Quick Fix for an undefined class in is/as expressions.

pkg/analysis_server/test/services/correction/fix_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library test.services.correction.fix;
 
 import 'package:analysis_server/src/protocol.dart' hide AnalysisError;
 import 'package:analysis_server/src/services/correction/fix.dart';
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/index/local_memory_index.dart';
@@ skipping 1828 matching lines @@
     performAllAnalysisTasks();
     assertHasFix(FixKind.IMPORT_LIBRARY_SDK, '''
 import 'dart:math';
 
 @PI
 main() {
 }
 ''');
   }
 
+  void test_importLibrarySdk_withType_AsExpression() {
+    _indexTestUnit('''
+main(p) {
+  p as Future;
+}
+''');
+    assertHasFix(FixKind.IMPORT_LIBRARY_SDK, '''
+import 'dart:async';
+
+main(p) {
+  p as Future;
+}
+''');
+  }
+
   void test_importLibrarySdk_withType_invocationTarget() {
     _indexTestUnit('''
 main() {
   Future.wait(null);
 }
 ''');
     assertHasFix(FixKind.IMPORT_LIBRARY_SDK, '''
 import 'dart:async';
 
 main() {
   Future.wait(null);
 }
 ''');
   }
 
+  void test_importLibrarySdk_withType_IsExpression() {
+    _indexTestUnit('''
+main(p) {
+  p is Future;
+}
+''');
+    assertHasFix(FixKind.IMPORT_LIBRARY_SDK, '''
+import 'dart:async';
+
+main(p) {
+  p is Future;
+}
+''');
+  }
+
   void test_importLibrarySdk_withType_typeAnnotation() {
     _indexTestUnit('''
 main() {
   Future f = null;
 }
 ''');
     assertHasFix(FixKind.IMPORT_LIBRARY_SDK, '''
 import 'dart:async';
 
 main() {
@@ skipping 967 matching lines @@
       positions.add(new Position(testFile, offset));
     }
     return positions;
   }
 
   void _indexTestUnit(String code) {
     resolveTestUnit(code);
     index.indexUnit(context, testUnit);
   }
 }