Roll Observatory packages and add a roll script

packages/polymer_expressions/test/globals_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.
+
+import 'dart:async';
+import 'dart:html';
+
+import 'package:observe/observe.dart';
+import 'package:observe/mirrors_used.dart'; // make test smaller.
+import 'package:smoke/mirrors.dart' as smoke;
+import 'package:polymer_expressions/polymer_expressions.dart';
+import 'package:template_binding/template_binding.dart';
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_config.dart';
+
+main() {
+  useHtmlConfiguration();
+  smoke.useMirrors();
+
+  var testDiv;
+  group('enumerate', () {
+    setUp(() {
+      testDiv = new Element.html('''
+          <div id="test">
+            <template bind>
+              <template repeat="{{entry in this | enumerate}}">
+                <div>Item {{ entry.index }} is {{ entry.value }}</div>
+              </template>
+            </template>
+          </div>''');
+      TemplateBindExtension.bootstrap(testDiv);
+      document.body.nodes.add(testDiv);
+    });
+
+    tearDown(() {
+      testDiv.remove();
+      testDiv = null;
+    });
+
+    test('should enumerate item and index', () {
+      templateBind(testDiv.query('template'))
+          ..bindingDelegate = new PolymerExpressions()
+          ..model = toObservable(
+              ['hello', 'from', 'polymer', 'expressions']);
+
+      return new Future(() {
+        expect(testDiv.queryAll('div').map((n) => n.text), [
+          'Item 0 is hello',
+          'Item 1 is from',
+          'Item 2 is polymer',
+          'Item 3 is expressions',
+        ]);
+      });
+    });
+
+    test('should update after changes', () {
+      var model = toObservable(
+              ['hello', 'from', 'polymer', 'expressions', 'a', 'b', 'c']);
+
+      templateBind(testDiv.query('template'))
+          ..bindingDelegate = new PolymerExpressions()
+          ..model = model;
+
+      return new Future(() {
+        expect(testDiv.queryAll('div').map((n) => n.text), [
+          'Item 0 is hello',
+          'Item 1 is from',
+          'Item 2 is polymer',
+          'Item 3 is expressions',
+          'Item 4 is a',
+          'Item 5 is b',
+          'Item 6 is c',
+        ]);
+
+        model.removeAt(1);
+        model[1] = 'world';
+        model[2] = '!';
+        model.insert(5, 'e');
+
+        return new Future(() {
+          expect(testDiv.queryAll('div').map((n) => n.text), [
+            'Item 0 is hello',
+            'Item 1 is world',
+            'Item 2 is !',
+            'Item 3 is a',
+            'Item 4 is b',
+            'Item 5 is e',
+            'Item 6 is c',
+          ]);
+        });
+      });
+    });
+  });
+}