dom/midi/tests/test_midi_device_connect_disconnect.html

   1 <html>
   2   <head>
   3     <title>WebMIDI Listener Test</title>
   4     <script src="/tests/SimpleTest/SimpleTest.js"></script>
   5     <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
   6     <script type="application/javascript" src="MIDITestUtils.js"></script>
   7   </head>
   8
   9   <body onload="runTests()">
  10     <script class="testbody" type="application/javascript">
  11      SimpleTest.waitForExplicitFinish();
  12
  13      async function runTests() {
  14        await MIDITestUtils.permissionSetup(true);
  15        let output;
  16
  17        let midi_access;
  18        try {
  19          midi_access = await navigator.requestMIDIAccess({ "sysex": false });
  20          ok(true, "MIDI Access Request successful");
  21        } catch (e) {
  22          ok(false, "MIDI Access Request failed!");
  23          SimpleTest.finish();
  24          return;
  25        }
  26        is(midi_access.sysexEnabled, false, "Sysex should be false");
  27        output = midi_access.outputs.get(await MIDITestUtils.outputInfo.id);
  28        let statePromiseRes;
  29        let statePromise = new Promise((res) => { statePromiseRes = res; });
  30        await output.open();
  31        let stateChangeHandler = (event) => {
  32          if (event.port == output) {
  33            return;
  34          }
  35          statePromiseRes(event.port);
  36        };
  37        midi_access.addEventListener("statechange", stateChangeHandler);
  38        // Send command to connect new port.
  39        output.send([0x90, 0x01, 0x00]);
  40        let p = await statePromise;
  41        is(p.state, "connected", "Device " + p.name + " connected");
  42
  43        // Rebuild our promise, we'll need to await another one.
  44        statePromise = new Promise((res) => { statePromiseRes = res; });
  45        output.send([0x90, 0x02, 0x00]);
  46        p = await statePromise;
  47        is(p.state, "disconnected", "Device " + p.name + " disconnected");
  48        midi_access.removeEventListener("statechange", stateChangeHandler);
  49        SimpleTest.finish();
  50      }
  51     </script>
  52   </body>
  53 </html>