loopback-with-timestamp.https.html | Explore in Territory

<!doctype html>
<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>
<p>Regression test to check if non-zero timestamp works well.</p>
<script type="module">
import {MockMIDIService} from './resources/mock-midiservice.js';

const mock = new MockMIDIService();
promise_test(async () => {
  await test_driver.set_permission({name: 'midi', sysex: true}, 'granted');
  let access = await navigator.requestMIDIAccess({sysex: true});
  let input = access.inputs.values().next().value;
  let output = access.outputs.values().next().value;

  let expected_time = performance.now() + 1000;
  let data = [0x80, 0x00, 0x00];
  output.send(data, expected_time);

  let event = await new Promise(resolve => {
    input.addEventListener('midimessage', resolve);
  });

  assert_array_equals(data, event.data);
  assert_greater_than_equal(performance.now(), expected_time);
}, 'Test MIDIOutput.send() with non-zero timestamp.');
</script>

chromium/third_party/blink/web_tests/wpt_internal/webmidi/loopback-with-timestamp.https.html