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-<!DOCTYPE html>
-<html>
-<!--
-Copyright 2011 The Closure Library Authors. All Rights Reserved.
-
-Use of this source code is governed by the Apache License, Version 2.0.
-See the COPYING file for details.
--->
-<!--
--->
-<head>
-<meta http-equiv="X-UA-Compatible" content="IE=edge">
-<title>Closure Unit Tests - goog.net.WebSocket</title>
-<script type="text/javascript" src="../base.js"></script>
-<script type="text/javascript">
- goog.require('goog.debug.EntryPointMonitor');
- goog.require('goog.debug.ErrorHandler');
- goog.require('goog.debug.entryPointRegistry');
- goog.require('goog.events');
- goog.require('goog.functions');
- goog.require('goog.net.WebSocket');
- goog.require('goog.net.WebSocket.EventType');
- goog.require('goog.testing.MockClock');
- goog.require('goog.testing.PropertyReplacer');
- goog.require('goog.testing.jsunit');
- goog.require('goog.testing.recordFunction');
-</script>
-</head>
-<body>
-
-<!-- Define unit tests. -->
-<script type="text/javascript" >
-
-var webSocket;
-var mockClock;
-var pr;
-var testUrl;
-
-var originalOnOpen = goog.net.WebSocket.prototype.onOpen_;
-var originalOnClose = goog.net.WebSocket.prototype.onClose_;
-var originalOnMessage = goog.net.WebSocket.prototype.onMessage_;
-var originalOnError = goog.net.WebSocket.prototype.onError_;
-
-function setUp() {
- pr = new goog.testing.PropertyReplacer();
- pr.set(goog.global, 'WebSocket', MockWebSocket);
- mockClock = new goog.testing.MockClock(true);
- testUrl = 'ws://127.0.0.1:4200';
- testProtocol = 'xmpp';
-}
-
-function tearDown() {
- pr.reset();
- goog.net.WebSocket.prototype.onOpen_ = originalOnOpen;
- goog.net.WebSocket.prototype.onClose_ = originalOnClose;
- goog.net.WebSocket.prototype.onMessage_ = originalOnMessage;
- goog.net.WebSocket.prototype.onError_ = originalOnError;
- goog.dispose(mockClock);
- goog.dispose(webSocket);
-}
-
-function testOpenInUnsupportingBrowserThrowsException() {
- // Null out WebSocket to simulate lack of support.
- if (goog.global.WebSocket) {
- goog.global.WebSocket = null;
- }
-
- webSocket = new goog.net.WebSocket();
- assertThrows('Open should fail if WebSocket is not defined.',
- function() {
- webSocket.open(testUrl);
- });
-}
-
-function testOpenTwiceThrowsException() {
- webSocket = new goog.net.WebSocket();
- webSocket.open(testUrl);
- simulateOpenEvent(webSocket.webSocket_);
-
- assertThrows('Attempting to open a second time should fail.',
- function() {
- webSocket.open(testUrl);
- });
-}
-
-function testSendWithoutOpeningThrowsException() {
- webSocket = new goog.net.WebSocket();
-
- assertThrows('Send should fail if the web socket was not first opened.',
- function() {
- webSocket.send('test message');
- });
-}
-
-function testOpenWithProtocol() {
- webSocket = new goog.net.WebSocket();
- webSocket.open(testUrl, testProtocol);
- var ws = webSocket.webSocket_;
- simulateOpenEvent(ws);
- assertEquals(testUrl, ws.url);
- assertEquals(testProtocol, ws.protocol);
-}
-
-function testOpenAndClose() {
- webSocket = new goog.net.WebSocket();
- assertFalse(webSocket.isOpen());
- webSocket.open(testUrl);
- var ws = webSocket.webSocket_;
- simulateOpenEvent(ws);
- assertTrue(webSocket.isOpen());
- assertEquals(testUrl, ws.url);
- webSocket.close();
- simulateCloseEvent(ws);
- assertFalse(webSocket.isOpen());
-}
-
-function testReconnectionDisabled() {
- // Construct the web socket and disable reconnection.
- webSocket = new goog.net.WebSocket(false);
-
- // Record how many times open is called.
- pr.set(webSocket, 'open', goog.testing.recordFunction(webSocket.open));
-
- // Open the web socket.
- webSocket.open(testUrl);
- assertEquals(0, webSocket.reconnectAttempt_);
- assertEquals(1, webSocket.open.getCallCount());
- assertFalse(webSocket.isOpen());
-
- // Simulate failure.
