cycle-without-delay.html

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This WPT test may be referenced by the following Test IDs:
- /webaudio/the-audio-api/processing-model/cycle-without-delay.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html class="a">

  <head>

    <title>Cycles without DelayNode in audio node graph</title>

    <script src="/resources/testharness.js"></script>

    <script src="/resources/testharnessreport.js"></script>

  </head>

  <body>

    <script>

      function doTest() {

        var off = new OfflineAudioContext(1, 512, 48000);

        var osc = new OscillatorNode(off);

        var fb = new GainNode(off);

        // zero delay feedback loop

        osc.connect(fb).connect(fb).connect(off.destination);

        osc.start(0);

        return off.startRendering().then((b) => {

          return Promise.resolve(b.getChannelData(0));

});

      promise_test(() => {

        return doTest().then(samples => {

          var silent = true;

          for (var i = 0; i < samples.length; i++) {

            if (samples[i] != 0.0) {

              silent = false;

              break;

          assert_true(silent);

});

      }, 'Test that cycles that don\'t contain a DelayNode are muted');

    </script>

  </body>

</html>