LayoutTests/fast/mediastream/multi-microphone.html

<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script>
let track1, track2;

promise_test(async () => {
    const stream1 = await navigator.mediaDevices.getUserMedia({ audio: true });
    track1 = stream1.getAudioTracks()[0];
    assert_true(track1.getSettings().echoCancellation, "test1");

    const devices = await navigator.mediaDevices.enumerateDevices();
    const microphones = devices.filter(device => device.kind === "audioinput");

    assert_greater_than(devices.length, 1);

    const configurationChangePromise = new Promise(resolve => track1.onconfigurationchange = resolve);
    const stream2 = await navigator.mediaDevices.getUserMedia({ audio: { deviceId:microphones[microphones.length - 1].deviceId } });
    track2 = stream2.getAudioTracks()[0];
    assert_true(track2.getSettings().echoCancellation, "test2");

    if (window.internals && !internals.supportsMultiMicrophoneCaptureWithoutEchoCancellation()) {
        if (track1.readyState === "ended")
            return;
        return new Promise(resolve => track1.onended = resolve);
    }

    await configurationChangePromise;
    assert_false(track1.getSettings().echoCancellation, "test3");
}, "Capturing with different microphones should move previous capture out of echo cancellation");

promise_test(async (t) => {
    if (window.internals && !internals.supportsMultiMicrophoneCaptureWithoutEchoCancellation())
        return;

    const configurationChangePromise = new Promise(resolve => track2.onconfigurationchange = resolve);
    const applyPromise = track1.applyConstraints({ echoCancellation: true });
    await Promise.all([applyPromise, configurationChangePromise]);

    assert_true(track1.getSettings().echoCancellation, "test1");
    assert_false(track2.getSettings().echoCancellation, "test2");
}, "Enable echo cancellation with applyConstraints should disallow echo cancellation for other device tracks");

promise_test(async (t) => {
    if (window.internals && !internals.supportsMultiMicrophoneCaptureWithoutEchoCancellation())
        return;

    const configurationChangePromise = new Promise(resolve => track1.onconfigurationchange = resolve);
    const applyPromise = track2.applyConstraints({ echoCancellation: true });
    await Promise.all([applyPromise, configurationChangePromise]);

    assert_false(track1.getSettings().echoCancellation, "test1");
    assert_true(track2.getSettings().echoCancellation, "test2");
}, "Enable echo cancellation with applyConstraints should disallow echo cancellation for the other track again");

promise_test(async () => {
    track1.stop();
    track2.stop();
}, "Stopping tracks");
</script>