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-rw-r--r--testing/mochitest/tests/browser/browser_browserLoaded_content_loaded.js53
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diff --git a/testing/mochitest/tests/browser/browser_browserLoaded_content_loaded.js b/testing/mochitest/tests/browser/browser_browserLoaded_content_loaded.js
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index 0000000000..fa29e03d23
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+++ b/testing/mochitest/tests/browser/browser_browserLoaded_content_loaded.js
@@ -0,0 +1,53 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+function isDOMLoaded(browser) {
+ return SpecialPowers.spawn(browser, [], async function () {
+ Assert.equal(
+ content.document.readyState,
+ "complete",
+ "Browser should be loaded."
+ );
+ });
+}
+
+// It checks if calling BrowserTestUtils.browserLoaded() yields
+// browser object.
+add_task(async function () {
+ let tab = BrowserTestUtils.addTab(gBrowser, "http://example.com");
+ let browser = tab.linkedBrowser;
+ await BrowserTestUtils.browserLoaded(browser);
+ await isDOMLoaded(browser);
+ gBrowser.removeTab(tab);
+});
+
+// It checks that BrowserTestUtils.browserLoaded() works well with
+// promise.all().
+add_task(async function () {
+ let tabURLs = [
+ `http://example.org`,
+ `http://mochi.test:8888`,
+ `http://test:80`,
+ ];
+ // Add tabs, get the respective browsers
+ let browsers = tabURLs.map(
+ u => BrowserTestUtils.addTab(gBrowser, u).linkedBrowser
+ );
+
+ // wait for promises to settle
+ await Promise.all(
+ (function* () {
+ for (let b of browsers) {
+ yield BrowserTestUtils.browserLoaded(b);
+ }
+ })()
+ );
+ for (const browser of browsers) {
+ await isDOMLoaded(browser);
+ }
+ // cleanup
+ browsers
+ .map(browser => gBrowser.getTabForBrowser(browser))
+ .forEach(tab => gBrowser.removeTab(tab));
+});