audioworklet-registerprocessor-constructor.https.window.js

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This WPT test may be referenced by the following Test IDs:
- /webaudio/the-audio-api/the-audioworklet-interface/audioworklet-registerprocessor-constructor.https.window.html - WPT Dashboard Interop Dashboard

'use strict';

// https://crbug.com/1078902: this test verifies two TypeError cases from

// registerProcessor() method:

// - When a given parameter is not a Function.

// - When a given parameter is not a constructor.

const TestDescriptions = [

  'The parameter should be of type "Function".',

  'The class definition of AudioWorkletProcessor should be a constructor.'

];

// See `register-processor-exception.js` file for the test details.

promise_test(async () => {

  const context = new AudioContext();

  await context.audioWorklet.addModule(

      './processors/register-processor-typeerrors.js');

  const messenger = new AudioWorkletNode(context, 'messenger-processor');

  return new Promise(resolve => {

    let testIndex = 0;

    messenger.port.onmessage = (event) => {

      const exception = event.data;

      assert_equals(exception.name, 'TypeError',

                    TestDescriptions[testIndex]);

      if (++testIndex === TestDescriptions.length) {

        resolve();

};

    // Start the test on AudioWorkletGlobalScope.

    messenger.port.postMessage({});

});

}, 'Verifies two TypeError cases from registerProcessor() method.');