hellojs-xiaotian/tests/specs/unit/utils/events.js

A clientside Javascript library for standardizing requests to OAuth2 web services (and OAuth1 - with a shim)

define([], function() {

	var utils = hello.utils;

	describe('utils.event', function() {

		var hello;
		var arbitaryData;
		var eventName;

		beforeEach(function() {

			// Pass an arbitary piece of data around
			arbitaryData = {boom:true};

			eventName = 'custom';

			hello = {
				utils: utils
			};
			utils.Event.call(hello);
		});

		it('should bind events by name and be able to trigger them by name', function() {

			// Make request
			var spy = sinon.spy(function(data, type) {

				expect(eventName).to.be(type);

				expect(arbitaryData).to.be(data);

			});

			hello.on(eventName, spy);

			hello.emit(eventName, arbitaryData);

			expect(spy.called).to.be.ok();
		});

		it('should listen to any event by using a "*"', function() {

			// Make request
			var spy = sinon.spy(function(data, type) {

				expect(eventName).to.be(type);

				expect(arbitaryData).to.be(data);

			});

			hello.on('*', spy);

			hello.emit(eventName, arbitaryData);

			expect(spy.called).to.be.ok();
		});

		it('should unbind an event by name and callback', function() {

			// Listeners
			var spy = sinon.spy(function() {
				// Should not be called.
			});

			var spy2 = sinon.spy(function() {
				// Should not be called.
			});

			// Bind
			hello.on(eventName, spy);

			hello.on(eventName, spy2);

			// Remove
			hello.off(eventName, spy);

			// Trigger
			hello.emit(eventName);

			// Test spies
			expect(!spy.called).to.be.ok();
			expect(spy2.called).to.be.ok();

		});

		it('should unbind all events by name', function() {

			// Listeners
			var spy = sinon.spy(function() {
				// Should not be called.
			});

			var spy2 = sinon.spy(function() {
				// Should not be called.
			});

			// Bind
			hello.on(eventName, spy);

			hello.on(eventName, spy2);

			// Remove
			hello.off(eventName);

			// Trigger
			hello.emit(eventName);

			// Test spies
			expect(!spy.called).to.be.ok();
			expect(!spy2.called).to.be.ok();

		});

		it('should trigger events on its proto (predecessor in chain)', function() {

			// PROTO
			// Listeners
			var spy = sinon.spy(function() {
				// Should not be called.
			});

			// Bind
			hello.on(eventName, spy);

			// PROTO
			var child = Object.create(hello);

			var spy2 = sinon.spy(function() {
				// Should not be called.
			});

			hello.on(eventName, spy2);

			// Trigger
			hello.emit(eventName);

			// Test spies
			expect(spy.called).to.be.ok();
			expect(spy2.called).to.be.ok();

		});

	});

});