web-locks.tentative.https.sub.html

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This WPT test may be referenced by the following Test IDs:
- /shared-storage/web-locks.tentative.https.sub.html - WPT Dashboard Interop Dashboard

<!doctype html>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/common/utils.js"></script>

<script src="/shared-storage/resources/util.js"></script>

<script src="/fenced-frame/resources/utils.js"></script>

<body>

<script>

'use strict';

promise_test(async t => {

  let worklet1 = await sharedStorage.createWorklet('resources/simple-module.js');

  let worklet2 = await sharedStorage.createWorklet('resources/simple-module.js');

  const ancestor_key1 = token();

  let url1_0 = generateURL("/shared-storage/resources/frame0.html",

                         [ancestor_key1]);

  let url1_1 = generateURL("/shared-storage/resources/frame1.html",

                         [ancestor_key1]);

  const ancestor_key2 = token();

  let url2_0 = generateURL("/shared-storage/resources/frame0.html",

                         [ancestor_key2]);

  let url2_1 = generateURL("/shared-storage/resources/frame1.html",

                         [ancestor_key2]);

  // Two `selectURL()`s run in parallel. Each performs the following steps:

  // 1. Acquires the lock.

  // 2. Reads the current value of the given key.

  // 3. Waits for 100ms.

  // 4. Increments the value.

  // 5. Releases the lock.

//

  // Expected behavior: After both operations finish, the value of the given key

  // should be 2.

//

  // This demonstrates that the lock is effective, preventing the

  // "get and increment" operations from interleaving. If the lock were not

  // used, both worklets would likely read 0 and set the value to 1.

  let select_url_result1 = await worklet1.selectURL(

      "get-wait-increment-within-lock", [{url: url1_0}, {url: url1_1}],

      {data: {'key': 'key'}, resolveToConfig: true});

  let select_url_result2 = await worklet2.selectURL(

      "get-wait-increment-within-lock", [{url: url2_0}, {url: url2_1}],

      {data: {'key': 'key'}, resolveToConfig: true});

  attachFencedFrame(select_url_result1, 'opaque-ads');

  const result1 = await nextValueFromServer(ancestor_key1);

  assert_equals(result1, "frame1_loaded");

  attachFencedFrame(select_url_result2, 'opaque-ads');

  const result2 = await nextValueFromServer(ancestor_key2);

  assert_equals(result2, "frame1_loaded");

  await verifyKeyValueForOrigin('key', '2', location.origin);

}, 'Basic test for Web Locks API in the shared storage worklet');

</script>

</body>