Use module file index in getModuleInfo to determine source/test module info

Do not include files that are in content of module but are not in source content
Do not log error in case there is compiled kotlin file in source content

idea/idea-analysis/src/org/jetbrains/jet/plugin/caches/resolve/getModuleInfo.kt

@@ -26,6 +26,7 @@ import org.jetbrains.jet.asJava.FakeLightClassForFileOfPackage
 import org.jetbrains.jet.asJava.KotlinLightClassForPackage
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.vfs.VirtualFile
+import com.intellij.openapi.roots.ModuleRootManager
 
 fun PsiElement.getModuleInfo(): IdeaModuleInfo {
     fun logAndReturnDefault(message: String): IdeaModuleInfo {
@@ -66,13 +67,19 @@ private fun getModuleInfoByVirtualFile(project: Project, virtualFile: VirtualFil
 
     val module = projectFileIndex.getModuleForFile(virtualFile)
     if (module != null) {
-        if (isDecompiledFile) {
-            LOG.error("Decompiled file for ${virtualFile.getCanonicalPath()} is in content of $module")
+        fun warnIfDecompiled() {
+            if (isDecompiledFile) {
+                LOG.warn("Decompiled file for ${virtualFile.getCanonicalPath()} is in content of $module")
+            }
         }
-        if (projectFileIndex.isInTestSourceContent(virtualFile)) {
+
+        val moduleFileIndex = ModuleRootManager.getInstance(module).getFileIndex()
+        if (moduleFileIndex.isInTestSourceContent(virtualFile)) {
+            warnIfDecompiled()
             return module.testSourceInfo()
         }
-        else {
+        else if (moduleFileIndex.isInSourceContent(virtualFile)) {
+            warnIfDecompiled()
             return module.productionSourceInfo()
         }
     }