constant-source-basic.html

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This WPT test may be referenced by the following Test IDs:
- /webaudio/the-audio-api/the-constantsourcenode-interface/constant-source-basic.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

  <head>

    <title>

      Basic ConstantSourceNode Tests

    </title>

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

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

    <script src="../../resources/audit-util.js"></script>

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

    <script src="../../resources/start-stop-exceptions.js"></script>

  </head>

  <body>

    <script id="layout-test-code">

      let context = new AudioContext();

      let audit = Audit.createTaskRunner();

      audit.define('createConstantSource()', (task, should) => {

        let node;

        let prefix = 'Factory method: ';

        should(() => {

          node = context.createConstantSource();

        }, prefix + 'node = context.createConstantSource()').notThrow();

        should(

            node instanceof ConstantSourceNode,

            prefix + 'node instance of ConstantSourceNode')

            .beEqualTo(true);

        verifyNodeDefaults(should, node, prefix);

        task.done();

});

      audit.define('new ConstantSourceNode()', (task, should) => {

        let node;

        let prefix = 'Constructor: ';

        should(() => {

          node = new ConstantSourceNode(context);

        }, prefix + 'node = new ConstantSourceNode()').notThrow();

        should(

            node instanceof ConstantSourceNode,

            prefix + 'node instance of ConstantSourceNode')

            .beEqualTo(true);

        verifyNodeDefaults(should, node, prefix);

        task.done();

});

      audit.define('start/stop exceptions', (task, should) => {

        let node = new ConstantSourceNode(context);

        testStartStop(should, node);

        task.done();

});

      function verifyNodeDefaults(should, node, prefix) {

        should(node.numberOfInputs, prefix + 'node.numberOfInputs')

            .beEqualTo(0);

        should(node.numberOfOutputs, prefix + 'node.numberOfOutputs')

            .beEqualTo(1);

        should(node.channelCount, prefix + 'node.channelCount').beEqualTo(2);

        should(node.channelCountMode, prefix + 'node.channelCountMode')

            .beEqualTo('max');

        should(

            node.channelInterpretation, prefix + 'node.channelInterpretation')

            .beEqualTo('speakers');

        should(node.offset.value, prefix + 'node.offset.value').beEqualTo(1);

        should(node.offset.defaultValue, prefix + 'node.offset.defaultValue')

            .beEqualTo(1);

        should(node.offset.minValue, prefix + 'node.offset.minValue')

            .beEqualTo(Math.fround(-3.4028235e38));

        should(node.offset.maxValue, prefix + 'node.offset.maxValue')

            .beEqualTo(Math.fround(3.4028235e38));

      audit.run();

    </script>

  </body>

</html>