Fixed Kotlin2JsCompile not picking dependencies from configurations other than compile.

Example:

	apply plugin: 'kotlin2js'

    dependencies {
    	...
    	testCompile "org.jetbrains.kotlin:kotlin-test-js:$kotlin_version"
    }

Here, the `:compileTestKotlin2Js` task did not pick the dependency and used the `compile` classpath.
This has been fixed.

Also, fixed `testCompileTestCouldAccessProduction` and added `testJsCustomSourceSet`.

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

@@ -79,10 +79,10 @@ class Kotlin2JsGradlePluginIT : BaseGradleIT() {
     @Test
     fun testCompileTestCouldAccessProduction() {
         val project = Project("kotlin2JsProjectWithTests", "2.10")
-        
+
         project.build("build") {
             assertSuccessful()
-            
+
             assertContains(
                     ":compileKotlin2Js",
                     ":compileTestKotlin2Js"
@@ -93,6 +93,23 @@ class Kotlin2JsGradlePluginIT : BaseGradleIT() {
         }
     }
 
+    @Test
+    fun testJsCustomSourceSet() {
+        val project = Project("kotlin2JsProjectWithCustomSourceset", "2.10")
+
+        project.build("build") {
+            assertSuccessful()
+
+            assertContains(
+                    ":compileKotlin2Js",
+                    ":compileIntegrationTestKotlin2Js"
+            )
+
+            assertFileExists("build/kotlin2js/main/module.js")
+            assertFileExists("build/kotlin2js/integrationTest/module-inttests.js")
+        }
+    }
+
     @Test
     fun testKotlinJsBuiltins() {
         val project = Project("kotlinBuiltins", "3.2")

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kotlin2JsProjectWithCustomSourceset/build.gradle

@@ -0,0 +1,42 @@
+buildscript {
+    repositories {
+        mavenLocal()
+    }
+    dependencies {
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+apply plugin: 'kotlin2js'
+
+repositories {
+    mavenLocal()
+}
+
+sourceSets {
+    integrationTest
+}
+
+task integrationTest(type: Test) {
+    testClassesDir = sourceSets.integrationTest.output.classesDir
+    classpath = sourceSets.integrationTest.runtimeClasspath
+}
+
+compileIntegrationTestKotlin2Js.dependsOn compileKotlin2Js
+
+compileKotlin2Js.kotlinOptions.outputFile = "${buildDir}/kotlin2js/main/module.js"
+compileIntegrationTestKotlin2Js.kotlinOptions.outputFile = "${buildDir}/kotlin2js/integrationTest/module-inttests.js"
+
+dependencies {
+    compile "org.jetbrains.kotlin:kotlin-stdlib-js:$kotlin_version"
+    integrationTestCompile files(file(compileKotlin2Js.kotlinOptions.outputFile).parent)
+    integrationTestCompile "org.jetbrains.kotlin:kotlin-test-js:$kotlin_version"
+}
+
+task jarSources(type: Jar) {
+    from sourceSets.main.allSource
+    classifier = 'source'
+}
+artifacts {
+    compile jarSources
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kotlin2JsProjectWithCustomSourceset/src/integrationTest/kotlin/MainIT.kt

@@ -0,0 +1,13 @@
+package test
+
+import example.MyProductionClass
+import org.junit.Test
+
+class MainIT {
+    @Test
+    fun mySimpleTest() {
+        listOf(1, 2, 3).forEach { // check that stdlib is available
+            MyProductionClass().i = it // check that production code is available
+        }
+    }
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kotlin2JsProjectWithCustomSourceset/src/main/kotlin/Main.kt

@@ -0,0 +1,5 @@
+package example
+
+class MyProductionClass {
+    var i = 0
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kotlin2JsProjectWithTests/build.gradle

@@ -15,6 +15,7 @@ repositories {
 
 dependencies {
     compile "org.jetbrains.kotlin:kotlin-stdlib-js:$kotlin_version"
+    testCompile "org.jetbrains.kotlin:kotlin-test-js:$kotlin_version"
 }
 
 task jarSources(type: Jar) {

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kotlin2JsProjectWithTests/src/test/kotlin/MainTest.kt

@@ -4,7 +4,7 @@ import org.junit.Test
 import example.MyProductionClass
 
 class MyTest {
-    @Test
+	@Test
     fun mySimpleTest() {
         MyProductionClass().i = 10
     }

libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/tasks/Tasks.kt

@@ -55,6 +55,11 @@ const val USING_EXPERIMENTAL_INCREMENTAL_MESSAGE = "Using experimental kotlin in
 abstract class AbstractKotlinCompile<T : CommonCompilerArguments>() : AbstractCompile(), CompilerArgumentAware {
     abstract protected fun populateCompilerArguments(): T
 
+    protected val additionalClasspath = arrayListOf<File>()
+    protected val compileClasspath: Iterable<File>
+        get() = (classpath + additionalClasspath)
+                .filterTo(LinkedHashSet(), File::exists)
+
     override val serializedCompilerArguments: List<String>
         get() {
             val arguments = populateCompilerArguments()
@@ -166,10 +171,6 @@ open class KotlinCompile : AbstractKotlinCompile<K2JVMCompilerArguments>(), Kotl
         }
 
     private var kaptAnnotationsFileUpdater: AnnotationFileUpdater? = null
-    private val additionalClasspath = arrayListOf<File>()
-    private val compileClasspath: Iterable<File>
-            get() = (classpath + additionalClasspath)
-                    .filterTo(LinkedHashSet(), File::exists)
 
     internal val kaptOptions = KaptOptions()
     internal val pluginOptions = CompilerPluginOptions()
@@ -342,7 +343,7 @@ open class Kotlin2JsCompile() : AbstractKotlinCompile<K2JSCompilerArguments>(),
                 ?.let { if (LibraryUtils.isKotlinJavascriptLibrary(it)) it else null }
                 ?.absolutePath
 
-        val dependencies = project.configurations.getByName("compile")
+        val dependencies = compileClasspath
                 .filter { LibraryUtils.isKotlinJavascriptLibrary(it) }
                 .map { it.canonicalPath }