- var ws = webSocket.webSocket_;
- simulateCloseEvent(ws);
- assertFalse(webSocket.isOpen());
- assertEquals(0, webSocket.reconnectAttempt_);
- assertEquals(1, webSocket.open.getCallCount());
-
- // Make sure a reconnection doesn't happen.
- mockClock.tick(100000);
- assertEquals(0, webSocket.reconnectAttempt_);
- assertEquals(1, webSocket.open.getCallCount());
-}
-
-function testReconnectionWithFailureOnFirstOpen() {
- // Construct the web socket with a linear back-off.
- webSocket = new goog.net.WebSocket(true, linearBackOff);
-
- // Record how many times open is called.
- pr.set(webSocket, 'open', goog.testing.recordFunction(webSocket.open));
-
- // Open the web socket.
- webSocket.open(testUrl, testProtocol);
- assertEquals(0, webSocket.reconnectAttempt_);
- assertEquals(1, webSocket.open.getCallCount());
- assertFalse(webSocket.isOpen());
-
- // Simulate failure.
- var ws = webSocket.webSocket_;
- simulateCloseEvent(ws);
- assertFalse(webSocket.isOpen());
- assertEquals(1, webSocket.reconnectAttempt_);
- assertEquals(1, webSocket.open.getCallCount());
-
- // Make sure the reconnect doesn't happen before it should.
- mockClock.tick(linearBackOff(0) - 1);
- assertEquals(1, webSocket.open.getCallCount());
- mockClock.tick(1);
- assertEquals(2, webSocket.open.getCallCount());
-
- // Simulate another failure.
- simulateCloseEvent(ws);
- assertFalse(webSocket.isOpen());
- assertEquals(2, webSocket.reconnectAttempt_);
- assertEquals(2, webSocket.open.getCallCount());
-
- // Make sure the reconnect doesn't happen before it should.
- mockClock.tick(linearBackOff(1) - 1);
- assertEquals(2, webSocket.open.getCallCount());
- mockClock.tick(1);
- assertEquals(3, webSocket.open.getCallCount());
-
- // Simulate connection success.
- simulateOpenEvent(ws);
- assertEquals(0, webSocket.reconnectAttempt_);
- assertEquals(3, webSocket.open.getCallCount());
-
- // Make sure the reconnection has the same url and protocol.
- assertEquals(testUrl, ws.url);
- assertEquals(testProtocol, ws.protocol);
-
- // Ensure no further calls to open are made.
- mockClock.tick(linearBackOff(10));
- assertEquals(3, webSocket.open.getCallCount());
-}
-
-function testReconnectionWithFailureAfterOpen() {
- // Construct the web socket with a linear back-off.
- webSocket = new goog.net.WebSocket(true, fibonacciBackOff);
-
- // Record how many times open is called.
- pr.set(webSocket, 'open', goog.testing.recordFunction(webSocket.open));
-
- // Open the web socket.
- webSocket.open(testUrl);
- assertEquals(0, webSocket.reconnectAttempt_);
- assertEquals(1, webSocket.open.getCallCount());
- assertFalse(webSocket.isOpen());
-
- // Simulate connection success.
- var ws = webSocket.webSocket_;
- simulateOpenEvent(ws);
- assertEquals(0, webSocket.reconnectAttempt_);
- assertEquals(1, webSocket.open.getCallCount());
-
- // Let some time pass, then fail the connection.
- mockClock.tick(100000);
- simulateCloseEvent(ws);
- assertFalse(webSocket.isOpen());
- assertEquals(1, webSocket.reconnectAttempt_);
- assertEquals(1, webSocket.open.getCallCount());
-
- // Make sure the reconnect doesn't happen before it should.
- mockClock.tick(fibonacciBackOff(0) - 1);
- assertEquals(1, webSocket.open.getCallCount());
- mockClock.tick(1);
- assertEquals(2, webSocket.open.getCallCount());
-
- // Simulate connection success.
- ws = webSocket.webSocket_;
- simulateOpenEvent(ws);
- assertEquals(0, webSocket.reconnectAttempt_);
- assertEquals(2, webSocket.open.getCallCount());
-
- // Ensure no further calls to open are made.
