const VIDEO_PAGE = GetTestWebBasedURL("file_video.html"); function setup_test_preference(enableUserGesture) { let state = enableUserGesture ? "enable" : "disable"; info(`- set pref : ${state} user gesture -`); return SpecialPowers.pushPrefEnv({ set: [ ["media.autoplay.default", SpecialPowers.Ci.nsIAutoplay.BLOCKED], ["media.autoplay.blocking_policy", enableUserGesture ? 0 : 1], ], }); } async function allow_play_for_played_video() { info("- open new tab -"); let tab = await BrowserTestUtils.openNewForegroundTab( window.gBrowser, "about:blank" ); BrowserTestUtils.loadURIString(tab.linkedBrowser, VIDEO_PAGE); await BrowserTestUtils.browserLoaded(tab.linkedBrowser); info("- simulate user-click to start video -"); await BrowserTestUtils.synthesizeMouseAtCenter( "#v", { button: 0 }, tab.linkedBrowser ); async function play_video_again() { let video = content.document.getElementById("v"); ok(!video.paused, "video is playing"); info("- call video play() again -"); try { await video.play(); ok(true, "success to resolve play promise"); } catch (e) { ok(false, "promise should not be rejected"); } } await SpecialPowers.spawn(tab.linkedBrowser, [], play_video_again); info("- remove tab -"); BrowserTestUtils.removeTab(tab); } add_task(async function start_test() { await setup_test_preference(true); await allow_play_for_played_video(); await setup_test_preference(false); await allow_play_for_played_video(); });