Add tests for generic methods in strong mode

tests/language_strong/generic_methods_local_variable_declaration_test.dart

Index: tests/language_strong/generic_methods_local_variable_declaration_test.dart
diff --git a/tests/language_strong/generic_methods_local_variable_declaration_test.dart b/tests/language_strong/generic_methods_local_variable_declaration_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..46b22dfbdefa027390ac469495ff2774e9bdfb01
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+++ b/tests/language_strong/generic_methods_local_variable_declaration_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 a type variable can be used to declare local variables, and that
+// these local variables are of correct type.
+
+library generic_methods_local_variable_declaration_test;
+
+import "package:expect/expect.dart";
+
+class X {}
+
+abstract class Generator<T> {
+  T generate();
+}
+
+class A implements Generator<A> {
+  generate() {
+    return new A();
+  }
+
+  String toString() => "instance of A";
+}
+
+class B implements Generator<B> {
+  generate() {
+    return new B();
+  }
+
+  String toString() => "instance of B";
+}
+
+String fun<T extends Generator<T>>(T t) {
+  T another = t.generate();
+  String anotherName = "$another";
+
+  Expect.isTrue(another is T);
+  Expect.isTrue(another is Generator<T>);
+
+  return anotherName;
+}
+
+main() {
+  A a = new A();
+  B b = new B();
+
+  Expect.equals(fun<A>(a), "instance of A");
+  Expect.equals(fun<B>(b), "instance of B");
+}