web-locks-window-modifier-method.tentative.https.sub.html (2489B)
1 <!doctype html> 2 <script src="/resources/testharness.js"></script> 3 <script src="/resources/testharnessreport.js"></script> 4 <script src="/common/utils.js"></script> 5 <script src="/shared-storage/resources/util.js"></script> 6 <script src="/fenced-frame/resources/utils.js"></script> 7 8 <body> 9 <script> 10 'use strict'; 11 12 promise_test(async t => { 13 let worklet = await sharedStorage.createWorklet('resources/simple-module.js'); 14 15 const ancestor_key = token(); 16 let url0 = generateURL("/shared-storage/resources/frame0.html", 17 [ancestor_key]); 18 let url1 = generateURL("/shared-storage/resources/frame1.html", 19 [ancestor_key]); 20 21 // Invoke `selectURL()` to perform the following steps: 22 // 1. Acquires the lock. 23 // 2. Reads the current value at the given key. 24 // 3. Waits for 500ms. 25 // 4. Sets the shared storage value to the read value appended with the given letter. 26 // 5. Releases the lock. 27 // 28 // After 100ms, invoke `sharedStorage.append()` with the same lock and the 29 // same letter to append. 30 // 31 // Expected behavior: After both of them finish, the value at the given key 32 // should contain the letter repeated twice. 33 // 34 // This demonstrates that the `withLock` option is effective, preventing the 35 // `append()` method interfering with the "get and set" operation. If the lock 36 // were not used, the final value would likely be a single letter. 37 // 38 // Note: This test remains valid even if the `append()` call happens outside 39 // the critical section protected by the lock within the worklet. The test 40 // effectively demonstrates mutual exclusion as long as there's a reasonable 41 // chance for `append()` to occur while the worklet is still running. 42 let select_url_result = await worklet.selectURL( 43 "get-wait-set-within-lock", 44 [{url: url0}, {url: url1}], 45 {data: {'key': 'key', 46 'lock_name': 'lock1', 47 'append_letter': 'a'}, 48 resolveToConfig: true}); 49 50 // Busy wait for 100ms. 51 const startWaitTime = Date.now(); 52 while (Date.now() - startWaitTime < 100) {} 53 54 sharedStorage.append('key', 'a', {withLock: 'lock1'}); 55 56 attachFencedFrame(select_url_result, 'opaque-ads'); 57 const result = await nextValueFromServer(ancestor_key); 58 assert_equals(result, "frame1_loaded"); 59 60 await verifyKeyValueForOrigin('key', 'aa', location.origin); 61 62 await deleteKeyForOrigin('key', location.origin); 63 }, 'Test for withLock option in a Window context'); 64 65 </script> 66 </body>