328 lines
8.4 KiB
JavaScript
328 lines
8.4 KiB
JavaScript
/* istanbul ignore next */
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describe('Ultron', function () {
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'use strict';
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var EventEmitter = require('eventemitter3')
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, EE = require('events').EventEmitter
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, assume = require('assume')
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, Ultron = require('./')
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, ultron
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, ee;
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beforeEach(function () {
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ee = new EventEmitter();
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ultron = new Ultron(ee);
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});
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afterEach(function () {
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ultron.destroy();
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ee.removeAllListeners();
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});
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it('is exposed as a function', function () {
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assume(Ultron).is.a('function');
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});
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it('can be initialized without the new keyword', function () {
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assume(Ultron(ee)).is.instanceOf(Ultron);
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});
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it('assigns a unique id to every instance', function () {
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for (var i = 0; i < 100; i++) {
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assume(ultron.id).does.not.equal((new Ultron()).id);
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}
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});
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it('allows removal through the event emitter', function () {
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function foo() {}
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function bar() {}
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ultron.on('foo', foo);
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ultron.once('foo', bar);
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assume(foo.__ultron).equals(ultron.id);
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assume(bar.__ultron).equals(ultron.id);
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assume(ee.listeners('foo').length).equals(2);
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ee.removeListener('foo', foo);
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assume(ee.listeners('foo').length).equals(1);
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ee.removeListener('foo', bar);
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assume(ee.listeners('foo').length).equals(0);
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});
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describe('#on', function () {
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it('assigns a listener', function () {
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assume(ee.listeners('foo').length).equals(0);
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function foo() {}
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ultron.on('foo', foo);
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assume(ee.listeners('foo').length).equals(1);
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assume(ee.listeners('foo')[0]).equals(foo);
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});
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it('tags the assigned function', function () {
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assume(ee.listeners('foo').length).equals(0);
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ultron.on('foo', function () {});
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assume(ee.listeners('foo')[0].__ultron).equals(ultron.id);
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});
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it('also passes in the context', function (next) {
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var context = 1313;
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ultron.on('foo', function (a, b, c) {
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assume(a).equals('a');
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assume(b).equals('b');
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assume(c).equals('c');
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assume(this).equals(context);
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next();
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}, context);
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ee.emit('foo', 'a', 'b', 'c');
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});
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it('works with regular eventemitters as well', function (next) {
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var ee = new EE()
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, ultron = new Ultron(ee);
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ultron.on('foo', function (a, b, c) {
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assume(a).equals('a');
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assume(b).equals('b');
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assume(c).equals('c');
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next();
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});
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ee.emit('foo', 'a', 'b', 'c');
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});
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});
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describe('#once', function () {
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it('assigns a listener', function () {
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assume(ee.listeners('foo').length).equals(0);
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function foo() {}
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ultron.once('foo', foo);
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assume(ee.listeners('foo').length).equals(1);
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assume(ee.listeners('foo')[0]).equals(foo);
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});
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it('tags the assigned function', function () {
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assume(ee.listeners('foo').length).equals(0);
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ultron.once('foo', function () {});
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assume(ee.listeners('foo')[0].__ultron).equals(ultron.id);
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});
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it('also passes in the context', function (next) {
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var context = 1313;
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ultron.once('foo', function (a, b, c) {
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assume(a).equals('a');
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assume(b).equals('b');
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assume(c).equals('c');
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assume(this).equals(context);
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next();
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}, context);
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ee.emit('foo', 'a', 'b', 'c');
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ee.emit('foo', 'a', 'b', 'c'); // Ensure that we don't double execute
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});
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it('works with regular eventemitters as well', function (next) {
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var ee = new EE()
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, ultron = new Ultron(ee);
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ultron.once('foo', function (a, b, c) {
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assume(a).equals('a');
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assume(b).equals('b');
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assume(c).equals('c');
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next();
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});
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ee.emit('foo', 'a', 'b', 'c');
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ee.emit('foo', 'a', 'b', 'c'); // Ensure that we don't double execute
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});
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});
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describe('#remove', function () {
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it('removes only our assigned `on` listeners', function () {
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function foo() {}
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function bar() {}
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ee.on('foo', foo);
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ultron.on('foo', bar);
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assume(ee.listeners('foo').length).equals(2);
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ultron.remove('foo');
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assume(ee.listeners('foo').length).equals(1);
