forked from mirrors/gecko-dev
63 lines
2.1 KiB
JavaScript
63 lines
2.1 KiB
JavaScript
ChromeUtils.defineESModuleGetters(this, {
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PromiseUtils: "resource://gre/modules/PromiseUtils.sys.mjs",
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});
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/* exported promiseTabLoadEvent, is_element_visible, is_element_hidden */
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/**
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* Waits for a load (or custom) event to finish in a given tab. If provided
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* load an uri into the tab.
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*
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* @param tab
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* The tab to load into.
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* @param [optional] url
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* The url to load, or the current url.
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* @return {Promise} resolved when the event is handled.
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* @resolves to the received event
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* @rejects if a valid load event is not received within a meaningful interval
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*/
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function promiseTabLoadEvent(tab, url) {
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let deferred = PromiseUtils.defer();
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info("Wait tab event: load");
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function handle(loadedUrl) {
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if (loadedUrl === "about:blank" || (url && loadedUrl !== url)) {
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info(`Skipping spurious load event for ${loadedUrl}`);
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return false;
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}
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info("Tab event received: load");
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return true;
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}
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// Create two promises: one resolved from the content process when the page
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// loads and one that is rejected if we take too long to load the url.
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let loaded = BrowserTestUtils.browserLoaded(tab.linkedBrowser, false, handle);
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let timeout = setTimeout(() => {
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deferred.reject(new Error("Timed out while waiting for a 'load' event"));
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}, 30000);
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loaded.then(() => {
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clearTimeout(timeout);
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deferred.resolve();
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});
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if (url) {
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BrowserTestUtils.loadURIString(tab.linkedBrowser, url);
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}
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// Promise.all rejects if either promise rejects (i.e. if we time out) and
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// if our loaded promise resolves before the timeout, then we resolve the
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// timeout promise as well, causing the all promise to resolve.
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return Promise.all([deferred.promise, loaded]);
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}
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function is_element_visible(element, msg) {
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isnot(element, null, "Element should not be null, when checking visibility");
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ok(BrowserTestUtils.is_visible(element), msg || "Element should be visible");
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}
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function is_element_hidden(element, msg) {
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isnot(element, null, "Element should not be null, when checking visibility");
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ok(BrowserTestUtils.is_hidden(element), msg || "Element should be hidden");
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}
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