[Gradle, JS] KT-36784 Composite build test

#KT-32466 fixed
#KT-36784 fixed
#KT-36864 fixed

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

@@ -215,7 +215,12 @@ abstract class BaseGradleIT {
         val jsCompilerType: KotlinJsCompilerType? = null
     )
 
-    data class KaptOptions(val verbose: Boolean, val useWorkers: Boolean, val incrementalKapt: Boolean = false, val includeCompileClasspath: Boolean = true)
+    data class KaptOptions(
+        val verbose: Boolean,
+        val useWorkers: Boolean,
+        val incrementalKapt: Boolean = false,
+        val includeCompileClasspath: Boolean = true
+    )
 
     open inner class Project(
         val projectName: String,
@@ -630,13 +635,11 @@ Finished executing task ':$taskName'|
         }
 
     fun Project.gradleProperties(): File =
-        listOf("gradle.properties").map {
-            File(projectDir, it).also { file ->
-                if (!file.exists()) {
-                    file.createNewFile()
-                }
+        File(projectDir, "gradle.properties").also { file ->
+            if (!file.exists()) {
+                file.createNewFile()
             }
-        }.single()
+        }
 
     /**
      * @param assertionFileName path to xml with expected test results, relative to test resources root
@@ -709,7 +712,7 @@ Finished executing task ':$taskName'|
     }
 
     private fun prettyPrintXml(uglyXml: String): String =
-            XMLOutputter(Format.getPrettyFormat()).outputString(SAXBuilder().build(uglyXml.reader()))
+        XMLOutputter(Format.getPrettyFormat()).outputString(SAXBuilder().build(uglyXml.reader()))
 
     private fun Project.createGradleTailParameters(options: BuildOptions, params: Array<out String> = arrayOf()): List<String> =
         params.toMutableList().apply {

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/Kotlin2JsGradlePluginIT.kt

@@ -548,6 +548,35 @@ abstract class AbstractKotlin2JsGradlePluginIT(private val irBackend: Boolean) :
         }
     }
 
+    @Test
+    fun testJsCompositeBuild() {
+        val rootProjectName = "js-composite-build"
+        val appProject = transformProjectWithPluginsDsl(
+            projectName = "app",
+            directoryPrefix = rootProjectName,
+            wrapperVersion = GradleVersionRequired.AtLeast("5.3")
+        )
+
+        val libProject = transformProjectWithPluginsDsl(
+            projectName = "lib",
+            directoryPrefix = rootProjectName,
+            wrapperVersion = GradleVersionRequired.AtLeast("5.3")
+        )
+
+        if (irBackend) {
+            libProject.gradleProperties().appendText(jsCompilerType(KotlinJsCompilerType.IR))
+            appProject.gradleProperties().appendText(jsCompilerType(KotlinJsCompilerType.IR))
+        }
+
+        libProject.projectDir.copyRecursively(appProject.projectDir.resolve(libProject.projectDir.name))
+
+        with(appProject) {
+            build("build") {
+                assertSuccessful()
+            }
+        }
+    }
+
     @Test
     fun testBrowserDistribution() = with(Project("kotlin-js-browser-project", GradleVersionRequired.AtLeast("4.10.2"))) {
         setupWorkingDir()

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/js-composite-build/app/build.gradle.kts

@@ -0,0 +1,19 @@
+plugins {
+    kotlin("js") version "<pluginMarkerVersion>"
+}
+
+repositories {
+    jcenter()
+    mavenLocal()
+    mavenCentral()
+}
+
+kotlin.js {
+    binaries.executable()
+    nodejs()
+}
+
+dependencies {
+    implementation(kotlin("stdlib-js"))
+    implementation("com.example:lib2")
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/js-composite-build/app/settings.gradle.kts

@@ -0,0 +1,8 @@
+pluginManagement {
+    repositories {
+        mavenLocal()
+        gradlePluginPortal()
+    }
+}
+
+includeBuild("lib")

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/js-composite-build/app/src/main/kotlin/Main.kt

@@ -0,0 +1,3 @@
+fun main() {
+    println(Singleton.test())
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/js-composite-build/lib/build.gradle.kts

@@ -0,0 +1,17 @@
+group = "com.example"
+
+plugins {
+    kotlin("js") version "<pluginMarkerVersion>"
+}
+
+repositories {
+    jcenter()
+    mavenCentral()
+    mavenLocal()
+}
+
+kotlin.target.nodejs()
+
+dependencies {
+    implementation(kotlin("stdlib-js"))
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/js-composite-build/lib/settings.gradle.kts

@@ -0,0 +1,11 @@
+rootProject.name = "lib2"
+
+pluginManagement {
+    repositories {
+        gradlePluginPortal()
+
+        mavenLocal()
+
+        mavenCentral()
+    }
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/js-composite-build/lib/src/main/kotlin/Singleton.kt

@@ -0,0 +1,5 @@
+object Singleton {
+    fun test(): String {
+        return "42"
+    }
+}