Promise tests

tests.js

it('has correct instance', function () {
	expect(Promise).to.be.a(Function);
});

it('has correct argument length', function () {
	expect(Promise.length).to.be(1);
});

describe('Section 2.1.2.1: When fulfilled, a promise: must not transition to any other state.', function () {
	var promise, deferred;

	beforeEach(function () {
		deferred = {};

		promise = new Promise(function () {
			deferred.resolve = arguments[0];
			deferred.reject = arguments[1];
		});
	});

	it('trying to fulfill immediately then reject immediately', function (done) {
		promise.then(function onFulfilled() {
			deferred.value = true;
		}, function onRejected() {
			deferred.value = false;
		});

		deferred.resolve();
		deferred.reject();

		setTimeout(function () {
			expect(deferred.value).to.be(true);

			done();
		}, 50);
	});

	it('trying to fulfill immediately then reject delayed', function (done) {
		promise.then(function onFulfilled() {
			deferred.value = true;
		}, function onRejected() {
			deferred.value = false;
		});

		deferred.resolve();

		setTimeout(function () {
			deferred.reject();

			setTimeout(function () {
				expect(deferred.value).to.be(true);

				done();
			}, 50);
		}, 50);
	});

	it('trying to fulfill delayed then reject delayed', function (done) {
		promise.then(function () {
			deferred.value = true;
		}, function () {
			deferred.value = false;
		});

		setTimeout(function () {
			deferred.resolve();

			setTimeout(function () {
				deferred.reject();

				setTimeout(function () {
					expect(deferred.value).to.be(true);

					done();
				}, 50);
			});
		}, 50);
	});
});

describe('Section 2.1.3.1: When rejected, a promise: must not transition to any other state.', function () {
	var promise, deferred;

	beforeEach(function () {
		deferred = {};

		promise = new Promise(function () {
			deferred.resolve = arguments[0];
			deferred.reject = arguments[1];
		});
	});

	it('trying to reject immediately then resolve immediately', function (done) {
		promise.then(function onFulfilled() {
			deferred.value = true;
		}, function onRejected() {
			deferred.value = false;
		});

		deferred.reject();
		deferred.resolve();

		setTimeout(function () {
			expect(deferred.value).to.be(false);

			done();
		}, 50);
	});

	it('trying to reject immediately then resolve delayed', function (done) {
		promise.then(function onFulfilled() {
			deferred.value = true;
		}, function onRejected() {
			deferred.value = false;
		});

		deferred.reject();

		setTimeout(function () {
			deferred.resolve();

			setTimeout(function () {
				expect(deferred.value).to.be(false);

				done();
			}, 50);
		}, 50);
	});

	it('trying to reject delayed then resolve delayed', function (done) {
		promise.then(function () {
			deferred.value = true;
		}, function () {
			deferred.value = false;
		});

		setTimeout(function () {
			deferred.reject();

			setTimeout(function () {
				deferred.resolve();

				setTimeout(function () {
					expect(deferred.value).to.be(false);

					done();
				}, 50);
			});
		}, 50);
	});
});