The Tor Browser: comparison image/test/unit/async_load_tests.js

comparison: image/test/unit/async_load_tests.js

image/test/unit/async_load_tests.js

branch: TOR_BUG_9701
changeset 15: b8a032363ba2

equal deleted inserted replaced

--1:000000000000
+:8105fc9f1a80
+/*
+* Test to ensure that image loading/decoding notifications are always
+* delivered async, and in the order we expect.
+*
+* Must be included from a file that has a uri of the image to test defined in
+* var uri.
+*/
+const Cc = Components.classes;
+const Ci = Components.interfaces;
+const Cu = Components.utils;
+const Cr = Components.results;
+Cu.import("resource://testing-common/httpd.js");
+var server = new HttpServer();
+server.registerDirectory("/", do_get_file(''));
+server.registerContentType("sjs", "sjs");
+server.start(-1);
+load('image_load_helpers.js');
+var requests = [];
+// Return a closure that holds on to the listener from the original
+// imgIRequest, and compares its results to the cloned one.
+function getCloneStopCallback(original_listener)
+{
+return function cloneStop(listener) {
+do_check_eq(original_listener.state, listener.state);
+// Sanity check to make sure we didn't accidentally use the same listener
+// twice.
+do_check_neq(original_listener, listener);
+do_test_finished();
+}
+}
+// Make sure that cloned requests get all the same callbacks as the original,
+// but they aren't synchronous right now.
+function checkClone(other_listener, aRequest)
+{
+do_test_pending();
+// For as long as clone notification is synchronous, we can't test the clone state reliably.
+var listener = new ImageListener(null, function(foo, bar) { do_test_finished(); } /*getCloneStopCallback(other_listener)*/);
+listener.synchronous = false;
+var outer = Cc["@mozilla.org/image/tools;1"].getService(Ci.imgITools)
+.createScriptedObserver(listener);
+var clone = aRequest.clone(outer);
+requests.push(clone);
+}
+// Ensure that all the callbacks were called on aRequest.
+function checkSizeAndLoad(listener, aRequest)
+{
+do_check_neq(listener.state & SIZE_AVAILABLE, 0);
+do_check_neq(listener.state & LOAD_COMPLETE, 0);
+do_test_finished();
+}
+function secondLoadDone(oldlistener, aRequest)
+{
+do_test_pending();
+try {
+var staticrequest = aRequest.getStaticRequest();
+// For as long as clone notification is synchronous, we can't test the
+// clone state reliably.
+var listener = new ImageListener(null, checkSizeAndLoad);
+listener.synchronous = false;
+var outer = Cc["@mozilla.org/image/tools;1"].getService(Ci.imgITools)
+.createScriptedObserver(listener);
+var staticrequestclone = staticrequest.clone(outer);
+requests.push(staticrequestclone);
+} catch(e) {
+// We can't create a static request. Most likely the request we started
+// with didn't load successfully.
+do_test_finished();
+}
+run_loadImageWithChannel_tests();
+do_test_finished();
+}
+// Load the request a second time. This should come from the image cache, and
+// therefore would be at most risk of being served synchronously.
+function checkSecondLoad()
+{
+do_test_pending();
+var listener = new ImageListener(checkClone, secondLoadDone);
+var outer = Cc["@mozilla.org/image/tools;1"].getService(Ci.imgITools)
+.createScriptedObserver(listener);
+requests.push(gCurrentLoader.loadImageXPCOM(uri, null, null, null, null, outer, null, 0, null, null));
+listener.synchronous = false;
+}
+function firstLoadDone(oldlistener, aRequest)
+{
+checkSecondLoad(uri);
+do_test_finished();
+}
+// Return a closure that allows us to check the stream listener's status when the
+// image starts loading.
+function getChannelLoadImageStartCallback(streamlistener)
+{
+return function channelLoadStart(imglistener, aRequest) {
+// We must not have received all status before we get this start callback.
