balena-supervisor/test/08-blink.spec.coffee

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Promise = require 'bluebird'
constants = require '../src/lib/constants'
fs = Promise.promisifyAll(require('fs'))
blink = require('../src/lib/blink')
{ expect } = require './lib/chai-config'
describe 'blink', ->
it 'is a blink function', ->
expect(blink).to.be.a('function')
it 'has a pattern property with start and stop functions', ->
expect(blink.pattern.start).to.be.a('function')
expect(blink.pattern.stop).to.be.a('function')
it 'writes to a file that represents the LED, and writes a 0 at the end to turn the LED off', ->
blink(1)
.then ->
fs.readFileAsync(constants.ledFile)
.then (contents) ->
expect(contents.toString()).to.equal('0')