[ObjCExport] Fe10: Implement test with exported and non exported klib dependencies

KT-65670

repo/gradle-build-conventions/buildsrc-compat/src/main/kotlin/common-configuration.gradle.kts

@@ -167,7 +167,7 @@ fun Project.configureKotlinCompilationOptions() {
             // This is a workaround for KT-50876, but with no clear explanation why doFirst is used.
             // However, KGP with Native targets is used in the native-xctest project, and this code fails with
             //  The value for property 'freeCompilerArgs' is final and cannot be changed any further.
-            if (project.path != ":native:kotlin-test-native-xctest") {
+            if (project.path != ":native:kotlin-test-native-xctest" && !project.path.startsWith(":native:objcexport-header-generator")) {
                 doFirst {
                     if (!useAbsolutePathsInKlib) {
                         @Suppress("DEPRECATION")

repo/gradle-build-conventions/buildsrc-compat/src/main/kotlin/objc-export-header-generator-test-library.gradle.kts

@@ -0,0 +1,22 @@
+/**
+ * Used in for modules in 'native/objcexport-heade-generator/testDependencies.
+ * Such libraries can build klibs that can then later be used for running objc export tests against
+ */
+plugins {
+    kotlin("multiplatform")
+}
+
+/*
+Depends on https://youtrack.jetbrains.com/issue/KT-65985
+ */
+providers.systemProperty("kotlin.internal.native.test.nativeHome").orNull?.let { nativeHome ->
+    extensions.extraProperties.set("kotlin.native.home", nativeHome)
+}
+
+kotlin {
+    macosArm64()
+    macosX64()
+    linuxX64()
+    linuxArm64()
+    mingwX64()
+}

repo/gradle-build-conventions/buildsrc-compat/src/main/kotlin/objcExportHeaderGeneratorTest.kt

@@ -1,5 +1,16 @@
 import org.gradle.api.Project
+import org.gradle.api.attributes.Category
+import org.gradle.api.attributes.Usage
+import org.gradle.api.tasks.PathSensitivity
 import org.gradle.api.tasks.testing.Test
+import org.gradle.kotlin.dsl.dependencies
+import org.gradle.kotlin.dsl.named
+import org.gradle.kotlin.dsl.project
+import org.jetbrains.kotlin.gradle.plugin.KotlinPlatformType
+import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinNativeTarget
+import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinUsages
+import org.jetbrains.kotlin.konan.target.HostManager
+import java.io.File
 
 /*
  * Copyright 2010-2024 JetBrains s.r.o. and Kotlin Programming Language contributors.
@@ -19,11 +30,49 @@ fun Project.objCExportHeaderGeneratorTest(
     tag = null,
     requirePlatformLibs = false,
 ) {
+    /**
+     * Setup klib dependencies that can be used in tests:
+     * The resolved klibs will be available as classpath under the `testDependencyKlibs` System property.
+     */
+    run {
+        /* Configuration to resolve klibs for the current host */
+        val testDependencyKlibs = configurations.maybeCreate("testDependencyKlibs").also { configuration ->
+            configuration.attributes {
+                attribute(Usage.USAGE_ATTRIBUTE, objects.named(KotlinUsages.KOTLIN_API))
+                attribute(Category.CATEGORY_ATTRIBUTE, objects.named(Category.LIBRARY))
+                attribute(KotlinPlatformType.attribute, KotlinPlatformType.native)
+                attribute(KotlinNativeTarget.konanTargetAttribute, HostManager.host.name)
+            }
+
+            dependencies {
+                configuration(project(":native:objcexport-header-generator:testLibraryA"))
+                configuration(project(":native:objcexport-header-generator:testLibraryB"))
+            }
+        }
+
+        /* Create a classpath (list of file paths) that will be exposed as System property */
+        val testDependencyKlibsClasspath = testDependencyKlibs.incoming.files.elements.map { elements ->
+            elements.joinToString(File.pathSeparator) { location -> location.asFile.absolutePath }
+        }
+
+        doFirst {
+            systemProperty("testDependencyKlibs", testDependencyKlibsClasspath.get())
+        }
+
+        /* Add dependency files as inputs to this test task */
+        inputs.files(testDependencyKlibs).withPathSensitivity(PathSensitivity.RELATIVE)
+    }
+
     useJUnitPlatform()
     enableJunit5ExtensionsAutodetection()
+
+    /* Special 'Kotlin in Fleet' flag that can switch test mode to 'local development' */
     systemProperty("kif.local", project.providers.gradleProperty("kif.local").isPresent)
+
+    /* Tests will show this displayName as an additional tag (e.g., to differentiate between K1 and AA tests) */
     if (testDisplayNameTag != null) {
         systemProperty("testDisplayName.tag", testDisplayNameTag)
     }
+
     configure()
 }