<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>Testing change of device while capturing.</title>
    <script src="../../resources/testharness.js"></script>
    <script src="../../resources/testharnessreport.js"></script>
</head>
<body>
    <video id="video"></video>
    <script>
    let setup = async (test) => {
        if (!window.testRunner)
            return Promise.reject("test requires internal API");

        test.add_cleanup(() => { testRunner.resetMockMediaDevices(); });
    }

    promise_test(async (test) => {
        await setup(test);

        testRunner.addMockMicrophoneDevice("usbmic", "my USB microphone");
        video.srcObject = await navigator.mediaDevices.getUserMedia({ audio: { deviceId: "usbmic" } });
        await video.play();

        testRunner.removeMockMediaDevice("usbmic");
        return new Promise((resolve, reject) => {
            video.srcObject.getAudioTracks()[0].onended = resolve();
            setTimeout(reject, 2000);
        });
    }, "Detection of missing capturing device should trigger capture to fail");

    promise_test(async (test) => {
        await setup(test);

        testRunner.addMockMicrophoneDevice("usbmic1", "my USB microphone");
        testRunner.addMockMicrophoneDevice("usbmic2", "my second USB microphone");
        video.srcObject = await navigator.mediaDevices.getUserMedia({ audio: { deviceId: "usbmic1" } });
        await video.play();
        testRunner.removeMockMediaDevice("usbmic2");
        testRunner.addMockMicrophoneDevice("usbmic3", "my third USB microphone");
        await new Promise(resolve => setTimeout(resolve, 200));
        assert_equals(video.srcObject.getAudioTracks()[0].readyState, "live");
    }, "Adding or removing a new device should not fail ongoing capture");
    </script>
</body>
</html>