test_midi_packet_timing_sorting.html

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<html>

  <head>

    <title>WebMIDI Listener Test</title>

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

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

    <script type="application/javascript" src="MIDITestUtils.js"></script>

  </head>

  <body onload="runTests()">

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

     SimpleTest.waitForExplicitFinish();

     async function runTests() {

       await MIDITestUtils.permissionSetup(true);

       await SpecialPowers.pushPrefEnv({"set": [["privacy.resistFingerprinting.reduceTimerPrecision.jitter", false]]});

       var checkCount = 0;

       var lastTime = 0;

       var input;

       var output;

       function checkReturn(event) {

         ok(event.timeStamp > lastTime, "Received timestamp " + event.timeStamp + " should be greater than " + lastTime);

         lastTime = event.timeStamp;

         checkCount++;

         if (checkCount == 6) {

           input.close();

           output.close();

           SimpleTest.finish();

       ok("Testing MIDI packet reordering based on timestamps");

       // Request access without sysex.

       let access = await navigator.requestMIDIAccess({ "sysex": false });

       ok(true, "MIDI Access Request successful");

       is(access.sysexEnabled, false, "Sysex should be false");

       input = access.inputs.get(await MIDITestUtils.inputInfo.id);

       output = access.outputs.get(await MIDITestUtils.outputInfo.id);

       input.onmidimessage = checkReturn;

       // trigger the packet timing sorting tests

       output.send([0x90, 0x03, 0x00], 0);

       ok(true, "Waiting on packets");

    </script>

  </body>

</html>