mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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88 lines
3.3 KiB
JavaScript
88 lines
3.3 KiB
JavaScript
// Utilities for running tests in an e10s environment.
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// There are some tricks/shortcuts that test code takes that we don't see
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// in the real browser code. These include setting content.location.href
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// (which doesn't work in test code with e10s enabled as the document object
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// is yet to be created), waiting for certain events the main browser doesn't
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// care about and so doesn't normally get special support, eg, the "pageshow"
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// or "load" events).
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// So we make some hacks to pretend these work in the test suite.
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// Ideally all these hacks could be removed, but this can only happen when
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// the tests are refactored to not use these tricks. But this would be a huge
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// amount of work and is unlikely to happen anytime soon...
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const CONTENT_URL = "chrome://mochikit/content/mochitest-e10s-utils-content.js";
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// This is an object that is used as the "location" on a remote document or
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// window. It will be overwritten as the real document and window are made
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// available.
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let locationStub = function(browser) {
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this.browser = browser;
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};
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locationStub.prototype = {
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get href() {
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return this.browser.webNavigation.currentURI.spec;
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},
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set href(val) {
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this.browser.loadURI(val);
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},
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assign: function(url) {
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this.href = url;
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}
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};
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// This object is used in place of contentWindow while we wait for it to be
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// overwritten as the real window becomes available.
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let TemporaryWindowStub = function(browser) {
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this._locationStub = new locationStub(browser);
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};
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TemporaryWindowStub.prototype = {
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// save poor developers from getting confused about why the window isn't
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// working like a window should..
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toString: function() {
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return "[Window Stub for e10s tests]";
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},
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get location() {
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return this._locationStub;
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},
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set location(val) {
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this._locationStub.href = val;
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},
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get document() {
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// so tests can say: document.location....
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return this;
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}
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};
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// An observer called when a new remote browser element is created. We replace
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// the _contentWindow in new browsers with our TemporaryWindowStub object.
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function observeNewFrameloader(subject, topic, data) {
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let browser = subject.QueryInterface(Ci.nsIFrameLoader).ownerElement;
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browser._contentWindow = new TemporaryWindowStub(browser);
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}
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function e10s_init() {
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// Use the global message manager to inject a content script into all browsers.
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let globalMM = Cc["@mozilla.org/globalmessagemanager;1"]
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.getService(Ci.nsIMessageListenerManager);
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globalMM.loadFrameScript(CONTENT_URL, true);
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globalMM.addMessageListener("Test:Event", function(message) {
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let event = document.createEvent('HTMLEvents');
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event.initEvent(message.data.name, true, true, {});
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message.target.dispatchEvent(event);
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});
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// We add an observer so we can notice new <browser> elements created
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Services.obs.addObserver(observeNewFrameloader, "remote-browser-shown", false);
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// Listen for an 'oop-browser-crashed' event and log it so people analysing
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// test logs have a clue about what is going on.
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window.addEventListener("oop-browser-crashed", (event) => {
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let uri = event.target.currentURI;
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Cu.reportError("remote browser crashed while on " +
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(uri ? uri.spec : "<unknown>") + "\n");
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}, true);
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}
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