mediacapture-streams/GUM-echoCancellation-all.https.html

<!doctype html>
<title>getUserMedia echoCancellation remote-only</title>
<p class="instructions">When prompted, accept to share your audio stream.</p>
<meta name=timeout content=long>
<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'

  // https://w3c.github.io/mediacapture-main/#dom-echocancellationmodeenum-all

  promise_test(async t => {
    await setMediaPermission("granted", ["microphone"]);
    const stream = await navigator.mediaDevices.getUserMedia({
      video: false,
      audio: {echoCancellation: {exact: "all"}},
    });
    const track = stream.getAudioTracks()[0];
    t.add_cleanup(() => track.stop());
    const settings = track.getSettings();
    assert_equals(settings.echoCancellation, "all");
  }, 'getUserMedia suports "all"');

</script>