зеркало из https://github.com/mozilla/gecko-dev.git
107 строки
3.6 KiB
HTML
107 строки
3.6 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<head>
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<title>Test loading of the same resource in multiple elements</title>
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<script src="/tests/SimpleTest/SimpleTest.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
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<script type="text/javascript" src="manifest.js"></script>
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</head>
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<body>
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<pre id="test">
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<script class="testbody" type="text/javascript">
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SimpleTest.requestCompleteLog();
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var manager = new MediaTestManager;
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function checkDuration(actual, expected, name) {
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ok(Math.abs(actual - expected) < 0.1,
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`${name} duration: ${actual} expected: ${expected}`);
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}
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function cloneLoaded(event) {
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var e = event.target;
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ok(true, `${e.token} loaded OK`);
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checkDuration(e.duration, e._expectedDuration, e.token);
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removeNodeAndSource(e);
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manager.finished(e.token);
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}
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function tryClone(e) {
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var clone = e.cloneNode(false);
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clone.token = `${e.token}(cloned)`;
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manager.started(clone.token);
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manager.finished(e.token);
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// Log events for debugging.
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var events = ["suspend", "play", "canplay", "canplaythrough", "loadstart", "loadedmetadata",
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"loadeddata", "playing", "ended", "error", "stalled", "emptied", "abort",
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"waiting", "pause"];
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function logEvent(evt) {
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var e = evt.target;
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info(`${e.token} got ${evt.type}`);
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}
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events.forEach(function(e) {
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clone.addEventListener(e, logEvent);
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});
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checkDuration(e.duration, e._expectedDuration, e.token);
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clone._expectedDuration = e._expectedDuration;
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clone.addEventListener("loadeddata", cloneLoaded, {once: true});
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clone.addEventListener("loadstart", function(evt) {
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info(`${evt.target.token} starts loading.`);
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// Since there is only one H264 decoder instance, we have to delete the
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// decoder of the original element for the cloned element to load. However,
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// we can't delete the decoder too early otherwise cloning decoder will
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// fail to kick in. We wait for 'loadstart' event of the cloned element to
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// know when the decoder is already cloned and we can delete the decoder of
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// the original element.
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removeNodeAndSource(e);
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}, {once: true});
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}
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// This test checks that loading the same URI twice in different elements at the same time
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// uses the same resource without doing another network fetch. One of the gCloneTests
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// uses dynamic_resource.sjs to return one resource on the first fetch and a different resource
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// on the second fetch. These resources have different lengths, so if the cloned element
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// does a network fetch it will get a resource with the wrong length and we get a test
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// failure.
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async function initTest(test, token) {
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var e = document.createElement("video");
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e.preload = "auto";
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e.src = test.name;
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e._expectedDuration = test.duration;
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ok(true, `Trying to load ${test.name}, duration=${test.duration}`);
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e.token = token;
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manager.started(token);
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// Since 320x240.ogv is less than 32KB, we need to wait for the
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// 'suspend' event to ensure the partial block is flushed to the cache
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// otherwise the cloned resource will create a new channel when it
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// has no data to read at position 0. The new channel will download
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// a different file than the original resource and fail the duration
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// test.
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let p1 = once(e, "loadeddata");
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let p2 = once(e, "suspend");
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await p1;
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await p2;
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tryClone(e);
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}
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SimpleTest.waitForExplicitFinish();
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SpecialPowers.pushPrefEnv(
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{"set": [
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["logging.MediaDecoder", "Debug"],
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["logging.nsMediaElement", "Debug"],
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["logging.MediaCache", "Debug"],
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]},
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manager.runTests.bind(manager, gCloneTests, initTest));
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</script>
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</pre>
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</body>
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</html>
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