ctor-gain.html - mozsearch

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This WPT test may be referenced by the following Test IDs:
- /webaudio/the-audio-api/the-gainnode-interface/ctor-gain.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

  <head>

    <title>

      Test Constructor: Gain

    </title>

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

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

    <script src="/webaudio/resources/audionodeoptions.js"></script>

  </head>

  <body>

    <script>

      const context = new AudioContext();

      test(() => {

        testInvalidConstructor_W3CTH('GainNode', context);

      }, 'GainNode: invalid constructor');

      test(() => {

        const prefix = 'node0';

        const node = testDefaultConstructor_W3CTH('GainNode', context, {

          prefix,

          numberOfInputs: 1,

          numberOfOutputs: 1,

          channelCount: 2,

          channelCountMode: 'max',

          channelInterpretation: 'speakers'

});

        testDefaultAttributes_W3CTH(

            node,

            prefix,

            [{ name: 'gain', value: 1 }]);

      }, 'GainNode: default constructor and default attributes');

      test(() => {

        testAudioNodeOptions_W3CTH(context, 'GainNode');

      }, 'GainNode: AudioNodeOptions are applied');

      test(() => {

        const options = { gain: -2 };

        const node = new GainNode(context, options);

        assert_true(node instanceof GainNode, 'instanceof GainNode');

        assert_equals(node.gain.value, options.gain, 'node.gain.value');

        assert_equals(node.channelCount, 2, 'node.channelCount');

        assert_equals(node.channelCountMode, 'max', 'node.channelCountMode');

        assert_equals(

            node.channelInterpretation,

            'speakers',

            'node.channelInterpretation');

      }, 'GainNode: constructor with options');

    </script>

  </body>

</html>