Add mirrors tests

test/codegen/lib/mirrors/null_test.dart

+// Copyright (c) 2013, 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.null_test;
+
+import 'dart:mirrors';
+
+import 'package:expect/expect.dart';
+
+main() {
+  InstanceMirror nullMirror = reflect(null);
+  Expect.isTrue(nullMirror.getField(#hashCode).reflectee is int);
+  Expect.equals(null.hashCode,
+                nullMirror.getField(#hashCode).reflectee);
+  Expect.equals('Null',
+                nullMirror.getField(#runtimeType).reflectee
+                .toString());
+  Expect.isTrue(nullMirror.invoke(#==, [null]).reflectee);
+  Expect.isFalse(nullMirror.invoke(#==, [new Object()])
+                 .reflectee);
+  Expect.equals('null',
+                nullMirror.invoke(#toString, []).reflectee);
+  Expect.throws(() => nullMirror.invoke(#notDefined, []),
+                (e) => e is NoSuchMethodError,
+                'noSuchMethod');
+
+  ClassMirror NullMirror = nullMirror.type;
+  Expect.equals(reflectClass(Null), NullMirror);
+  Expect.equals(#Null, NullMirror.simpleName);
+  Expect.equals(#Object, NullMirror.superclass.simpleName);
+  Expect.equals(null, NullMirror.superclass.superclass);
+  Expect.listEquals([], NullMirror.superinterfaces);
+  Map<Uri, LibraryMirror> libraries = currentMirrorSystem().libraries;
+  LibraryMirror coreLibrary = libraries[Uri.parse('dart:core')];
+  if (coreLibrary == null) {
+    // In minified mode we don't preserve the URIs.
+    coreLibrary = libraries.values
+        .firstWhere((LibraryMirror lm) => lm.simpleName == #dart.core);
+    Uri uri = coreLibrary.uri;
+    Expect.equals("https", uri.scheme);
+    Expect.equals("dartlang.org", uri.host);
+    Expect.equals("/dart2js-stripped-uri", uri.path);
+  }
+  Expect.equals(coreLibrary, NullMirror.owner);
+}