MPP: Implement isTestModule flag (as required by JPS)

jps-plugin/src/org/jetbrains/kotlin/jps/build/KotlinSourceRootProvider.kt

@@ -14,12 +14,12 @@ import org.jetbrains.jps.incremental.ModuleBuildTarget
 import org.jetbrains.jps.model.java.JavaResourceRootType
 import org.jetbrains.jps.model.java.JavaSourceRootProperties
 import org.jetbrains.jps.model.java.JavaSourceRootType
-import org.jetbrains.jps.model.java.JpsJavaExtensionService
 import org.jetbrains.jps.model.module.JpsModule
 import org.jetbrains.jps.model.module.JpsModuleSourceRootType
 import org.jetbrains.kotlin.config.KotlinResourceRootType
 import org.jetbrains.kotlin.config.KotlinSourceRootType
 import org.jetbrains.kotlin.jps.model.expectedByModules
+import org.jetbrains.kotlin.jps.model.isTestModule
 import org.jetbrains.kotlin.jps.model.sourceSetModules
 import java.io.File
 
@@ -54,8 +54,10 @@ class KotlinSourceRootProvider : AdditionalRootsProviderService<JavaSourceRootDe
         }
 
         // new multiplatform model support:
-        module.sourceSetModules.forEach { sourceSetModule ->
-            addModuleSourceRoots(result, sourceSetModule, target)
+        if (target.isTests == module.isTestModule) {
+            module.sourceSetModules.forEach { sourceSetModule ->
+                addModuleSourceRoots(result, sourceSetModule, target)
+            }
         }
 
         // legacy multiplatform model support:

jps-plugin/src/org/jetbrains/kotlin/jps/model/ModuleSettings.kt

@@ -22,6 +22,9 @@ val JpsModule.platform: IdePlatform<*, *>?
 val JpsModule.kotlinKind: KotlinModuleKind
     get() = kotlinFacet?.settings?.kind ?: KotlinModuleKind.DEFAULT
 
+val JpsModule.isTestModule: Boolean
+    get() = kotlinFacet?.settings?.isTestModule ?: false
+
 /**
  * Modules which is imported from sources sets of the compilation represented by this module.
  * This module is not included.