mode-shared.https.any.js (1314B)
1 // META: title=Web Locks API: Shared Mode 2 // META: global=window,dedicatedworker,sharedworker,serviceworker 3 4 'use strict'; 5 6 promise_test(async t => { 7 const granted = []; 8 function log_grant(n) { return () => { granted.push(n); }; } 9 10 await Promise.all([ 11 navigator.locks.request('a', {mode: 'shared'}, log_grant(1)), 12 navigator.locks.request('b', {mode: 'shared'}, log_grant(2)), 13 navigator.locks.request('c', {mode: 'shared'}, log_grant(3)), 14 navigator.locks.request('a', {mode: 'shared'}, log_grant(4)), 15 navigator.locks.request('b', {mode: 'shared'}, log_grant(5)), 16 navigator.locks.request('c', {mode: 'shared'}, log_grant(6)), 17 ]); 18 19 assert_array_equals(granted, [1, 2, 3, 4, 5, 6]); 20 }, 'Lock requests are granted in order'); 21 22 promise_test(async t => { 23 let a_acquired = false, a_acquired_again = false; 24 25 await navigator.locks.request('a', {mode: 'shared'}, async lock => { 26 a_acquired = true; 27 28 // Since lock is held, this request would be blocked if the 29 // lock was not 'shared', causing this test to time out. 30 31 await navigator.locks.request('a', {mode: 'shared'}, lock => { 32 a_acquired_again = true; 33 }); 34 }); 35 36 assert_true(a_acquired, 'first lock acquired'); 37 assert_true(a_acquired_again, 'second lock acquired'); 38 }, 'Shared locks are not exclusive');