DIAL extension API skeleton.

chrome/test/data/extensions/api_test/dial/experimental/runtest.js

+// Copyright (c) 2012 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.
+
+// Array of each device list update.
+var devices = [];
+
+chrome.test.sendMessage('ready', function(message) {
+  if (message == 'setup') {
+    function handleOnDeviceList(deviceList) {
+      var newDevices = [];
+      for (var i = 0; i < deviceList.length; ++i) {
+        newDevices.push(deviceList[i]);
+      }
+      devices.push(newDevices);
+    }
+    chrome.dial.onDeviceList.addListener(handleOnDeviceList);
+
+    chrome.test.sendMessage('setup', function(message) {
+      if (message == 'go') {
+        chrome.test.runTests([
+          function testEvents() {
+            // Make sure there were 3 devices.
+            chrome.test.assertEq(3, devices.length);
+
+            // Make sure each update contained 1 more device than the previous.
+            for (var i = 0; i < devices.length; ++i) {
+              chrome.test.assertEq(i + 1, devices[i].length);
+            }
+
+            // Just check the first device in the first update and the last
+            // device in the last update.
+            // Not exposing the device id right now.
+            chrome.test.assertTrue(!('deviceId' in devices[0][0]));
+            chrome.test.assertEq("1", devices[0][0].deviceLabel);
+            chrome.test.assertEq("http://1",
+                                 devices[0][0].deviceDescriptionUrl);
+
+            chrome.test.assertTrue(!('deviceId' in devices[2][2]));
+            chrome.test.assertEq("3", devices[2][2].deviceLabel);
+            chrome.test.assertEq("http://3",
+                                 devices[2][2].deviceDescriptionUrl);
+
+            chrome.test.succeed();
+          }
+        ]);
+      }
+    });
+  }
+});