Add mirrors tests

test/codegen/lib/mirrors/metadata_scope_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.metadata_scope;
+
+import 'dart:mirrors';
+import 'package:expect/expect.dart';
+
+class Annotation {
+  final contents;
+  const Annotation(this.contents);
+  toString() => "Annotation($contents)";
+}
+
+// Note there is no compile-time constant 'foo' in scope. In particular, A.foo
+// is not in scope here.
+@Annotation(foo)  /// 01: compile-time error
+class A <@Annotation(foo) T> {
+  @Annotation(foo)
+  static foo() {}
+
+  @Annotation(foo)
+  static bar() {}
+}
+
+@Annotation(B.foo)
+class B <@Annotation(B.foo) T> {
+  @Annotation(B.foo)
+  static foo() {}
+
+  @Annotation(B.foo)
+  static bar() {}
+}
+
+baz() {}
+
+// Note the top-level function baz is in scope here, not C.baz.
+@Annotation(baz)
+class C <@Annotation(baz) T> {
+  @Annotation(baz)
+  static baz() {}
+}
+
+checkMetadata(DeclarationMirror mirror, List expectedMetadata) {
+  Expect.listEquals(expectedMetadata.map(reflect).toList(), mirror.metadata);
+}
+
+main() {
+  reflectClass(A).metadata;
+  checkMetadata(reflectClass(A).declarations[#T], [const Annotation(A.foo)]);
+  checkMetadata(reflectClass(A).declarations[#foo], [const Annotation(A.foo)]);
+  checkMetadata(reflectClass(A).declarations[#bar], [const Annotation(A.foo)]);
+  checkMetadata(reflectClass(B), [const Annotation(B.foo)]);
+  checkMetadata(reflectClass(B).declarations[#T], [const Annotation(B.foo)]);
+  checkMetadata(reflectClass(B).declarations[#foo], [const Annotation(B.foo)]);
+  checkMetadata(reflectClass(B).declarations[#bar], [const Annotation(B.foo)]);
+  // The top-level function baz, not C.baz.
+  checkMetadata(reflectClass(C), [const Annotation(baz)]);
+  // C.baz, not the top-level function baz.
+  checkMetadata(reflectClass(C).declarations[#T], [const Annotation(C.baz)]);
+  checkMetadata(reflectClass(C).declarations[#baz], [const Annotation(C.baz)]);
+}