97 lines
2.7 KiB
JavaScript
97 lines
2.7 KiB
JavaScript
var failIfThrows = function (done) {
|
|
'use strict';
|
|
|
|
return function (e) {
|
|
done(e || new Error());
|
|
};
|
|
};
|
|
|
|
describe('Promise', function () {
|
|
'use strict';
|
|
|
|
specify('sanity check: a fulfilled promise calls its fulfillment handler', function (done) {
|
|
Promise.resolve(5).then(function (value) {
|
|
assert.strictEqual(value, 5);
|
|
}).then(done, failIfThrows(done));
|
|
});
|
|
|
|
specify('directly resolving the promise with itself', function (done) {
|
|
var resolvePromise;
|
|
var promise = new Promise(function (resolve) { resolvePromise = resolve; });
|
|
|
|
resolvePromise(promise);
|
|
|
|
promise.then(
|
|
function () {
|
|
assert(false, 'Should not be fulfilled');
|
|
},
|
|
function (err) {
|
|
assert(err instanceof TypeError);
|
|
}
|
|
).then(done, failIfThrows(done));
|
|
});
|
|
|
|
specify('Stealing a resolver and using it to trigger possible reentrancy bug (#83)', function () {
|
|
var stolenResolver;
|
|
var StealingPromiseConstructor = function StealingPromiseConstructor(resolver) {
|
|
stolenResolver = resolver;
|
|
resolver(function () { }, function () { });
|
|
};
|
|
|
|
var iterable = {};
|
|
var atAtIterator = '@@iterator'; // on firefox, at least.
|
|
iterable[atAtIterator] = function () {
|
|
stolenResolver(null, null);
|
|
throw new Error(0);
|
|
};
|
|
|
|
assert.doesNotThrow(function () {
|
|
Promise.all.call(StealingPromiseConstructor, iterable);
|
|
});
|
|
});
|
|
|
|
specify('resolve with a thenable calls it once', function () {
|
|
var resolve;
|
|
var p = new Promise(function (r) { resolve = r; });
|
|
var count = 0;
|
|
resolve({
|
|
then: function () {
|
|
count += 1;
|
|
throw new RangeError('reject the promise');
|
|
}
|
|
});
|
|
var a = p.then(function () {})['catch'](function (err) {
|
|
assert.equal(count, 1);
|
|
assert.ok(err instanceof RangeError);
|
|
});
|
|
var b = p.then(function () {})['catch'](function (err) {
|
|
assert.equal(count, 1);
|
|
assert.ok(err instanceof RangeError);
|
|
});
|
|
return Promise.all([a, b]);
|
|
});
|
|
|
|
specify('resolve with a thenable that throws on .then, rejects the promise synchronously', function () {
|
|
var resolve;
|
|
var p = new Promise(function (r) { resolve = r; });
|
|
var count = 0;
|
|
var thenable = Object.defineProperty({}, 'then', {
|
|
get: function () {
|
|
count += 1;
|
|
throw new RangeError('no then for you');
|
|
}
|
|
});
|
|
resolve(thenable);
|
|
assert.equal(count, 1);
|
|
var a = p.then(function () {})['catch'](function (err) {
|
|
assert.equal(count, 1);
|
|
assert.ok(err instanceof RangeError);
|
|
});
|
|
var b = p.then(function () {})['catch'](function (err) {
|
|
assert.equal(count, 1);
|
|
assert.ok(err instanceof RangeError);
|
|
});
|
|
return Promise.all([a, b]);
|
|
});
|
|
});
|