web-locks-pa-worklet-modifier-method.tentative.https.window.js

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

// META: script=/resources/testdriver.js

// META: script=/resources/testdriver-vendor.js

// META: script=/common/utils.js

// META: script=/fledge/tentative/resources/fledge-util.sub.js

// META: script=/common/subset-tests.js

// META: script=/shared-storage/resources/util.js

// META: script=/fenced-frame/resources/utils.js

// META: timeout=long

"use strict;"

subsetTest(promise_test, async test => {

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

  const ancestor_key = token();

  let url0 = generateURL("/shared-storage/resources/frame0.html",

                         [ancestor_key]);

  let url1 = generateURL("/shared-storage/resources/frame1.html",

                         [ancestor_key]);

  // Override the default resource path, as we are not running within the Fledge

  // repository.

  RESOURCE_PATH = '/fledge/tentative/resources/';

  const pa_uuid = generateUuid(test);

  let biddingLogicURL = createBiddingScriptURL(

      generateBid:

          sharedStorage.append('key', 'a', {withLock: 'lock1'});

          return {};

});

  let decisionLogicURL = createDecisionScriptURL(pa_uuid);

  // Invoke `selectURL()` to perform the following steps:

  // 1. Acquires the lock.

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

  // 3. Waits for 500ms.

  // 4. Sets the shared storage value to the read value appended with the given letter.

  // 5. Releases the lock.

//

  // After 100ms, run a Protected Audience auction which triggers `append()`

  // with the same lock and the same letter.

//

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

  // should contain the letter repeated twice.

//

  // This demonstrates that the `withLock` option is effective, preventing the

  // `append()` method interfering with the "get and set" operation. If the lock

  // were not used, the final value would likely be a single letter.

//

  // Note: This test remains valid even if the `append()` happens outside

  // the critical section protected by the lock within the worklet. The test

  // effectively demonstrates mutual exclusion as long as there's a reasonable

  // chance for `append()` to occur while the worklet is still running.

  let select_url_result = await worklet.selectURL(

      "get-wait-set-within-lock",

      [{url: url0}, {url: url1}],

      {data: {'key': 'key',

              'lock_name': 'lock1',

              'append_letter': 'a'},

      resolveToConfig: true});

  // Busy wait for 100ms.

  const startWaitTime = Date.now();

  while (Date.now() - startWaitTime < 100) {}

  // Run a Protected Audience auction which triggers `append()`` with the same

  // lock and the same letter.

  await joinGroupAndRunBasicFledgeTestExpectingNoWinner(

    test,

      uuid: pa_uuid,

      interestGroupOverrides: {

        name: pa_uuid,

        biddingLogicURL: biddingLogicURL,

},

      auctionConfigOverrides: {

        decisionLogicURL: decisionLogicURL

});

  attachFencedFrame(select_url_result, 'opaque-ads');

  const result = await nextValueFromServer(ancestor_key);

  assert_equals(result, "frame1_loaded");

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

  await deleteKeyForOrigin('key', location.origin);

}, 'Test for withLock option in a Protected Audience Worklet context');