linx-simulator2/node_modules/speaker/test/test.js

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2019-09-18 08:11:16 +00:00
/* eslint-env mocha */
'use strict'
/**
* Module dependencies.
*/
const os = require('os')
const assert = require('assert')
const bufferAlloc = require('buffer-alloc')
const Speaker = require('../')
const endianness = os.endianness()
const opposite = endianness === 'LE' ? 'BE' : 'LE'
describe('exports', function () {
it('should export a Function', function () {
assert.equal('function', typeof Speaker)
})
it('should have an "api_version" property', function () {
assert(Speaker.hasOwnProperty('api_version'))
assert('number', typeof Speaker.api_version)
})
it('should have a "description" property', function () {
assert(Speaker.hasOwnProperty('description'))
assert('string', typeof Speaker.description)
})
it('should have a "module_name" property', function () {
assert(Speaker.hasOwnProperty('module_name'))
assert('string', typeof Speaker.module_name)
})
})
describe('Speaker', function () {
it('should return a Speaker instance', function () {
const s = new Speaker()
assert(s instanceof Speaker)
})
it('should be a writable stream', function () {
const s = new Speaker()
assert.equal(s.writable, true)
assert.notEqual(s.readable, true)
})
it('should emit an "open" event after the first write()', function (done) {
const s = new Speaker()
let called = false
s.on('open', function () {
called = true
done()
})
assert.equal(called, false)
s.write(bufferAlloc(0))
})
it('should emit a "flush" event after end()', function (done) {
const s = new Speaker()
let called = false
s.on('flush', function () {
called = true
done()
})
assert.equal(called, false)
s.end(bufferAlloc(0))
})
it('should emit a "close" event after end()', function (done) {
this.slow(1000)
const s = new Speaker()
let called = false
s.on('close', function () {
called = true
done()
})
assert.equal(called, false)
s.end(bufferAlloc(0))
})
it('should only emit one "close" event', function (done) {
const s = new Speaker()
let count = 0
s.on('close', function () {
count++
})
assert.equal(0, count)
s.close()
assert.equal(1, count)
s.close()
assert.equal(1, count)
done()
})
it('should accept a device option', function (done) {
const s = new Speaker({ device: 'test' })
assert.equal(s.device, 'test')
s.on('close', done)
s.end(bufferAlloc(0))
})
it('should not throw an Error if native "endianness" is specified', function () {
assert.doesNotThrow(function () {
// eslint-disable-next-line no-new
new Speaker({ endianness: endianness })
})
})
it('should throw an Error if non-native "endianness" is specified', function () {
assert.throws(function () {
// eslint-disable-next-line no-new
new Speaker({ endianness: opposite })
})
})
it('should throw an Error if a non-supported "format" is specified', function (done) {
const speaker = new Speaker({
bitDepth: 31,
signed: true
})
speaker.once('error', (err) => {
assert.equal('invalid PCM format specified', err.message)
done()
})
speaker.write('a')
})
})