query-chainer.test.js
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'use strict';
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();
});
});
});
});