Implement mocks for identity and host-list, add a browser test to test the app in various failure m…

remoting/webapp/browser_test/timeout_waiter.js

+// Copyright 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.
+
+/**
+ * @fileoverview
+ * Provide polling-based "wait for" functionality, and defines some useful
+ * predicates.
+ */
+
+'use strict';
+
+/** @suppress {duplicate} */
+var browserTest = browserTest || {};
+
+/** @enum {number} */
+browserTest.Timeout = {
+  NONE: -1,
+  DEFAULT: 5000
+};
+
+/** @interface */
+browserTest.Predicate = function() {};
+
+/** @return {boolean} */
+browserTest.Predicate.prototype.evaluate = function() {};
+
+/** @return {string} */
+browserTest.Predicate.prototype.description = function() {};
+
+/**
+ * @param {browserTest.Predicate} predicate
+ * @param {number=} opt_number

[kelvinp, 2015/01/08 22:54:41]

s/opt_timeout/opt_number  should also probably call out opt_timeout is in
milliseconds

[Jamie, 2015/01/08 23:43:08]

Done.

+ * @return {Promise}
+ */
+browserTest.waitFor = function(predicate, opt_timeout) {
+  return new Promise(function(fulfill, reject) {
+    if (opt_timeout === undefined) {
+      opt_timeout = browserTest.Timeout.DEFAULT;
+    }
+    var end = Number(new Date()) + opt_timeout;
+    var testPredicate = function() {
+      if (predicate.evaluate()) {
+        console.log(predicate.description() + ' satisfied.');
+        fulfill();
+      } else if (Number(new Date()) >= end) {
+        reject(new Error('Timed out (' + opt_timeout + 'ms) waiting for ' +
+                         predicate.description()));
+      } else {
+        console.log(predicate.description() + ' not yet satisfied.');
+        window.setTimeout(testPredicate, 500);
+      }
+    };
+    testPredicate();
+  });
+};
+
+/**
+ * @param {string} id
+ * @return {browserTest.Predicate}
+ */
+browserTest.isVisible = function(id) {
+  var element = document.getElementById(id);
+  browserTest.expect(element, 'No such element: ' + id);
+  return {
+    evaluate: function() {
+      return element.getBoundingClientRect().width != 0;

[kelvinp, 2015/01/08 22:54:41]

Just want to call out that this check will not work for scenarios when an
element is hidden by using (visibility:none) as it will still participate in
layout.  

I don't think this will be a problem for now as we always hide element with
display:none.

[Jamie, 2015/01/08 23:43:08]

Ack.

+    },
+    description: function() {
+      return 'isVisible(' + id + ')';
+    }
+  };
+};
+
+/**
+ * @param {string} id
+ * @return {browserTest.Predicate}
+ */
+browserTest.isEnabled = function(id) {
+  var element = document.getElementById(id);
+  browserTest.expect(element, 'No such element: ' + id);
+  return {
+    evaluate: function() {
+      return !element.disabled;
+    },
+    description: function() {
+      return 'isEnabled(' + id + ')';
+    }
+  };
+};