Add tests for generic methods in strong mode

tests/language_strong/generic_methods_reuse_type_variables_test.dart

Index: tests/language_strong/generic_methods_reuse_type_variables_test.dart
diff --git a/tests/language_strong/generic_methods_reuse_type_variables_test.dart b/tests/language_strong/generic_methods_reuse_type_variables_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..c885116fedb03998bcea55bda1d025944307ebb3
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+++ b/tests/language_strong/generic_methods_reuse_type_variables_test.dart
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+// 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.
+
+// Test that type parameter can be passed as a type argument in a definition of
+// a local variable, and that this local variable is correctly constructed.
+
+library generic_methods_reuse_type_variables_test;
+
+import "package:expect/expect.dart";
+
+int fun<T extends String>(T t) {
+  List<T> list = <T>[t, t, t];
+  Expect.isTrue(list is List<String>);
+  Expect.isTrue(list is! List<int>);
+  return list.length;
+}
+
+main() {
+  Expect.equals(fun<String>("foo"), 3);
+}