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'use strict';
var aplus = require('promises-aplus-tests');
var Promise = require('../lib');
var adapter = {};
var assert = require('assert');
adapter.deferred = function () {
var pending = {};
pending.promise = new Promise(function (resolver, reject) {
pending.resolve = resolver;
pending.reject = reject;
});
return pending;
};
adapter.resolved = function (value) {
return Promise.resolve(value);
}
adapter.rejected = function (reason) {
return Promise.reject(reason);
}
describe('Lie', function () {
it('should work resolving a promise new', function (done) {
new Promise(function (resolve) {
resolve(new Promise(function (resolve) {
resolve(true);
}));
}).then(function (result) {
if (result === true) {
done();
} else {
done(true);
}
});
});
it('should throw if you don\'t pass a function', function (done) {
try {
new Promise(true);
} catch (e) {
if (e instanceof TypeError) {
done();
} else {
done(e);
}
}
});
it('should have a working catch method', function (done) {
new Promise(function () {
throw new Error('boom');
}).catch(function () {
done();
});
});
describe('resolve', function () {
it('should work with true', function (done) {
Promise.resolve(true).then(function (value) {
if (value === true) {
done();
} else {
done(true);
}
});
});
it('should work with false', function (done) {
Promise.resolve(false).then(function (value) {
if (value === false) {
done();
} else {
done(true);
}
});
});
it('should work with null', function (done) {
Promise.resolve(null).then(function (value) {
if (value === null) {
done();
} else {
done(true);
}
});
});
it('should work with undefined', function (done) {
Promise.resolve(undefined).then(function (value) {
if (value === undefined) {
done();
} else {
done(true);
}
});
});
it('should work with 0', function (done) {
Promise.resolve(0).then(function (value) {
value++;
return Promise.resolve(0);
}).then(function (value) {
if (value === 0) {
done();
} else {
done(true);
}
});
});
it('should work with 1', function (done) {
Promise.resolve(1).then(function (value) {
if (value === 1) {
done();
} else {
done(true);
}
});
});
it('should work with \'\'', function (done) {
Promise.resolve('').then(function (value) {
if (value === '') {
done();
} else {
done(true);
}
});
});
it('should work with \'something\'', function (done) {
Promise.resolve('something').then(function (value) {
if (value === 'something') {
done();
} else {
done(true);
}
});
});
});
describe('Promise.all', function () {
//https://github.com/domenic/promises-unwrapping/blob/master/reference-implementation/test/all.js
it('fulfills if passed an empty array', function (done) {
var iterable = [];
Promise.all(iterable).then(function (value) {
assert(Array.isArray(value));
assert.deepEqual(value, []);
done();
});
});
it('fulfills if passed an array of mixed fulfilled promises and values', function (done) {
var iterable = [0, Promise.resolve(1), 2, Promise.resolve(3)];
Promise.all(iterable).then(function (value) {
assert(Array.isArray(value));
assert.deepEqual(value, [0, 1, 2, 3]);
done();
});
});
it('rejects if any passed promise is rejected', function (done) {
var foreverPending = new Promise(function () {});
var error = new Error('Rejected');
var rejected = Promise.reject(error);
var iterable = [foreverPending, rejected];
Promise.all(iterable).then(
function (value) {
assert(false, 'should never get here');
done();
},
function (reason) {
assert.strictEqual(reason, error);
done();
}
);
});
it('resolves foreign thenables', function (done) {
var normal = Promise.resolve(1);
var foreign = { then: function (f) { f(2); } };
var iterable = [normal, foreign];
Promise.all(iterable).then(function (value) {
assert.deepEqual(value, [1, 2]);
done();
});
});
it('does not reject twice', function (done) {
var normal = Promise.resolve(1);
var error = new Error('rejected once');
var two = Promise.reject(error);
var three = new Promise(function (resolve, reject) {
setTimeout(function () {
reject(new Error('rejected twice'));
}, 30);
});
var iterable = [normal, two, three];
Promise.all(iterable).then(function (value) {
assert(false, 'should never get here');
done();
}, function (value) {
assert.deepEqual(value, error);
done();
});
});
it('fulfills when passed an sparse array, giving `undefined` for the omitted values', function (done) {
var iterable = [Promise.resolve(0), , , Promise.resolve(1)];
Promise.all(iterable).then(function (value) {
assert.deepEqual(value, [0, undefined, undefined, 1]);
done();
});
});
it('does not modify the input array', function (done) {
var input = [0, 1];
var iterable = input;
Promise.all(iterable).then(function (value) {
assert.notStrictEqual(input, value);
done();
});
});
it('should reject with a TypeError if given a non-iterable', function (done) {
var notIterable = {};
Promise.all(notIterable).then(
function () {
assert(false, 'should never get here');
done();
},
function (reason) {
assert(reason instanceof TypeError);
done();
}
);
});
});
describe('Promise.race', function () {
//https://github.com/domenic/promises-unwrapping/blob/master/reference-implementation/test/all.js
