Implement Chrome Extension TabCapture API.

chrome/test/data/extensions/api_test/tab_capture/experimental/test.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.
+
+var tabCapture = chrome.tabCapture;
+
+chrome.test.runTests([
+
+  function captureInvalidTab() {
+    var tabMediaRequestCallback = function(stream) {
+      chrome.test.assertEq(undefined, stream);
+      chrome.test.assertLastError('Could not find the specified tab.');
+      chrome.test.succeed();
+    };
+
+    tabCapture.capture(-1, {audio: true, video: true},
+      tabMediaRequestCallback);
+  },
+
+  function captureTabAndVerifyStateTransitions() {
+    var tabId = -1;
+    // Tab capture events in the order they happen.
+    var tabCaptureEvents = [];
+
+    var tabMediaRequestCallback = function(stream) {
+      chrome.test.assertTrue(stream !== undefined);
+      stream.stop();
+    };
+
+    var tabCaptureListener = function(info) {
+      chrome.test.assertEq(tabId, info.tabId);
+      console.log(info.status);
+      if (info.status == 'stopped') {
+        chrome.test.assertEq('active', tabCaptureEvents.pop());
+        chrome.test.assertEq('pending', tabCaptureEvents.pop());
+        chrome.test.assertEq('requested', tabCaptureEvents.pop());
+        chrome.test.succeed();
+        return;
+      }
+      tabCaptureEvents.push(info.status);
+    }
+
+    tabCapture.onStatusChanged.addListener(tabCaptureListener);
+
+    var gotTabId = function(tab) {
+      tabId = tab[0].id;
+      console.log('using tab: ' + tabId);
+      tabCapture.capture(tabId, {audio: true, video: true},
+        tabMediaRequestCallback);
+    };
+    chrome.tabs.query({active: true}, gotTabId);
+  },
+
+  function getCapturedTabs() {
+    var tabId = -1;
+    var activeStream = null;
+
+    var capturedTabsAfterClose = function(infos) {
+      chrome.test.assertEq(1, infos.length);
+      chrome.test.assertEq(tabId, infos[0].tabId);
+      chrome.test.assertEq('stopped', infos[0].status);
+      chrome.test.succeed();
+    }
+
+    var capturedTabsAfterOpen = function(infos) {
+      chrome.test.assertEq(1, infos.length);
+      chrome.test.assertEq(tabId, infos[0].tabId);
+      chrome.test.assertEq('active', infos[0].status);
+      activeStream.stop();
+    }
+
+    var tabMediaRequestCallback = function(stream) {
+      chrome.test.assertTrue(stream !== undefined);
+      activeStream = stream;
+      tabCapture.getCapturedTabs(capturedTabsAfterOpen);
+    };
+
+    var gotTabId = function(tab) {
+      tabId = tab[0].id;
+      console.log('using tab: ' + tabId);
+      tabCapture.capture(tabId, {audio: true, video: true},
+        tabMediaRequestCallback);
+    };
+    chrome.tabs.query({active: true}, gotTabId);
+  },
+
+  function captureSameTab() {
+    var tabId = -1;
+    var stream1 = null;
+
+    var tabMediaRequestCallback2 = function(stream) {
+      chrome.test.assertLastError(
+          'Cannot capture a tab with an active stream.');
+      chrome.test.assertTrue(stream === undefined);
+      stream1.stop();
+      chrome.test.succeed();
+    };
+
+    var tabMediaRequestCallback = function(stream) {
+      chrome.test.assertTrue(stream !== undefined);
+      stream1 = stream;
+      tabCapture.capture(tabId, {audio: true, video: true},
+        tabMediaRequestCallback2);
+    };
+
+    var gotTabId = function(tab) {
+      tabId = tab[0].id;
+      console.log('using tab: ' + tabId);
+      tabCapture.capture(tabId, {audio: true, video: true},
+        tabMediaRequestCallback);
+    };
+    chrome.tabs.query({active: true}, gotTabId);
+  },
+
+]);