query-chainer.test.js
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var chai = require('chai')
, expect = chai.expect
, Support = require(__dirname + '/support')
, QueryChainer = require("../lib/query-chainer")
, CustomEventEmitter = require("../lib/emitters/custom-event-emitter")
chai.config.includeStack = true
describe(Support.getTestDialectTeaser("QueryChainer"), function () {
beforeEach(function(done) {
this.queryChainer = new QueryChainer()
done()
})
describe('add', function() {
it('adds a new serial item if method is passed', function(done) {
expect(this.queryChainer.serials.length).to.equal(0)
this.queryChainer.add({}, 'foo')
expect(this.queryChainer.serials.length).to.equal(1)
done()
})
it('adds a new emitter if no method is passed', function(done) {
expect(this.queryChainer.emitters.length).to.equal(0)
this.queryChainer.add(new CustomEventEmitter())
expect(this.queryChainer.emitters.length).to.equal(1)
done()
})
})
describe('run', function() {
it('finishes when all emitters are finished', function(done) {
var emitter1 = new CustomEventEmitter(function(e) { e.emit('success') })
var emitter2 = new CustomEventEmitter(function(e) { e.emit('success') })
this.queryChainer.add(emitter1)
this.queryChainer.add(emitter2)
this.queryChainer.run().success(function() {
expect(true).to.be.true
done()
}).error(function(err) {
console.log(err)
})
emitter1.run()
setTimeout(function() { emitter2.run() }, 100)
})
it("returns the result of the passed emitters", function(done) {
var emitter1 = new CustomEventEmitter(function(e) { e.emit('success', 1) })
this.queryChainer.add(emitter1)
this.queryChainer.run().success(function(results) {
expect(results).to.exist
expect(results).to.have.length(1)
expect(results[0]).to.equal(1)
done()
})
emitter1.run()
})
it("returns the result of the passed emitters in the order of the occurrence of adding the emitters", function(done) {
var emitter1 = new CustomEventEmitter(function(e) { e.emit('success', 1) })
, emitter2 = new CustomEventEmitter(function(e) { e.emit('success', 2) })
, emitter3 = new CustomEventEmitter(function(e) { e.emit('success', 3) })
this.queryChainer.add(emitter1)
this.queryChainer.add(emitter2)
this.queryChainer.add(emitter3)
this.queryChainer.run().success(function(results) {
expect(results).to.have.length(3)
expect(results).to.include.members([1,2,3])
done()
})
emitter2.run()
emitter1.run()
emitter3.run()
})
it("returns the result as an array and each result as part of the callback signature", function(done) {
var emitter1 = new CustomEventEmitter(function(e) { e.emit('success', 1) })
, emitter2 = new CustomEventEmitter(function(e) { e.emit('success', 2) })
this.queryChainer.add(emitter1)
this.queryChainer.add(emitter2)
this.queryChainer.run().success(function(results, result1, result2) {
expect(result1).to.exist
expect(result2).to.exist
expect(result1).to.equal(1)
expect(result2).to.equal(2)
done()
})
emitter2.run()
emitter1.run()
})
})
describe('runSerially', function() {
it('finishes when all emitters are finished', function(done) {
var emitter1 = new CustomEventEmitter(function(e) { e.emit('success') })
var emitter2 = new CustomEventEmitter(function(e) { e.emit('success') })
this.queryChainer.add(emitter1, 'run')
this.queryChainer.add(emitter2, 'run')
this.queryChainer.runSerially().success(function() {
expect(true).to.be.true
done()
})
})
it("returns the result of the passed emitters", function(done) {
var emitter1 = new CustomEventEmitter(function(e) { e.emit('success', 1) })
this.queryChainer.add(emitter1, 'run')
this.queryChainer.runSerially().success(function(results) {
expect(results).to.exist
expect(results).to.have.length(1)
expect(results[0]).to.equal(1)
done()
})
})
it("returns the result of the passed emitters in the order of the occurrence of adding the emitters", function(done) {
var emitter1 = new CustomEventEmitter(function(e) { e.emit('success', 1) })
, emitter2 = new CustomEventEmitter(function(e) { setTimeout(function() { e.emit('success', 2) }, 100) })
, emitter3 = new CustomEventEmitter(function(e) { e.emit('success', 3) })
this.queryChainer.add(emitter1, 'run')
this.queryChainer.add(emitter2, 'run')
this.queryChainer.add(emitter3, 'run')
this.queryChainer.runSerially().success(function(results) {
expect(results).to.have.length(3)
expect(results).to.contain.members([1,2,3])
done()
})
})
it("returns the result as an array and each result as part of the callback signature", function(done) {
var emitter1 = new CustomEventEmitter(function(e) { e.emit('success', 1) })
, emitter2 = new CustomEventEmitter(function(e) { e.emit('success', 2) })
this.queryChainer.add(emitter1, 'run')
this.queryChainer.add(emitter2, 'run')
this.queryChainer.runSerially().success(function(results, result1, result2) {
expect(result1).to.exist
expect(result2).to.exist
expect(result1).to.equal(1)
expect(result2).to.equal(2)
done()
})
})
})
})