function delay(value, time, rejectIt) {
return new Promise(function (resolve, reject) {
setTimeout(function () {
if (rejectIt) {
return reject(value);
}
resolve(value);
}, time);
});
}
it('fulfills if passed an empty array', function (done) {
var iterable = [];
Promise.race(iterable).then(function (value) {
assert(Array.isArray(value));
assert.deepEqual(value, []);
done();
});
});
it('fulfills if passed an array of mixed fulfilled promises and values', function (done) {
var iterable = [delay(0, 20), Promise.resolve(1), delay(2, 30), delay(Promise.resolve(3), 20)];
Promise.race(iterable).then(function (value) {
assert.equal(value, 1);
done();
});
});
it('rejects if firsed resolved promise is rejected', function (done) {
var error = new Error('Rejected');
var iterable = [delay(true, 300), delay(error, 20, true)];
Promise.race(iterable).then(
function (value) {
assert(false, 'should never get here');
done();
},
function (reason) {
assert.strictEqual(reason, error);
done();
}
);
});
it('resolves if second resolved promise is rejected', function (done) {
var error = new Error('Rejected');
var iterable = [delay(true, 30), delay(error, 200, true)];
Promise.race(iterable).then(
function (value) {
assert(value, 'should resolve');
done();
},
function (reason) {
assert(false, 'should never get here');
done();
}
);
});
it('resolves foreign thenables', function (done) {
var normal = Promise.resolve(1);
var foreign = { then: function (f) { f(2); } };
var iterable = [delay(Promise.resolve(1), 200), foreign];
Promise.race(iterable).then(function (value) {
assert.deepEqual(value, 2);
done();
});
});
it('fulfills when passed an sparse array, giving `undefined` for the omitted values', function (done) {
var iterable = [delay(Promise.resolve(0), 300), , , delay(Promise.resolve(1), 300)];
Promise.race(iterable).then(function (value) {
assert.equal(value, undefined);
done();
});
});
it('should reject with a TypeError if given a non-iterable', function (done) {
var notIterable = {};
Promise.race(notIterable).then(
function () {
assert(false, 'should never get here');
done();
},
function (reason) {
assert(reason instanceof TypeError);
done();
}
);
});
});
/*
if (!process.browser) {
it('should emit events for unhandled errors', function (done) {
var called = 0;
var err1 = new Error('should be caught');
var err2 = new Error('should be uncaught');
var promise1 = Promise.reject(err1);
var promise2 = Promise.reject(err2);
promise1.catch(function () {});
function onEvent(reason, promise) {
if (!called) {
called++;
assert.equal(err2, reason);
assert.equal(promise2, promise);
setTimeout(function (){
process.removeListener('unhandledRejection', onEvent);
done();
}, 100)
} else {
done(new Error('called more then once'));
}
}
process.on('unhandledRejection', onEvent);
});
}
*/
describe('Promises/A+ Tests', function () {
aplus.mocha(adapter);
});
});
var P = Promise;
var someRejectionReason = { message: 'some rejection reason' };
var anotherReason = { message: 'another rejection reason' };
describe('mocha promise sanity check', function () {
it('passes with a resolved promise', function () {
return P.resolve(3);
});
it('passes with a rejected then resolved promise', function () {
return P.reject(someRejectionReason).catch(function (x) {
return 'this should be resolved';
});
});
var ifPromiseIt = P === Promise ? it : it.skip;
ifPromiseIt('is the native Promise', function () {
assert.equal(P, Promise);
});
});
describe('onFinally', function () {
describe('no callback', function () {
specify('from resolved', function () {
return adapter.resolved(3)
.then(function (x) {
assert.strictEqual(x, 3);
return x;
})
.finally()
.then(function onFulfilled(x) {
assert.strictEqual(x, 3);
}, function onRejected() {
throw new Error('should not be called');
});
});
specify('from rejected', function () {
return adapter.rejected(someRejectionReason)
.catch(function (e) {
assert.strictEqual(e, someRejectionReason);
throw e;
})
.finally()
.then(function onFulfilled() {
throw new Error('should not be called');
}, function onRejected(reason) {
assert.strictEqual(reason, someRejectionReason);
});
});
});
describe('throws an exception', function () {
specify('from resolved', function () {
return adapter.resolved(3)
.then(function (x) {
assert.strictEqual(x, 3);
return x;
})
.finally(function onFinally() {
assert(arguments.length === 0);
throw someRejectionReason;
}).then(function onFulfilled() {
throw new Error('should not be called');
}, function onRejected(reason) {
assert.strictEqual(reason, someRejectionReason);
});
});
specify('from rejected', function () {
return adapter.rejected(anotherReason).finally(function onFinally() {
assert(arguments.length === 0);
throw someRejectionReason;
}).then(function onFulfilled() {
throw new Error('should not be called');
}, function onRejected(reason) {
assert.strictEqual(reason, someRejectionReason);
});
});
});
describe('returns a non-promise', function () {
specify('from resolved', function () {
return adapter.resolved(3)
.then(function (x) {
assert.strictEqual(x, 3);
return x;
})
.finally(function onFinally() {
assert(arguments.length === 0);
return 4;
