Support is/as expressions in analyzer2dart.

pkg/analyzer2dart/test/end2end_data.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.
 
 /// Test data for the end2end test.
 library test.end2end.data;
 
 import 'test_helper.dart' show Group;
 import 'test_helper.dart' as base show TestSpec;
 
@@ skipping 627 matching lines @@
   }
 }''', '''
 main() {
   var i = 0;
   while (i < 10) {
     print(i);
     ++i;
   }
 }'''),
   ]),
+
+  const Group('Type operators', const <TestSpec>[
+    const TestSpec('''
+main(a) {
+  return a is String;
+}
+'''),
+
+    const TestSpec('''
+main(a) {
+  return a is List<String>;
+}
+'''),
+
+    const TestSpec('''
+main(a) {
+  return a is Comparator<String>;
+}
+'''),
+
+  const TestSpec('''
+main(a) {
+  return a is! String;
+}
+''', '''
+main(a) {
+  return !(a is String);
+}
+'''),
+
+const TestSpec('''
+main(a) {
+  return a as String;
+}
+'''),
+  ]),
 ];