[Gradle, Native, IT] Add test for exporting published lib

This test checks that `transitiveExport = true` is no longer required
for exporting a published multiplatform library in a native library.

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/native/GeneralNativeIT.kt

@@ -459,6 +459,34 @@ class GeneralNativeIT : BaseGradleIT() {
         }
     }
 
+    @Test
+    fun testTransitiveExportIsNotRequiredForExportingVariant() = with(
+        transformNativeTestProjectWithPluginDsl(
+            wrapperVersion = GradleVersionRequired.AtLeast("6.8"), // See https://youtrack.jetbrains.com/issue/KT-52447
+            projectName = "export-published-lib",
+            directoryPrefix = "native-binaries"
+        )
+    ) {
+        val binaryName = "shared"
+        val headerPath = "shared/build/bin/linuxX64/debugStatic/lib${binaryName}_api.h"
+        val binaryBuildTask = "linkDebugStaticLinuxX64"
+
+        build(":lib:publish") {
+            assertSuccessful()
+        }
+
+        build(":shared:$binaryBuildTask") {
+            assertSuccessful()
+            assertFileExists(headerPath)
+            val headerContents = fileInWorkingDir(headerPath).readText()
+
+            assertTrue(headerContents.contains("funInShared"))
+
+            // Check that the function from exported published library (:lib) is included to the header:
+            assertTrue(headerContents.contains("funToExport"))
+        }
+    }
+
     @Test
     fun testNativeExecutables() = with(transformNativeTestProjectWithPluginDsl("executables", directoryPrefix = "native-binaries")) {
         val binaries = mutableListOf(

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/native-binaries/export-published-lib/lib/build.gradle.kts

@@ -0,0 +1,24 @@
+plugins {
+    kotlin("multiplatform").version("<pluginMarkerVersion>")
+    `maven-publish`
+}
+
+repositories {
+    mavenLocal()
+    maven("../repo")
+    mavenCentral()
+}
+
+group = "com.example"
+version = "1.0"
+
+kotlin {
+    jvm()
+    linuxX64()
+}
+
+publishing {
+    repositories {
+        maven("../repo")
+    }
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/native-binaries/export-published-lib/lib/src/commonMain/kotlin/test.kt

@@ -0,0 +1 @@
+fun funToExport() {}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/native-binaries/export-published-lib/settings.gradle.kts

@@ -0,0 +1,2 @@
+include("lib")
+include("shared")

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/native-binaries/export-published-lib/shared/build.gradle.kts

@@ -0,0 +1,26 @@
+plugins {
+    kotlin("multiplatform").version("<pluginMarkerVersion>")
+}
+
+repositories {
+    mavenLocal()
+    maven("../repo")
+    mavenCentral()
+}
+
+kotlin {
+    jvm()
+    linuxX64 {
+        binaries.staticLib {
+            export("com.example:lib:1.0")
+        }
+    }
+
+    sourceSets {
+        val commonMain by getting {
+            dependencies {
+                api("com.example:lib:1.0")
+            }
+        }
+    }
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/native-binaries/export-published-lib/shared/src/commonMain/kotlin/shared.kt

@@ -0,0 +1 @@
+fun funInShared() {}