}).then(function onFulfilled(x) {
assert.strictEqual(x, 3);
}, function onRejected() {
throw new Error('should not be called');
});
});
specify('from rejected', function () {
return adapter.rejected(anotherReason)
.catch(function (e) {
assert.strictEqual(e, anotherReason);
throw e;
})
.finally(function onFinally() {
assert(arguments.length === 0);
throw someRejectionReason;
}).then(function onFulfilled() {
throw new Error('should not be called');
}, function onRejected(e) {
assert.strictEqual(e, someRejectionReason);
});
});
});
describe('returns a pending-forever promise', function () {
specify('from resolved', function (done) {
adapter.resolved(3)
.then(function (x) {
assert.strictEqual(x, 3);
return x;
})
.finally(function onFinally() {
assert(arguments.length === 0);
setTimeout(done, 0.1e3);
return new P(function () {}); // forever pending
}).then(function onFulfilled(x) {
throw new Error('should not be called');
}, function onRejected() {
throw new Error('should not be called');
});
});
specify('from rejected', function (done) {
adapter.rejected(someRejectionReason)
.catch(function (e) {
assert.strictEqual(e, someRejectionReason);
throw e;
})
.finally(function onFinally() {
assert(arguments.length === 0);
setTimeout(done, 0.1e3);
return new P(function () {}); // forever pending
}).then(function onFulfilled(x) {
throw new Error('should not be called');
}, function onRejected() {
throw new Error('should not be called');
});
});
});
describe('returns an immediately-fulfilled promise', function () {
specify('from resolved', function () {
return adapter.resolved(3)
.then(function (x) {
assert.strictEqual(x, 3);
return x;
})
.finally(function onFinally() {
assert(arguments.length === 0);
return adapter.resolved(4);
}).then(function onFulfilled(x) {
assert.strictEqual(x, 3);
}, function onRejected() {
throw new Error('should not be called');
});
});
specify('from rejected', function () {
return adapter.rejected(someRejectionReason)
.catch(function (e) {
assert.strictEqual(e, someRejectionReason);
throw e;
})
.finally(function onFinally() {
assert(arguments.length === 0);
return adapter.resolved(4);
}).then(function onFulfilled() {
throw new Error('should not be called');
}, function onRejected(e) {
assert.strictEqual(e, someRejectionReason);
});
});
});
describe('returns an immediately-rejected promise', function () {
specify('from resolved ', function () {
return adapter.resolved(3)
.then(function (x) {
assert.strictEqual(x, 3);
return x;
})
.finally(function onFinally() {
assert(arguments.length === 0);
return adapter.rejected(4);
}).then(function onFulfilled(x) {
throw new Error('should not be called');
}, function onRejected(e) {
assert.strictEqual(e, 4);
});
});
specify('from rejected', function () {
var newReason = {};
return adapter.rejected(someRejectionReason)
.catch(function (e) {
assert.strictEqual(e, someRejectionReason);
throw e;
})
.finally(function onFinally() {
assert(arguments.length === 0);
return adapter.rejected(newReason);
}).then(function onFulfilled(x) {
throw new Error('should not be called');
}, function onRejected(e) {
assert.strictEqual(e, newReason);
});
});
});
describe('returns a fulfilled-after-a-second promise', function () {
specify('from resolved', function (done) {
adapter.resolved(3)
.then(function (x) {
assert.strictEqual(x, 3);
return x;
})
.finally(function onFinally() {
assert(arguments.length === 0);
setTimeout(done, 1.5e3);
return new P(function (resolve) {
setTimeout(function () {resolve(4)}, 1e3);
});
}).then(function onFulfilled(x) {
assert.strictEqual(x, 3);
}, function onRejected() {
throw new Error('should not be called');
});
});
specify('from rejected', function (done) {
adapter.rejected(3)
.catch(function (e) {
assert.strictEqual(e, 3);
throw e;
})
.finally(function onFinally() {
assert(arguments.length === 0);
setTimeout(done, 1.5e3);
return new P(function (resolve) {
setTimeout(function () {resolve(4)}, 1e3);
});
}).then(function onFulfilled() {
throw new Error('should not be called');
}, function onRejected(e) {
assert.strictEqual(e, 3);
});
});
});
describe('returns a rejected-after-a-second promise', function () {
specify('from resolved', function (done) {
adapter.resolved(3)
.then(function (x) {
assert.strictEqual(x, 3);
return x;
})
.finally(function onFinally() {
assert(arguments.length === 0);
setTimeout(done, 1.5e3);
return new P(function (resolve, reject) {
setTimeout(function (){ reject(4)}, 1e3);
});
}).then(function onFulfilled(x) {
assert.strictEqual(x, 3);
}, function onRejected() {
throw new Error('should not be called');
});
});
specify('from rejected', function (done) {
adapter.rejected(someRejectionReason)
.catch(function (e) {
assert.strictEqual(e, someRejectionReason);
throw e;
})
.finally(function onFinally() {
assert(arguments.length === 0);
setTimeout(done, 1.5e3);
return new P(function (resolve, reject) {
setTimeout(function (){ reject(anotherReason)}, 1e3);
});
}).then(function onFulfilled() {
throw new Error('should not be called');
}, function onRejected(e) {
assert.strictEqual(e, anotherReason);
});
});
});
});
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