mirror of
https://github.com/RGBCube/serenity
synced 2025-07-26 23:57:34 +00:00
LibJS: Implement Promise.race on the Promise constructor
This commit is contained in:
parent
949f294444
commit
4f186a9a1f
2 changed files with 158 additions and 3 deletions
|
@ -202,6 +202,21 @@ static Value perform_promise_any(GlobalObject& global_object, Object& iterator_r
|
|||
});
|
||||
}
|
||||
|
||||
// 27.2.4.5.1 PerformPromiseRace ( iteratorRecord, constructor, resultCapability, promiseResolve ), https://tc39.es/ecma262/#sec-performpromiserace
|
||||
static Value perform_promise_race(GlobalObject& global_object, Object& iterator_record, Value constructor, PromiseCapability result_capability, Value promise_resolve)
|
||||
{
|
||||
auto& vm = global_object.vm();
|
||||
|
||||
return perform_promise_common(
|
||||
global_object, iterator_record, constructor, result_capability, promise_resolve,
|
||||
[&](PromiseValueList&) -> Value {
|
||||
return result_capability.promise;
|
||||
},
|
||||
[&](PromiseValueList&, RemainingElements&, Value next_promise, size_t) {
|
||||
(void)next_promise.invoke(global_object, vm.names.then, result_capability.resolve, result_capability.reject);
|
||||
});
|
||||
}
|
||||
|
||||
PromiseConstructor::PromiseConstructor(GlobalObject& global_object)
|
||||
: NativeFunction(vm().names.Promise.as_string(), *global_object.function_prototype())
|
||||
{
|
||||
|
@ -219,8 +234,7 @@ void PromiseConstructor::initialize(GlobalObject& global_object)
|
|||
define_native_function(vm.names.all, all, 1, attr);
|
||||
define_native_function(vm.names.allSettled, all_settled, 1, attr);
|
||||
define_native_function(vm.names.any, any, 1, attr);
|
||||
// TODO: Implement these functions below and uncomment this.
|
||||
// define_native_function(vm.names.race, race, 1, attr);
|
||||
define_native_function(vm.names.race, race, 1, attr);
|
||||
define_native_function(vm.names.reject, reject, 1, attr);
|
||||
define_native_function(vm.names.resolve, resolve, 1, attr);
|
||||
|
||||
|
@ -360,7 +374,32 @@ JS_DEFINE_NATIVE_FUNCTION(PromiseConstructor::any)
|
|||
// 27.2.4.5 Promise.race ( iterable ), https://tc39.es/ecma262/#sec-promise.race
|
||||
JS_DEFINE_NATIVE_FUNCTION(PromiseConstructor::race)
|
||||
{
|
||||
TODO();
|
||||
auto* constructor = vm.this_value(global_object).to_object(global_object);
|
||||
if (!constructor)
|
||||
return {};
|
||||
|
||||
auto promise_capability = new_promise_capability(global_object, constructor);
|
||||
if (vm.exception())
|
||||
return {};
|
||||
|
||||
auto promise_resolve = get_promise_resolve(global_object, constructor);
|
||||
if (auto abrupt = if_abrupt_reject_promise(global_object, promise_resolve, promise_capability); abrupt.has_value())
|
||||
return abrupt.value();
|
||||
|
||||
auto iterator_record = get_iterator(global_object, vm.argument(0));
|
||||
if (auto abrupt = if_abrupt_reject_promise(global_object, iterator_record, promise_capability); abrupt.has_value())
|
||||
return abrupt.value();
|
||||
|
||||
auto result = perform_promise_race(global_object, *iterator_record, constructor, promise_capability, promise_resolve);
|
||||
if (vm.exception()) {
|
||||
if (!iterator_record_is_complete(global_object, *iterator_record))
|
||||
iterator_close(*iterator_record);
|
||||
|
||||
auto abrupt = if_abrupt_reject_promise(global_object, result, promise_capability);
|
||||
