<!doctype html> <html> <head> <title>Assigning a MediaStream to a media element and not playing it results in rendering a first frame</title> </head> <body> <p class="instructions">When prompted, accept to share your video stream.</p> <h1 class="instructions">Description</h1> <p class="instructions">This test checks that a HTMLMediaElement with an assigned MediaStream with a video track fires the appropriate events to reach the "canplay" event and readyState HAVE_ENOUGH_DATA even when not playing or autoplaying.</p> <video id="vid"></video> <script src=/resources/testharness.js></script> <script src=/resources/testharnessreport.js></script> <script src=/resources/testdriver.js></script> <script src=/resources/testdriver-vendor.js></script> <script src=permission-helper.js></script> <script> 'use strict'; const vid = document.getElementById("vid"); promise_test(async t => { const wait = ms => new Promise(r => t.step_timeout(r, ms)); const timeout = (promise, time, msg) => Promise.race([ promise, wait(time).then(() => Promise.reject(new Error(msg))) ]); await setMediaPermission("granted", ["camera"]); const stream = await navigator.mediaDevices.getUserMedia({video: true}); t.add_cleanup(() => stream.getTracks().forEach(track => track.stop())); vid.srcObject = stream; await timeout(new Promise(r => vid.oncanplay = r), 8000, "canplay timeout"); assert_equals(vid.readyState, vid.HAVE_ENOUGH_DATA, "readyState is HAVE_ENOUGH_DATA after \"canplay\""); }, "Tests that loading a MediaStream in a media element eventually results in \"canplay\" even when not playing or autoplaying"); promise_test(async t => { const wait = ms => new Promise(r => t.step_timeout(r, ms)); const timeout = (promise, time, msg) => Promise.race([ promise, wait(time).then(() => Promise.reject(new Error(msg))) ]); const unexpected = e => assert_unreached(`Got unexpected event ${e.type}`); const stream = await navigator.mediaDevices.getUserMedia({video: true}); t.add_cleanup(() => { vid.ondurationchange = null; stream.getTracks().forEach(track => track.stop()) }); vid.srcObject = stream; vid.onloadstart = unexpected; vid.ondurationchange = unexpected; vid.onresize = unexpected; vid.onloadedmetadata = unexpected; vid.onloadeddata = unexpected; vid.oncanplay = unexpected; vid.oncanplaythrough = unexpected; await timeout(new Promise(r => vid.onloadstart = r), 8000, "loadstart timeout"); vid.onloadstart = unexpected; await timeout(new Promise(r => vid.ondurationchange = r), 8000, "durationchange timeout"); vid.ondurationchange = unexpected; assert_equals(vid.duration, Infinity, "duration changes to Infinity"); await timeout(new Promise(r => vid.onresize = r), 8000, "resize timeout"); vid.onresize = unexpected; assert_not_equals(vid.videoWidth, 0, "videoWidth is something after \"resize\""); assert_not_equals(vid.videoHeight, 0, "videoHeight is something after \"resize\""); await timeout(new Promise(r => vid.onloadedmetadata = r), 8000, "loadedmetadata timeout"); vid.onloadedmetadata = unexpected; assert_greater_than_equal(vid.readyState, vid.HAVE_METADATA, "readyState is at least HAVE_METADATA after \"loadedmetadata\""); await timeout(new Promise(r => vid.onloadeddata = r), 8000, "loadeddata timeout"); vid.onloadeddata = unexpected; assert_equals(vid.readyState, vid.HAVE_ENOUGH_DATA, "readyState is HAVE_ENOUGH_DATA after \"loadeddata\" since there's no buffering"); await timeout(new Promise(r => vid.oncanplay = r), 8000, "canplay timeout"); vid.oncanplay = unexpected; assert_equals(vid.readyState, vid.HAVE_ENOUGH_DATA, "readyState is HAVE_ENOUGH_DATA after \"canplay\" since there's no buffering"); await timeout(new Promise(r => vid.oncanplaythrough = r), 8000, "canplaythrough timeout"); vid.oncanplaythrough = unexpected; assert_equals(vid.readyState, vid.HAVE_ENOUGH_DATA, "readyState is HAVE_ENOUGH_DATA after \"canplaythrough\""); // Crank the event loop to see whether any more events are fired. await wait(100); }, "Tests that loading a MediaStream in a media element sees all the expected (deterministic) events even when not playing or autoplaying"); </script> </body> </html>