oggmented/test/test.js

Drop-in replacement for AudioContext. Overrides decodeAudioData and provides Ogg Vorbis decoding, calling super.decodeAudioData for non-vorbis.

import oac from '../dist/oggmented-bundle'
import chai from 'chai'
import Bowser from "bowser"
const expect = chai.expect;

const engines = {
    'gecko': ['Firefox'],           // Correctly decodes ogg/vorbis
    'blink': ['Chrome', 'Opera'],   // Mostly correctly decodes ogg/vorbis
    'webkit': ['Safari']            // Does not decode ogg/vorbis
}

const audioCtx = new oac()
describe('Using oggmented audio context', function () {
    it('should correctly guess browser engine based on ogg decoding capabilities', async function () {
        const browser = Bowser.getParser(window.navigator.userAgent);
        const level = await audioCtx.nativeVorbisLevel()
        expect(engines[level]).to.include(browser.getBrowserName())
    })

    describe('Decoding silence.wav', function () {
        let response, fileBuffer, buffer

        before(async () => {
            response = await fetch('base/test/silence.wav')
            fileBuffer = await response.arrayBuffer()
        })

        beforeEach(function () {
            buffer = fileBuffer.slice()
        })

        it('should resolve correct audioBuffer', async function () {
            let audioBuffer
            audioBuffer = await audioCtx.decodeAudioData(buffer)
            expect(audioBuffer.length).equal(1)
            expect(audioBuffer.getChannelData(0)[0]).equal(0)
        })

        it('should send correct audioBuffer to callback', async function () {
            const audioBuffer = await new Promise(resolve => audioCtx.decodeAudioData(buffer, resolve))
            expect(audioBuffer.length).equal(1)
            expect(audioBuffer.getChannelData(0)[0]).equal(0)
        })
    })

    describe('Decoding silence.ogg', function () {
        let response, fileBuffer, buffer

        before(async function () {
            response = await fetch('base/test/silence.ogg')
            fileBuffer = await response.arrayBuffer()
        })

        beforeEach(function () {
            buffer = fileBuffer.slice()
        })

        it('should resolve correct audioBuffer', async function () {
            const audioBuffer = await audioCtx.decodeAudioData(buffer)
            expect(audioBuffer.length).equal(1)
            expect(audioBuffer.getChannelData(0)[0]).equal(0)
        })

        it('should send correct audioBuffer to callback', async function () {
            const audioBuffer = await new Promise(resolve => audioCtx.decodeAudioData(buffer, resolve))
            expect(audioBuffer.length).equal(1)
            expect(audioBuffer.getChannelData(0)[0]).equal(0)
        })
    })
})

// tangent from: making sure decodeAudioData is implemented in safari styleMedia
// use await inside pre.js code ... can i already do this i.e. would emscripten compile to something a browser can support?  probs make sure babel takes care of that
// having tests make sure both work
// maybe pull pre.js out so it gets compiled with babel