audioworklet-denormals.https.window.js

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /webaudio/the-audio-api/the-audioworklet-interface/audioworklet-denormals.https.window.html - WPT Dashboard Interop Dashboard

'use strict';

// Test if the JS code execution in AudioWorkletGlobalScope can handle the

// denormals properly. For more details, see:

// https://esdiscuss.org/topic/float-denormal-issue-in-javascript-processor-node-in-web-audio-api

promise_test(async () => {

  // In the main thread, the denormals should be non-zeros.

  assert_not_equals(Number.MIN_VALUE, 0.0,

                    'The denormals should be non-zeros.');

  const context = new AudioContext();

  await context.audioWorklet.addModule(

      './processors/denormal-test-processor.js');

  const denormalTestProcessor = new AudioWorkletNode(context, 'denormal-test');

  return new Promise(resolve => {

    denormalTestProcessor.port.onmessage = resolve;

    denormalTestProcessor.connect(context.destination);

  }).then(event => {

    // In the AudioWorkletGlobalScope, the denormals should be non-zeros too.

    assert_true(

        event.data.result,

        'The denormals should be non-zeros in AudioWorkletGlobalScope.');

});

}, 'Test denormal behavior in AudioWorkletGlobalScope');