const baseURL = getRootDirectory(gTestPath).replace( "chrome://mochitests/content", "http://example.com" ); const alertURL = `${baseURL}file_bug1682866.html`; add_task(async function testAlertForceClosed() { let tab = await BrowserTestUtils.openNewForegroundTab( gBrowser, alertURL, true /* waitForLoad */ ); // Open a second which is in the same process as tab let secondTabIsLoaded = BrowserTestUtils.waitForNewTab( gBrowser, alertURL, true, false ); let isSuspendedAfterAlert = await SpecialPowers.spawn( tab.linkedBrowser.browsingContext, [alertURL], url => { content.open(url); var utils = SpecialPowers.getDOMWindowUtils(content); return utils.isInputTaskManagerSuspended; } ); await secondTabIsLoaded; let secondTab = gBrowser.tabs[2]; is( isSuspendedAfterAlert, Services.prefs.getBoolPref("dom.input_events.canSuspendInBCG.enabled"), "InputTaskManager should be suspended because alert is opened" ); let alertClosed = BrowserTestUtils.waitForEvent( tab.linkedBrowser, "DOMModalDialogClosed" ); BrowserTestUtils.loadURIString(tab.linkedBrowser, "about:newtab"); await BrowserTestUtils.browserLoaded(tab.linkedBrowser); await alertClosed; gBrowser.removeTab(tab); gBrowser.removeTab(secondTab); });