Return RequestErrorCode.NO_INDEX_GENERATED for search/refactoring requests.

pkg/analysis_server/test/edit/refactoring_test.dart

Index: pkg/analysis_server/test/edit/refactoring_test.dart
diff --git a/pkg/analysis_server/test/edit/refactoring_test.dart b/pkg/analysis_server/test/edit/refactoring_test.dart
index fbaf6ff49832eb3225f32064656ae5b35ce62877..7d5f12057d2d5ab3b679437f5b4135efa606ddd4 100644
--- a/pkg/analysis_server/test/edit/refactoring_test.dart
+++ b/pkg/analysis_server/test/edit/refactoring_test.dart
@@ -28,6 +28,7 @@ main() {
   runReflectiveTests(InlineMethodTest);
   runReflectiveTests(MoveFileTest);
   runReflectiveTests(RenameTest);
+  runReflectiveTests(_NoSearchEngine);
 }
 
 
@@ -638,6 +639,11 @@ class GetAvailableRefactoringsTest extends AbstractAnalysisTest {
     });
   }
 
+  @override
+  Index createIndex() {
+    return createLocalMemoryIndex();
+  }
+
   /**
    * Returns the list of available refactorings for the given [offset] and
    * [length].
@@ -1744,3 +1750,46 @@ class _AbstractGetRefactoring_Test extends AbstractAnalysisTest {
     handler = new EditDomainHandler(server);
   }
 }
+
+
+@reflectiveTest
+class _NoSearchEngine extends _AbstractGetRefactoring_Test {
+  @override
+  Index createIndex() {
+    return null;
+  }
+
+  test_getAvailableRefactorings() async {
+    addTestFile('''
+main() {
+  print(1 + 2);
+}
+''');
+    await waitForTasksFinished();
+    Request request =
+        new EditGetAvailableRefactoringsParams(testFile, 0, 0).toRequest('0');
+    return _assertErrorResposeNoIndex(request);
+  }
+
+  test_getRefactoring_noSearchEngine() async {
+    addTestFile('''
+main() {
+  print(1 + 2);
+}
+''');
+    await waitForTasksFinished();
+    Request request = new EditGetRefactoringParams(
+        RefactoringKind.EXTRACT_LOCAL_VARIABLE,
+        testFile,
+        0,
+        0,
+        true).toRequest('0');
+    return _assertErrorResposeNoIndex(request);
+  }
+
+  _assertErrorResposeNoIndex(Request request) async {
+    Response response = await serverChannel.sendRequest(request);
+    expect(response.error, isNotNull);
+    expect(response.error.code, RequestErrorCode.NO_INDEX_GENERATED);
+  }
+}