File: GUM-empty-option-param.https.html

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<!doctype html>
<html>
<head>
<title>getUserMedia({}) rejects with TypeError</title>
<link rel="author" title="Dominique Hazael-Massieux" href="mailto:dom@w3.org"/>
<link rel="help" href="https://w3c.github.io/mediacapture-main/#dom-mediadevices-getusermedia">
</head>
<body>
<h1 class="instructions">Description</h1>
<p class="instructions">This test checks that getUserMedia with no value in the
options parameter raises a TypeError exception.</p>

<div id='log'></div>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script>
promise_test(async () => {
  try {
    // Race a settled promise to check that the returned promise is already
    // rejected.
    await Promise.race([navigator.mediaDevices.getUserMedia({}),
                       Promise.resolve()]);
  } catch (error) {
    assert_throws_js(TypeError, () => { throw error });
    assert_false('constraintName' in error,
                 "constraintName attribute not set as expected");
    return;
  }
  assert_unreached("should have returned an already-rejected promise.");
}, "Tests that getUserMedia is rejected with a TypeError when used with an empty options parameter");

</script>
</body>
</html>