91 lines
2.7 KiB
JavaScript
91 lines
2.7 KiB
JavaScript
// META: title=Web Locks API: Lock held until callback result resolves
|
|
// META: script=resources/helpers.js
|
|
// META: global=window,dedicatedworker,sharedworker,serviceworker
|
|
|
|
'use strict';
|
|
|
|
// For uncaught rejections.
|
|
setup({allow_uncaught_exception: true});
|
|
|
|
function snooze(t, ms) { return new Promise(r => t.step_timeout(r, ms)); }
|
|
|
|
promise_test(async t => {
|
|
const res = uniqueName(t);
|
|
const p = navigator.locks.request(res, lock => 123);
|
|
assert_equals(Promise.resolve(p), p, 'request() result is a Promise');
|
|
assert_equals(await p, 123, 'promise resolves to the returned value');
|
|
}, 'callback\'s result is promisified if not async');
|
|
|
|
promise_test(async t => {
|
|
const res = uniqueName(t);
|
|
// Resolved when the lock is granted.
|
|
let granted;
|
|
const lock_granted_promise = new Promise(r => { granted = r; });
|
|
|
|
// Lock is held until this is resolved.
|
|
let resolve;
|
|
const lock_release_promise = new Promise(r => { resolve = r; });
|
|
|
|
const order = [];
|
|
|
|
navigator.locks.request(res, lock => {
|
|
granted(lock);
|
|
return lock_release_promise;
|
|
});
|
|
await lock_granted_promise;
|
|
|
|
await Promise.all([
|
|
snooze(t, 50).then(() => {
|
|
order.push('1st lock released');
|
|
resolve();
|
|
}),
|
|
navigator.locks.request(res, () => {
|
|
order.push('2nd lock granted');
|
|
})
|
|
]);
|
|
|
|
assert_array_equals(order, ['1st lock released', '2nd lock granted']);
|
|
}, 'lock is held until callback\'s returned promise resolves');
|
|
|
|
promise_test(async t => {
|
|
const res = uniqueName(t);
|
|
// Resolved when the lock is granted.
|
|
let granted;
|
|
const lock_granted_promise = new Promise(r => { granted = r; });
|
|
|
|
// Lock is held until this is rejected.
|
|
let reject;
|
|
const lock_release_promise = new Promise((_, r) => { reject = r; });
|
|
|
|
const order = [];
|
|
|
|
navigator.locks.request(res, lock => {
|
|
granted(lock);
|
|
return lock_release_promise;
|
|
});
|
|
await lock_granted_promise;
|
|
|
|
await Promise.all([
|
|
snooze(t, 50).then(() => {
|
|
order.push('reject');
|
|
reject(new Error('this uncaught rejection is expected'));
|
|
}),
|
|
navigator.locks.request(res, () => {
|
|
order.push('2nd lock granted');
|
|
})
|
|
]);
|
|
|
|
assert_array_equals(order, ['reject', '2nd lock granted']);
|
|
}, 'lock is held until callback\'s returned promise rejects');
|
|
|
|
promise_test(async t => {
|
|
const res = uniqueName(t);
|
|
let callback_called = false;
|
|
await navigator.locks.request(res, async lock => {
|
|
await navigator.locks.request(res, {ifAvailable: true}, lock => {
|
|
callback_called = true;
|
|
assert_equals(lock, null, 'lock request should fail if held');
|
|
});
|
|
});
|
|
assert_true(callback_called, 'callback should have executed');
|
|
}, 'held lock prevents the same client from acquiring it');
|