Allow building UAST for in-memory virtual files

compiler/light-classes/src/org/jetbrains/kotlin/asJava/classes/KtLightClassForSourceDeclaration.kt

@@ -104,8 +104,6 @@ abstract class KtLightClassForSourceDeclaration(protected val classOrObject: KtC
     }
 
     private val _containingFile: PsiFile by lazyPub {
-        classOrObject.containingFile.virtualFile ?: error("No virtual file for " + classOrObject.text)
-
         object : FakeFileForLightClass(
                 classOrObject.containingKtFile,
                 { if (classOrObject.isTopLevel()) this else create(getOutermostClassOrObject(classOrObject))!! },

compiler/light-classes/src/org/jetbrains/kotlin/asJava/elements/FakeFileForLightClass.kt

@@ -33,7 +33,7 @@ open class FakeFileForLightClass(
         private val lightClass: () -> KtLightClass,
         private val stub: () -> PsiClassHolderFileStub<*>,
         private val packageFqName: FqName = ktFile.packageFqName
-) : ClsFileImpl(ClassFileViewProvider(ktFile.manager, ktFile.virtualFile)) {
+) : ClsFileImpl(ClassFileViewProvider(ktFile.manager, ktFile.viewProvider.virtualFile)) {
     override fun getPackageName() = packageFqName.asString()
 
     override fun getStub() = stub()

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/resolve/IDELightClassGenerationSupport.kt

@@ -129,7 +129,8 @@ class IDELightClassGenerationSupport(private val project: Project) : LightClassG
                     return SourceNavigationHelper.getOriginalClass(classOrObject) as? KtLightClass
             }
         }
-        if ((classOrObject.containingFile as? KtFile)?.analysisContext != null) {
+        if ((classOrObject.containingFile as? KtFile)?.analysisContext != null ||
+            classOrObject.containingFile.originalFile.virtualFile != null) {
             // explicit request to create light class from dummy.kt
             return KtLightClassForSourceDeclaration.create(classOrObject)
         }

plugins/uast-kotlin/build.gradle.kts

@@ -14,8 +14,20 @@ dependencies {
     testCompile(commonDep("junit:junit"))
     testCompile(project(":compiler:util"))
     testCompile(project(":compiler:cli"))
-    testCompile(project(":idea:idea-android"))
+    testCompile(project(":idea:idea-test-framework"))
     testRuntime(ideaSdkDeps("*.jar"))
+    testRuntime(ideaPluginDeps("*.jar", plugin = "junit"))
+    testRuntime(ideaPluginDeps("*.jar", plugin = "gradle"))
+    testRuntime(ideaPluginDeps("*.jar", plugin = "Groovy"))
+    testRuntime(ideaPluginDeps("*.jar", plugin = "android"))
+    testRuntime(ideaPluginDeps("*.jar", plugin = "maven"))
+    testRuntime(ideaPluginDeps("resources_en", plugin = "properties"))
+    testRuntime(project(":idea:idea-android"))
+    testRuntime(project(":idea:idea-gradle"))
+    testRuntime(project(":sam-with-receiver-ide-plugin"))
+    testRuntime(project(":allopen-ide-plugin"))
+    testRuntime(project(":noarg-ide-plugin"))
+    testRuntime(project(":plugins:android-extensions-ide"))
 }
 
 sourceSets {

plugins/uast-kotlin/tests/KotlinDetachedUastTest.kt

@@ -0,0 +1,58 @@
+/*
+ * Copyright 2010-2017 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.uast.test.kotlin
+
+import com.intellij.psi.PsiFile
+import com.intellij.psi.PsiLanguageInjectionHost
+import com.intellij.testFramework.LightProjectDescriptor
+import junit.framework.TestCase
+import org.jetbrains.kotlin.idea.core.copied
+import org.jetbrains.kotlin.idea.test.KotlinLightCodeInsightFixtureTestCase
+import org.jetbrains.kotlin.idea.test.KotlinWithJdkAndRuntimeLightProjectDescriptor
+import org.jetbrains.kotlin.psi.psiUtil.getParentOfType
+import org.jetbrains.uast.UClass
+import org.jetbrains.uast.getParentOfType
+import org.jetbrains.uast.toUElement
+
+class KotlinDetachedUastTest : KotlinLightCodeInsightFixtureTestCase() {
+
+    override fun getProjectDescriptor(): LightProjectDescriptor = KotlinWithJdkAndRuntimeLightProjectDescriptor.INSTANCE
+
+
+    fun testStringAnnotationWithEmpty() {
+
+        val psiFile = myFixture.configureByText("AnnotatedClass.kt", """
+            class AnnotatedClass {
+                    @JvmName(name = "")
+                    fun bar(param: String) = null
+            }
+        """.trimIndent())
+
+        fun psiElement(file: PsiFile): Any? = (file.findElementAt(file.text.indexOf("\"\"")) ?: error("not found"))
+                .getParentOfType<PsiLanguageInjectionHost>(false).orFail("host")
+                .toUElement().orFail("uelement").getParentOfType<UClass>(false)
+                .orFail("UClass").psi.orFail("psi").also {
+        }
+
+        TestCase.assertNotNull("base", psiElement(psiFile))
+        val copied = psiFile.copied()
+        TestCase.assertNull("vf for $copied", copied.virtualFile)
+        TestCase.assertNotNull("copy", psiElement(copied))
+    }
+}
+
+fun <T> T?.orFail(msg: String): T = this ?: error(msg)