[Gradle] Implement KotlinMultiplatformSourceSetConventionsTest

^KT-58676 Verification Pending

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/dsl/KotlinMultiplatformSourceSetConventions.kt

@@ -59,9 +59,7 @@ interface KotlinMultiplatformSourceSetConventions {
 
     fun NamedDomainObjectProvider<KotlinSourceSet>.dependencies(
         handler: KotlinDependencyHandler.() -> Unit,
-    ) = configure { sourceSet ->
-        sourceSet.dependencies(handler)
-    }
+    ) = get().dependencies(handler)
 
     fun NamedDomainObjectProvider<KotlinSourceSet>.languageSettings(
         configure: LanguageSettingsBuilder.() -> Unit,

libraries/tools/kotlin-gradle-plugin/src/functionalTest/kotlin/org/jetbrains/kotlin/gradle/unitTests/KotlinMultiplatformSourceSetConventionsTest.kt

@@ -0,0 +1,95 @@
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+@file:Suppress("FunctionName")
+
+package org.jetbrains.kotlin.gradle.unitTests
+
+import org.gradle.kotlin.dsl.provideDelegate
+import org.jetbrains.kotlin.gradle.dsl.multiplatformExtension
+import org.jetbrains.kotlin.gradle.plugin.KotlinSourceSet
+import org.jetbrains.kotlin.gradle.plugin.configurationResult
+import org.jetbrains.kotlin.gradle.plugin.sources.internal
+import org.jetbrains.kotlin.gradle.util.assertContainsDependencies
+import org.jetbrains.kotlin.gradle.util.buildProjectWithMPP
+import org.jetbrains.kotlin.gradle.util.runLifecycleAwareTest
+import org.jetbrains.kotlin.tooling.core.extrasReadWriteProperty
+import java.util.concurrent.atomic.AtomicBoolean
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertFalse
+
+class KotlinMultiplatformSourceSetConventionsTest {
+    private var KotlinSourceSet.testMarker by extrasReadWriteProperty<String>("testMarker")
+
+    @Test
+    fun `test - invoke`() = buildProjectWithMPP().runLifecycleAwareTest {
+
+        val mainConfigurationCalled = AtomicBoolean(false)
+        val testConfigurationCalled = AtomicBoolean(false)
+
+        multiplatformExtension.apply {
+            jvm()
+
+            sourceSets.jvmMain {
+                testMarker = "jvmMain"
+                assertFalse(mainConfigurationCalled.getAndSet(true))
+            }
+
+            sourceSets.jvmTest {
+                testMarker = "jvmTest"
+                assertFalse(testConfigurationCalled.getAndSet(true))
+            }
+
+            configurationResult.await()
+            assertEquals("jvmMain", sourceSets.jvmMain.get().testMarker)
+            assertEquals("jvmTest", sourceSets.jvmTest.get().testMarker)
+        }
+    }
+
+    @Test
+    fun `test - languageSettings`() = buildProjectWithMPP().runLifecycleAwareTest {
+        multiplatformExtension.apply {
+            jvm()
+
+            sourceSets.jvmMain.languageSettings {
+                this.optIn("jvmMain.optIn")
+            }
+
+            sourceSets.jvmTest.languageSettings {
+                this.optIn("jvmTest.optIn")
+            }
+
+            assertEquals(setOf("jvmMain.optIn"), sourceSets.jvmMain.get().languageSettings.optInAnnotationsInUse)
+            assertEquals(setOf("jvmTest.optIn"), sourceSets.jvmTest.get().languageSettings.optInAnnotationsInUse)
+        }
+    }
+
+    @Test
+    fun `test - dependencies`() = buildProjectWithMPP().runLifecycleAwareTest {
+        multiplatformExtension.apply {
+            jvm()
+
+            sourceSets.jvmMain.dependencies {
+                implementation("my:jvmMain:library")
+            }
+
+            sourceSets.jvmTest.dependencies {
+                implementation("my:jvmTest:library")
+            }
+
+            assertContainsDependencies(
+                sourceSets.jvmMain.get().implementationConfigurationName,
+                "my:jvmMain:library"
+            )
+
+            assertContainsDependencies(
+                sourceSets.jvmTest.get().implementationConfigurationName,
+                "my:jvmTest:library"
+            )
+        }
+    }
+
+}