test_streams_srcObject.html

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<!DOCTYPE HTML>

<html>

<head>

  <title>Test interactions of src and srcObject</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

  <script type="text/javascript" src="manifest.js"></script>

</head>

<body onload="doTests()">

<audio id="a1"></audio>

<audio id="a2"></audio>

<pre id="test">

<script class="testbody" type="text/javascript">

SimpleTest.waitForExplicitFinish();

var doTest = srcObject => new Promise(resolve => {

  var a = document.getElementById('a1');

  a.src = getPlayableAudio(gSmallTests).name;

  var b = new Audio();

  var newSrc = a.src + "?2";

  b.src = newSrc;

  is(b[srcObject], null, "Initial srcObject is null");

  var stream = a.mozCaptureStream();

  b[srcObject] = stream;

  is(b[srcObject], stream, "Stream set correctly");

  try {

    b[srcObject] = "invalid";

    ok(false, "Setting srcObject to an invalid value should throw.");

  } catch (e) {

    ok(e instanceof TypeError, "Exception should be a TypeError");

  is(b[srcObject], stream, "Stream not set to invalid value");

  is(b.src, newSrc, "src attribute not affected by setting srcObject");

  var step = 0;

  b.addEventListener("loadedmetadata", function() {

    if (step == 0) {

      is(b.currentSrc, "", "currentSrc set to empty string while playing srcObject");

      b[srcObject] = null;

      is(b[srcObject], null, "Stream set to null");

      // The resource selection algorithm will run again and choose b.src

    } else if (step == 1) {

      is(b.currentSrc, b.src, "currentSrc set to src now that srcObject is null");

      resolve();

    ++step;

});

  a.play();

  b.play();

});

var doTests = () => doTest("srcObject")

  .catch(e => ok(false, "Unexpected error: " + e))

  .then(() => SimpleTest.finish())

  .catch(e => ok(false, "Coding error: " + e));

</script>

</pre>

</body>

</html>