exponential-ramp-crash-1253746.html

<!DOCTYPE html>
<html>
<head>
  <title>
    Test if a corner case crashes the exponential ramp.
  </title>
  <script src="../../resources/testharness.js"></script>
  <script src="../../resources/testharnessreport.js"></script>
</head>
<body>
  <script>
    const t = async_test('exponential-ramp-crash');

    const onload = () => {
      const context = new OfflineAudioContext(2, 441000, 44100);
      const source = new ConstantSourceNode(context);
      const delay_node = context.createDelay(30);
      delay_node.connect(context.destination);
      // The time overlap between 4.1s and 4s caused a crash in M95:
      // https://crbug.com/1253746
      delay_node.delayTime.exponentialRampToValueAtTime(2, 4.1);
      delay_node.delayTime.cancelAndHoldAtTime(4);
      context.oncomplete = t.step_func_done(() => {
        // The |delay_node.delayTime| value should be zero because it does not
        // have the previous anchor value. Based on the specification, if the
        // beginning of an expoential ramp is zero, the resulting value falls
        // into zero. In this case, there was no value point before the
        // exponential ramp, and having no value point is treated as a
        // default value, which is zero for |delayTime|.
        assert_equals(delay_node.delayTime.value, 0);
        assert_equals(context.state, 'closed');
      });
      context.startRendering();
    };

    window.addEventListener('load', t.step_func(onload));
  </script>
</body>
</html>
chromium/third_party/blink/web_tests/webaudio/AudioParam/exponential-ramp-crash-1253746.html