- mockClock.tick(fibonacciBackOff(10));
- assertEquals(2, webSocket.open.getCallCount());
-}
-
-function testExponentialBackOff() {
- assertEquals(1000, goog.net.WebSocket.EXPONENTIAL_BACKOFF_(0));
- assertEquals(2000, goog.net.WebSocket.EXPONENTIAL_BACKOFF_(1));
- assertEquals(4000, goog.net.WebSocket.EXPONENTIAL_BACKOFF_(2));
- assertEquals(60000, goog.net.WebSocket.EXPONENTIAL_BACKOFF_(6));
- assertEquals(60000, goog.net.WebSocket.EXPONENTIAL_BACKOFF_(7));
-}
-
-function testEntryPointRegistry() {
- var monitor = new goog.debug.EntryPointMonitor();
- var replacement = function() {};
- monitor.wrap = goog.testing.recordFunction(
- goog.functions.constant(replacement));
-
- goog.debug.entryPointRegistry.monitorAll(monitor);
- assertTrue(monitor.wrap.getCallCount() >= 1);
- assertEquals(replacement, goog.net.WebSocket.prototype.onOpen_);
- assertEquals(replacement, goog.net.WebSocket.prototype.onClose_);
- assertEquals(replacement, goog.net.WebSocket.prototype.onMessage_);
- assertEquals(replacement, goog.net.WebSocket.prototype.onError_);
-}
-
-function testErrorHandlerCalled() {
- var errorHandlerCalled = false;
- var errorHandler = new goog.debug.ErrorHandler(function() {
- errorHandlerCalled = true;
- });
- goog.net.WebSocket.protectEntryPoints(errorHandler);
-
- webSocket = new goog.net.WebSocket();
- goog.events.listenOnce(webSocket, goog.net.WebSocket.EventType.OPENED,
- function() {
- throw Error();
- });
-
- webSocket.open(testUrl);
- var ws = webSocket.webSocket_;
- assertThrows(function() {
- simulateOpenEvent(ws);
- });
-
- assertTrue('Error handler callback should be called when registered as ' +
- 'protecting the entry points.', errorHandlerCalled);
-}
-
-/**
- * Simulates the browser firing the open event for the given web socket.
- * @param {MockWebSocket} ws The mock web socket.
- */
-function simulateOpenEvent(ws) {
- ws.readyState = goog.net.WebSocket.ReadyState_.OPEN;
- ws.onopen();
-}
-
-/**
- * Simulates the browser firing the close event for the given web socket.
- * @param {MockWebSocket} ws The mock web socket.
- */
-function simulateCloseEvent(ws) {
- ws.readyState = goog.net.WebSocket.ReadyState_.CLOSED;
- ws.onclose({data: 'mock close event'});
-}
-
-/**
- * Strategy for reconnection that backs off linearly with a 1 second offset.
- * @param {number} attempt The number of reconnects since the last connection.
- * @return {number} The amount of time to the next reconnect, in milliseconds.
- */
-function linearBackOff(attempt) {
- return (attempt * 1000) + 1000;
-}
-
-/**
- * Strategy for reconnection that backs off with the fibonacci pattern. It is
- * offset by 5 seconds so the first attempt will happen after 5 seconds.
- * @param {number} attempt The number of reconnects since the last connection.
- * @return {number} The amount of time to the next reconnect, in milliseconds.
- */
-function fibonacciBackOff(attempt) {
- return (fibonacci(attempt) * 1000) + 5000;
-}
-
-/**
- * Computes the desired fibonacci number.
- * @param {number} n The nth desired fibonacci number.
- * @return {number} The nth fibonacci number.
- */
-function fibonacci(n) {
- if (n == 0) {
- return 0;
- } else if (n == 1) {
- return 1;
- } else {
- return fibonacci(n - 2) + fibonacci(n - 1);
- }
-}
-
-
-
-/**
- * Mock WebSocket constructor.
- * @param {string} url The url to the web socket server.
- * @param {string} protocol The protocol to use.
- * @constructor
- */
-MockWebSocket = function(url, protocol) {
- this.url = url;
- this.protocol = protocol;
- this.readyState = goog.net.WebSocket.ReadyState_.CONNECTING;
-};
-
-
-/**
- * Mocks out the close method of the WebSocket.
- */
-MockWebSocket.prototype.close = function() {
- this.readyState = goog.net.WebSocket.ReadyState_.CLOSING;
-};
-
-
-/**
- * Mocks out the send method of the WebSocket.
- */
-MockWebSocket.prototype.send = function() {
- // Nothing to do here.
-};
-
-</script>
-</body>
-</html>