Add tests for generic methods in strong mode

tests/language_strong/generic_methods_simple_is_expression_test.dart

Index: tests/language_strong/generic_methods_simple_is_expression_test.dart
diff --git a/tests/language_strong/generic_methods_simple_is_expression_test.dart b/tests/language_strong/generic_methods_simple_is_expression_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..ff123d6238eff7aafaad4daa10d8d5fe2ef93310
--- /dev/null
+++ b/tests/language_strong/generic_methods_simple_is_expression_test.dart
@@ -0,0 +1,16 @@
+// Copyright (c) 2017, 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 generic_methods_simple_is_expression_test;
+
+import "package:expect/expect.dart";
+
+bool fun<T>(int n) {
+  return n is T;
+}
+
+main() {
+  Expect.isTrue(fun<int>(42));
+  Expect.isFalse(fun<String>(42));
+}