return abrupt.value();
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
// 27.2.4.6 Promise.reject ( r ), https://tc39.es/ecma262/#sec-promise.reject
|
||||
|
|
116
Userland/Libraries/LibJS/Tests/builtins/Promise/Promise.race.js
Normal file
116
Userland/Libraries/LibJS/Tests/builtins/Promise/Promise.race.js
Normal file
|
@ -0,0 +1,116 @@
|
|||
test("length is 1", () => {
|
||||
expect(Promise.race).toHaveLength(1);
|
||||
});
|
||||
|
||||
describe("normal behavior", () => {
|
||||
test("returns a Promise", () => {
|
||||
const promise = Promise.race();
|
||||
expect(promise).toBeInstanceOf(Promise);
|
||||
});
|
||||
|
||||
test("resolve", () => {
|
||||
const promise1 = Promise.resolve(3);
|
||||
const promise2 = 42;
|
||||
const promise3 = new Promise((resolve, reject) => {
|
||||
resolve("foo");
|
||||
});
|
||||
|
||||
let resolvedValue = null;
|
||||
let wasRejected = false;
|
||||
|
||||
Promise.race([promise1, promise2, promise3]).then(
|
||||
value => {
|
||||
resolvedValue = value;
|
||||
},
|
||||
() => {
|
||||
wasRejected = true;
|
||||
}
|
||||
);
|
||||
|
||||
runQueuedPromiseJobs();
|
||||
expect(resolvedValue).toBe(3);
|
||||
expect(wasRejected).toBeFalse();
|
||||
});
|
||||
|
||||
test("reject", () => {
|
||||
const promise1 = new Promise((resolve, reject) => {
|
||||
reject("foo");
|
||||
});
|
||||
const promise2 = 42;
|
||||
const promise3 = Promise.resolve(3);
|
||||
|
||||
let rejectionReason = null;
|
||||
let wasResolved = false;
|
||||
|
||||
Promise.race([promise1, promise2, promise3]).then(
|
||||
() => {
|
||||
wasResolved = true;
|
||||
},
|
||||
reason => {
|
||||
rejectionReason = reason;
|
||||
}
|
||||
);
|
||||
|
||||
runQueuedPromiseJobs();
|
||||
expect(rejectionReason).toBe("foo");
|
||||
expect(wasResolved).toBeFalse();
|
||||
});
|
||||
});
|
||||
|
||||
describe("exceptional behavior", () => {
|
||||
test("cannot invoke capabilities executor twice", () => {
|
||||
function fn() {}
|
||||
|
||||
expect(() => {
|
||||
function promise(executor) {
|
||||
executor(fn, fn);
|
||||
executor(fn, fn);
|
||||
}
|
||||
|
||||
Promise.race.call(promise, []);
|
||||
}).toThrow(TypeError);
|
||||
|
||||
expect(() => {
|
||||
function promise(executor) {
|
||||
executor(fn, undefined);
|
||||
executor(fn, fn);
|
||||
}
|
||||
|
||||
Promise.race.call(promise, []);
|
||||
}).toThrow(TypeError);
|
||||
|
||||
expect(() => {
|
||||
function promise(executor) {
|
||||
executor(undefined, fn);
|
||||
executor(fn, fn);
|
||||
}
|
||||
|
||||
Promise.race.call(promise, []);
|
||||
}).toThrow(TypeError);
|
||||
});
|
||||
|
||||
test("promise without resolve method", () => {
|
||||
expect(() => {
|
||||
function promise(executor) {}
|
||||
Promise.race.call(promise, []);
|
||||
}).toThrow(TypeError);
|
||||
});
|
||||
|
||||
test("no parameters", () => {
|
||||
let rejectionReason = null;
|
||||
Promise.race().catch(reason => {
|
||||
rejectionReason = reason;
|
||||
});
|
||||
runQueuedPromiseJobs();
|
||||
expect(rejectionReason).toBeInstanceOf(TypeError);
|
||||
});
|
||||
|
||||
test("non-iterable", () => {
|
||||
let rejectionReason = null;
|
||||
Promise.race(1).catch(reason => {
|
||||
rejectionReason = reason;
|
||||
});
|
||||
runQueuedPromiseJobs();
|
||||
expect(rejectionReason).toBeInstanceOf(TypeError);
|
||||
});
|
||||
});
|
Loading…
Add table
Add a link
Reference in a new issue