mozilla-central: testing/web-platform/tests/webaudio/the-audio-api/the-audiobuffersourcenode-interface/ctor-audiobuffersource.html@b48b65b15c8e8520f1eedcbd3aa29b2669fc3d20

<!DOCTYPE html>
<html>
  <head>
    <title>
      Test Constructor: AudioBufferSource
    </title>
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
    <script src="/webaudio/resources/audit-util.js"></script>
    <script src="/webaudio/resources/audit.js"></script>
    <script src="/webaudio/resources/audionodeoptions.js"></script>
  </head>
  <body>
    <script id="layout-test-code">
      let context;

      let audit = Audit.createTaskRunner();

      audit.define('initialize', (task, should) => {
        context = initializeContext(should);
        task.done();
      });

      audit.define('invalid constructor', (task, should) => {
        testInvalidConstructor(should, 'AudioBufferSourceNode', context);
        task.done();
      });

      audit.define('default constructor', (task, should) => {
        let prefix = 'node0';
        let node =
            testDefaultConstructor(should, 'AudioBufferSourceNode', context, {
              prefix: prefix,
              numberOfInputs: 0,
              numberOfOutputs: 1,
              channelCount: 2,
              channelCountMode: 'max',
              channelInterpretation: 'speakers'
            });

        testDefaultAttributes(should, node, prefix, [
          {name: 'buffer', value: null},
          {name: 'detune', value: 0},
          {name: 'loop', value: false},
          {name: 'loopEnd', value: 0.0},
          {name: 'loopStart', value: 0.0},
          {name: 'playbackRate', value: 1.0},
        ]);

        task.done();
      });

      audit.define('nullable buffer', (task, should) => {
        let node;
        let options = {buffer: null};

        should(
            () => {
              node = new AudioBufferSourceNode(context, options);
            },
            'node1 = new AudioBufferSourceNode(c, ' + JSON.stringify(options))
            .notThrow();

        should(node.buffer, 'node1.buffer').beEqualTo(null);

        task.done();
      });

      audit.define('constructor options', (task, should) => {
        let node;
        let buffer = context.createBuffer(2, 1000, context.sampleRate);

        let options = {
          buffer: buffer,
          detune: .5,
          loop: true,
          loopEnd: (buffer.length / 2) / context.sampleRate,
          loopStart: 5 / context.sampleRate,
          playbackRate: .75
        };

        let message = 'node = new AudioBufferSourceNode(c, ' +
            JSON.stringify(options) + ')';

        should(() => {
          node = new AudioBufferSourceNode(context, options);
        }, message).notThrow();

        // Use the factory method to create an equivalent node and compare the
        // results from the constructor against this node.
        let factoryNode = context.createBufferSource();
        factoryNode.buffer = options.buffer;
        factoryNode.detune.value = options.detune;
        factoryNode.loop = options.loop;
        factoryNode.loopEnd = options.loopEnd;
        factoryNode.loopStart = options.loopStart;
        factoryNode.playbackRate.value = options.playbackRate;

        should(node.buffer === buffer, 'node2.buffer === buffer')
            .beEqualTo(true);
        should(node.detune.value, 'node2.detune.value')
            .beEqualTo(factoryNode.detune.value);
        should(node.loop, 'node2.loop').beEqualTo(factoryNode.loop);
        should(node.loopEnd, 'node2.loopEnd').beEqualTo(factoryNode.loopEnd);
        should(node.loopStart, 'node2.loopStart')
            .beEqualTo(factoryNode.loopStart);
        should(node.playbackRate.value, 'node2.playbackRate.value')
            .beEqualTo(factoryNode.playbackRate.value);

        task.done();
      });

      audit.run();
    </script>
  </body>
</html>
author	Tim Huang <tihuang@mozilla.com>
	Wed, 16 Jul 2025 17:26:02 +0000 (6 hours ago)
changeset 796860	b48b65b15c8e8520f1eedcbd3aa29b2669fc3d20
parent 416598	ff155e599e248b7e4834e7a2ff2d6f29423baca9
permissions	-rw-r--r--