+// If we have, we've broken people's expectations by delaying events from a
+// channel we were given.
+do_check_eq(streamlistener.requestStatus & STOP_REQUEST, 0);
+checkClone(imglistener, aRequest);
+}
+}
+// Return a closure that allows us to check the stream listener's status when the
+// image finishes loading.
+function getChannelLoadImageStopCallback(streamlistener, next)
+{
+return function channelLoadStop(imglistener, aRequest) {
+next();
+do_test_finished();
+}
+}
+// Load the request a second time. This should come from the image cache, and
+// therefore would be at most risk of being served synchronously.
+function checkSecondChannelLoad()
+{
+do_test_pending();
+var ioService = Cc["@mozilla.org/network/io-service;1"].getService(Ci.nsIIOService);
+var channel = ioService.newChannelFromURI(uri);
+var channellistener = new ChannelListener();
+channel.asyncOpen(channellistener, null);
+var listener = new ImageListener(getChannelLoadImageStartCallback(channellistener),
+getChannelLoadImageStopCallback(channellistener,
+all_done_callback));
+var outer = Cc["@mozilla.org/image/tools;1"].getService(Ci.imgITools)
+.createScriptedObserver(listener);
+var outlistener = {};
+requests.push(gCurrentLoader.loadImageWithChannelXPCOM(channel, outer, null, outlistener));
+channellistener.outputListener = outlistener.value;
+listener.synchronous = false;
+}
+function run_loadImageWithChannel_tests()
+{
+// To ensure we're testing what we expect to, create a new loader and cache.
+gCurrentLoader = Cc["@mozilla.org/image/loader;1"].createInstance(Ci.imgILoader);
+do_test_pending();
+var ioService = Cc["@mozilla.org/network/io-service;1"].getService(Ci.nsIIOService);
+var channel = ioService.newChannelFromURI(uri);
+var channellistener = new ChannelListener();
+channel.asyncOpen(channellistener, null);
+var listener = new ImageListener(getChannelLoadImageStartCallback(channellistener),
+getChannelLoadImageStopCallback(channellistener,
+checkSecondChannelLoad));
+var outer = Cc["@mozilla.org/image/tools;1"].getService(Ci.imgITools)
+.createScriptedObserver(listener);
+var outlistener = {};
+requests.push(gCurrentLoader.loadImageWithChannelXPCOM(channel, outer, null, outlistener));
+channellistener.outputListener = outlistener.value;
+listener.synchronous = false;
+}
+function all_done_callback()
+{
+server.stop(function() { do_test_finished(); });
+}
+function startImageCallback(otherCb)
+{
+return function(listener, request)
+{
+// Make sure we can load the same image immediately out of the cache.
+do_test_pending();
+var listener2 = new ImageListener(null, function(foo, bar) { do_test_finished(); });
+var outer = Cc["@mozilla.org/image/tools;1"].getService(Ci.imgITools)
+.createScriptedObserver(listener2);
+requests.push(gCurrentLoader.loadImageXPCOM(uri, null, null, null, null, outer, null, 0, null, null));
+listener2.synchronous = false;
+// Now that we've started another load, chain to the callback.
+otherCb(listener, request);
+}
+}
+var gCurrentLoader;
+function cleanup()
+{
+for (var i = 0; i < requests.length; ++i) {
+requests[i].cancelAndForgetObserver(0);
+}
+}
+function run_test()
+{
+do_register_cleanup(cleanup);
+gCurrentLoader = Cc["@mozilla.org/image/loader;1"].createInstance(Ci.imgILoader);
+do_test_pending();
+var listener = new ImageListener(startImageCallback(checkClone), firstLoadDone);
+var outer = Cc["@mozilla.org/image/tools;1"].getService(Ci.imgITools)
+.createScriptedObserver(listener);
+var req = gCurrentLoader.loadImageXPCOM(uri, null, null, null, null, outer, null, 0, null, null);
+requests.push(req);
+// Ensure that we don't cause any mayhem when we lock an image.
+req.lockImage();
+listener.synchronous = false;
+}