the published Maven artifact-id
     devPublication("org.jetbrains.dokka:plugin-all-modules-page:$dokkaVersion")
@@ -64,6 +83,7 @@ tasks.withType<Test>().configureEach {
     systemProperty("hostGradleUserHome", gradle.gradleUserHomeDir.invariantSeparatorsPath)
 }
 
+
 val templateSettingsGradleKts = layout.projectDirectory.file("projects/template.settings.gradle.kts")
 val templateProjectsDir = layout.projectDirectory.dir("projects")
 
@@ -155,8 +175,6 @@ fun registerTestProjectSuite(
                     .inputFile("templateSettingsGradleKts", templateSettingsGradleKts)
                     .withPathSensitivity(NAME_ONLY)
 
-                devMavenPublish.configureTask(this)
-
                 if (jvm != null) {
                     javaLauncher = javaToolchains.launcherFor { languageVersion = jvm }
                 }
@@ -177,3 +195,36 @@ val checkoutKotlinxSerialization by tasks.registering(GitCheckoutTask::class) {
     commitId = "ed1b05707ec27f8864c8b42235b299bdb5e0015c"
     destination = templateProjectsDir.dir("serialization/kotlinx-serialization")
 }
+
+testing {
+    suites.withType<JvmTestSuite>().configureEach {
+        dependencies {
+            implementation(testFixtures(project()))
+        }
+        targets.configureEach {
+            testTask.configure {
+                devMavenPublish.configureTask(this)
+            }
+        }
+    }
+    val testExampleProjects by suites.registering(JvmTestSuite::class) {
+        targets.configureEach {
+            testTask.configure {
+
+                val exampleGradleProjectsDir = projectDir.resolve("../../examples/gradle-v2")
+                systemProperty
+                    .inputDirectory("exampleGradleProjectsDir", exampleGradleProjectsDir)
+                    .withPathSensitivity(RELATIVE)
+
+                val expectedDataDir = layout.projectDirectory.dir("src/testExampleProjects/expectedData")
+                systemProperty
+                    .inputDirectory("expectedDataDir", expectedDataDir)
+                    .withPathSensitivity(RELATIVE)
+            }
+        }
+    }
+}
+
+tasks.check {
+    dependsOn(testing.suites)
+}