test.js

/* eslint handle-callback-err:0, no-magic-numbers:0, no-unused-vars:0 */
'use strict'

// Import
const events = require('events')
const equal = require('assert-helpers').equal
const joe = require('joe')
const domain = require('./')

// =====================================
// Tests

joe.describe('domain-browser', function (describe, it) {
	it('should work on throws', function (done) {
		const d = domain.create()
		d.on('error', function (err) {
			equal(err && err.message, 'a thrown error', 'error message')
			done()
		})
		d.run(function () {
			throw new Error('a thrown error')
		})
	})

	it('should be able to add emitters', function (done) {
		const d = domain.create()
		const emitter = new events.EventEmitter()

		d.add(emitter)
		d.on('error', function (err) {
			equal(err && err.message, 'an emitted error', 'error message')
			done()
		})

		emitter.emit('error', new Error('an emitted error'))
	})

	it('should be able to remove emitters', function (done) {
		const emitter = new events.EventEmitter()
		const d = domain.create()
		let domainGotError = false

		d.add(emitter)
		d.on('error', function (err) {
			domainGotError = true
		})

		emitter.on('error', function (err) {
			equal(err && err.message, 'This error should not go to the domain', 'error message')

			// Make sure nothing race condition-y is happening
			setTimeout(function () {
				equal(domainGotError, false, 'no domain error')
				done()
			}, 0)
		})

		d.remove(emitter)
		emitter.emit('error', new Error('This error should not go to the domain'))
	})

	it('bind should work', function (done) {
		const d = domain.create()
		d.on('error', function (err) {
			equal(err && err.message, 'a thrown error', 'error message')
			done()
		})
		d.bind(function (err, a, b) {
			equal(err && err.message, 'a passed error', 'error message')
			equal(a, 2, 'value of a')
			equal(b, 3, 'value of b')
			throw new Error('a thrown error')
		})(new Error('a passed error'), 2, 3)
	})

	it('intercept should work', function (done) {
		const d = domain.create()
		let count = 0
		d.on('error', function (err) {
			if ( count === 0 ) {
				equal(err && err.message, 'a thrown error', 'error message')
			}
			else if ( count === 1 ) {
				equal(err && err.message, 'a passed error', 'error message')
				done()
			}
			count++
		})

		d.intercept(function (a, b) {
			equal(a, 2, 'value of a')
			equal(b, 3, 'value of b')
			throw new Error('a thrown error')
		})(null, 2, 3)

		d.intercept(function (a, b) {
			throw new Error('should never reach here')
		})(new Error('a passed error'), 2, 3)
	})
})