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assume(ee.listeners('foo')[0]).equals(foo);
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});
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it('removes our private __ultron references', function () {
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function once() {}
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function on() {}
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assume('__ultron' in once).is.false();
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assume('__ultron' in on).is.false();
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ultron.on('foo', on);
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ultron.once('bar', once);
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assume('__ultron' in once).is.true();
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assume('__ultron' in on).is.true();
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ultron.remove('foo, bar');
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assume('__ultron' in once).is.false();
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assume('__ultron' in on).is.false();
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ultron.destroy();
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ee = new EE();
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ultron = new Ultron(ee);
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assume('__ultron' in once).is.false();
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assume('__ultron' in on).is.false();
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ultron.on('foo', on);
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ultron.once('bar', once);
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assume('__ultron' in once).is.true();
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assume('__ultron' in on).is.true();
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ultron.remove('foo, bar');
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assume('__ultron' in once).is.false();
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assume('__ultron' in on).is.false();
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});
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it('removes only our assigned `once` listeners', function () {
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function foo() {}
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function bar() {}
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ee.once('foo', foo);
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ultron.once('foo', bar);
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assume(ee.listeners('foo').length).equals(2);
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ultron.remove('foo');
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assume(ee.listeners('foo').length).equals(1);
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assume(ee.listeners('foo')[0]).equals(foo);
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});
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it('removes only our assigned `once` listeners from regular EE', function () {
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var ee = new EE()
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, ultron = new Ultron(ee);
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function foo() {}
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function bar() {}
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ee.once('foo', foo);
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ultron.once('foo', bar);
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assume(ee.listeners('foo').length).equals(2);
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ultron.remove('foo');
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assume(ee.listeners('foo').length).equals(1);
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assume(ee.listeners('foo')[0].listener).equals(foo);
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});
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it('removes all assigned events if called without args', function () {
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function foo() {}
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function bar() {}
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ultron.on('foo', foo);
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ultron.on('bar', bar);
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assume(ee.listeners('foo').length).equals(1);
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assume(ee.listeners('bar').length).equals(1);
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ultron.remove();
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assume(ee.listeners('foo').length).equals(0);
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assume(ee.listeners('bar').length).equals(0);
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});
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it('removes multiple listeners based on args', function () {
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function foo() {}
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function bar() {}
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function baz() {}
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ultron.on('foo', foo);
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ultron.on('bar', bar);
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ultron.on('baz', baz);
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assume(ee.listeners('foo').length).equals(1);
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assume(ee.listeners('bar').length).equals(1);
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assume(ee.listeners('baz').length).equals(1);
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ultron.remove('foo', 'bar');
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assume(ee.listeners('foo').length).equals(0);
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assume(ee.listeners('bar').length).equals(0);
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assume(ee.listeners('baz').length).equals(1);
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});
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it('removes multiple listeners if first arg is seperated string', function () {
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function foo() {}
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function bar() {}
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function baz() {}
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ultron.on('foo', foo);
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ultron.on('bar', bar);
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ultron.on('baz', baz);
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assume(ee.listeners('foo').length).equals(1);
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assume(ee.listeners('bar').length).equals(1);
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assume(ee.listeners('baz').length).equals(1);
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ultron.remove('foo, bar');
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assume(ee.listeners('foo').length).equals(0);
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assume(ee.listeners('bar').length).equals(0);
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assume(ee.listeners('baz').length).equals(1);
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});
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});
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describe('#destroy', function () {
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it('removes all listeners', function () {
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function foo() {}
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function bar() {}
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function baz() {}
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ultron.on('foo', foo);
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ultron.on('bar', bar);
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ultron.on('baz', baz);
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assume(ee.listeners('foo').length).equals(1);
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assume(ee.listeners('bar').length).equals(1);
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assume(ee.listeners('baz').length).equals(1);
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ultron.destroy();
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assume(ee.listeners('foo').length).equals(0);
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assume(ee.listeners('bar').length).equals(0);
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assume(ee.listeners('baz').length).equals(0);
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});
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it('removes the .ee reference', function () {
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assume(ultron.ee).equals(ee);
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ultron.destroy();
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assume(ultron.ee).equals(null);
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});
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it('returns booleans for state indication', function () {
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assume(ultron.destroy()).is.true();
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assume(ultron.destroy()).is.false();
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assume(ultron.destroy()).is.false();
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assume(ultron.destroy()).is.false();
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});
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});
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});
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