audiocontext-suspended-onerror.html

<!doctype html>
<html>
<head>
  <title>Test AudioContext.onerror on a suspended AudioContext</title>
  <script src="../../resources/testharness.js"></script>
  <script src="../../resources/testharnessreport.js"></script>
</head>
<body>
  <script>
    promise_test(async () => {
      const context = new AudioContext();
      await context.suspend();
      assert_equals(context.state, 'suspended',
                    'The initial context state should be "suspended".');

      let isOnErrorDispatched = false;

      return new Promise(async (resolve) => {
        context.onerror = () => {
          isOnErrorDispatched = true;
          resolve();
          context.close();
        };

        context.onstatechange = () => {
          // Do not care about what happens before the error event.
          if (!isOnErrorDispatched) {
            return;
          }

          // The only state change expected the `closed` state.
          assert_equals(context.state, 'closed');
        };

        // Trigger a fake device error.
        internals.emulateDeviceFailureOnAudioContext(context);
      });
    }, 'Test AudioContext.onerror on a suspended AudioContext');
  </script>
</body>
</html>
chromium/third_party/blink/web_tests/webaudio/internals/audiocontext-suspended-onerror.html
