Initial mojo spy skeleton based on tvcm

mojo/spy/ui/spy_test.js

Index: mojo/spy/ui/spy_test.js
diff --git a/mojo/spy/ui/spy_test.js b/mojo/spy/ui/spy_test.js
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+// Copyright (c) 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+'use strict';
+
+tvcm.require('ui.spy');
+tvcm.require('tvcm.event_target');
+
+tvcm.unittest.testSuite('ui.spy_test', function() {
+  /**
+   * @constructor
+   */
+  function FakeChannel() {
+    tvcm.EventTarget.call(this);
+  }
+
+  FakeChannel.prototype = {
+    __proto__: tvcm.EventTarget.prototype,
+
+    send: function(msg) {
+    },
+
+    dispatchMessage: function(msg) {
+      var event = new Event('message', false, false);
+      event.data = msg;
+      this.dispatchEvent(event);
+    }
+  };
+
+  test('basic', function() {
+    var channel = new FakeChannel();
+
+    var spy = new ui.Spy();
+    spy.style.width = '600px';
+    spy.style.height = '400px';
+    spy.style.border = '1px solid black';
+    this.addHTMLOutput(spy);
+    spy.channel = channel;
+
+    channel.dispatchMessage({data: 'alo there'});
+
+    // Fake out echo reply
+    channel.send = function(msg) {
+      setTimeout(function() {
+        channel.dispatchMessage({data: {type: 'reply', msg: msg}});
+      }, 10);
+    }
+  });
+
+});