Roll Observatory packages and add a roll script

packages/charted/test.disabled/event/timer_test.dart

+/*
+ * Copyright 2014 Google Inc. All rights reserved.
+ *
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the LICENSE file or at
+ * https://developers.google.com/open-source/licenses/bsd
+ */
+
+part of charted.test.event;
+
+class MockFlag {
+  static const IDLE = 0;
+  static const STARTED = 1;
+  static const FINISHED = 2;
+  int state = IDLE;
+}
+
+testTimer() {
+  const TIME_BIAS = 50;
+
+  // Set flag property of a MockFlag to true after a time span.
+  timeSpan(t, MockFlag mock) => (elapse) {
+    if (mock.state == MockFlag.IDLE) mock.state = MockFlag.STARTED;
+    if (elapse < t) return false;
+    mock.state = MockFlag.FINISHED;
+    return true;
+  };
+
+  test('ChartTimer starts a custom animation timer after specific delay', () {
+    MockFlag mock1 = new MockFlag(),
+             mock2 = new MockFlag(),
+             mock3 = new MockFlag();
+    // Timer with 200 duration of execution.
+    new ChartTimer(timeSpan(200, mock1));
+    // Timer with 200 duration of execution and 200 delay.
+    new ChartTimer(timeSpan(200, mock2), 200);
+    // Timer with 200 duration of execution and 200 delay after 200 from now.
+    new ChartTimer(timeSpan(200, mock3), 200,
+        new DateTime.now().add(new Duration(milliseconds: 200)));
+    new Timer(new Duration(milliseconds:200 - TIME_BIAS), expectAsync(() {
+      expect(mock1.state, equals(MockFlag.STARTED));
+      expect(mock2.state, equals(MockFlag.IDLE));
+      expect(mock3.state, equals(MockFlag.IDLE));
+    }));
+    new Timer(new Duration(milliseconds:200 + TIME_BIAS), expectAsync(() {
+      expect(mock1.state, equals(MockFlag.FINISHED));
+      expect(mock2.state, equals(MockFlag.STARTED));
+      expect(mock3.state, equals(MockFlag.IDLE));
+    }));
+    new Timer(new Duration(milliseconds:400 + TIME_BIAS), expectAsync(() {
+      expect(mock1.state, equals(MockFlag.FINISHED));
+      expect(mock2.state, equals(MockFlag.FINISHED));
+      expect(mock3.state, equals(MockFlag.STARTED));
+    }));
+    new Timer(new Duration(milliseconds:600 + TIME_BIAS), expectAsync(() {
+      expect(mock1.state, equals(MockFlag.FINISHED));
+      expect(mock2.state, equals(MockFlag.FINISHED));
+      expect(mock3.state, equals(MockFlag.FINISHED));
+    }));
+  });
+}