merge to trunk all changes from 36817 until 37378 under the packages: polymer,

pkg/polymer_expressions/test/eval_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 eval_test;
 
 import 'dart:async';
 
 // Import mirrors to cause all mirrors to be retained by dart2js.
 // The tests reflect on LinkedHashMap.length and String.length.
@@ skipping 74 matching lines @@
       expectEval('5 % -2', 1);
       expectEval('-5 % 2', 1);
 
       expectEval('1 == 1', true);
       expectEval('1 == 2', false);
       expectEval('1 == null', false);
       expectEval('1 != 1', false);
       expectEval('1 != 2', true);
       expectEval('1 != null', true);
 
+      var x = {};
+      var y = {};
+      expectEval('x === y', true, null, {'x': x, 'y': x});
+      expectEval('x !== y', false, null, {'x': x, 'y': x});
+      expectEval('x === y', false, null, {'x': x, 'y': y});
+      expectEval('x !== y', true, null, {'x': x, 'y': y});
+
       expectEval('1 > 1', false);
       expectEval('1 > 2', false);
       expectEval('2 > 1', true);
       expectEval('1 >= 1', true);
       expectEval('1 >= 2', false);
       expectEval('2 >= 1', true);
       expectEval('1 < 1', false);
       expectEval('1 < 2', true);
       expectEval('2 < 1', false);
       expectEval('1 <= 1', true);
@@ skipping 306 matching lines @@
 class Add extends Transformer<int, int> {
   final int i;
   Add(this.i);
   int forward(int x) => x + i;
   int reverse(int x) => x - i;
 }
 
 Object evalString(String s, [Object model, Map vars]) =>
     eval(new Parser(s).parse(), new Scope(model: model, variables: vars));
 
-expectEval(String s, dynamic matcher, [Object model, Map vars = const {}]) =>
-    expect(
-        eval(new Parser(s).parse(), new Scope(model: model, variables: vars)),
-        matcher,
-        reason: s);
+expectEval(String s, dynamic matcher, [Object model, Map vars = const {}]) {
+  var expr = new Parser(s).parse();
+  var scope = new Scope(model: model, variables: vars);
+  expect(eval(expr, scope), matcher, reason: s);
+
+  var observer = observe(expr, scope);
+  new Updater(scope).visit(observer);
+  expect(observer.currentValue, matcher, reason: s);
+}
 
 expectObserve(String s, {
     Object model,
     Map variables: const {},
     dynamic beforeMatcher,
     mutate(),
     dynamic afterMatcher}) {
 
   var scope = new Scope(model: model, variables: variables);
   var observer = observe(new Parser(s).parse(), scope);
@@ skipping 10 matching lines @@
   return Future.wait([future, new Future(() {
     expect(passed, true, reason: "Didn't receive a change notification on $s");
   })]);
 }
 
 // Regression test from https://code.google.com/p/dart/issues/detail?id=13459
 class WordElement extends Observable {
   @observable List chars1 = 'abcdefg'.split('');
   @reflectable List filteredList(List original) => [original[0], original[1]];
 }