tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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FileSystemFileHandle-sync-access-handle-back-forward-cache.https.tentative.window.js (2374B)

      1 // META: script=/common/dispatcher/dispatcher.js
      2 // META: script=/common/utils.js
      3 // META: script=resources/test-helpers.js
      4 // META: script=resources/messaging-helpers.js
      5 // META: script=/html/browsers/browsing-the-web/back-forward-cache/resources/rc-helper.js
      6 // META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
      7 // META: timeout=long
      8 
      9 'use strict';
     10 
     11 
     12 createBFCacheTest(async (t, testControls) => {
     13  const {getRemoteFuncs, assertBFCacheEligibility} = testControls;
     14  const [createAndReleaseSAH] = getRemoteFuncs('createAndReleaseSAH');
     15 
     16  for (const mode of SAH_MODES) {
     17    await createAndReleaseSAH(mode, 'hello.txt');
     18    await assertBFCacheEligibility(/*shouldRestoreFromBFCache=*/ true);
     19  }
     20 }, 'Creating an SAH should not make it ineligible for the BFCache.');
     21 
     22 createBFCacheTest(async (t, testControls) => {
     23  const origFile = 'hello.txt';
     24  const diffFile = 'world.txt';
     25 
     26  const {getRemoteFuncs, forward, back} = testControls;
     27  const [createSAH, releaseSAH, createAndReleaseSAH] =
     28      getRemoteFuncs('createSAH', 'releaseSAH', 'createAndReleaseSAH');
     29 
     30  async function testTakeLockOnForward(
     31      mode, fileName, shouldRestoreFromBFCache) {
     32    await forward();
     33 
     34    assert_true(await createAndReleaseSAH(mode, fileName));
     35 
     36    await back(shouldRestoreFromBFCache);
     37  }
     38 
     39  for (const backMode of SAH_MODES) {
     40    for (const forwMode of SAH_MODES) {
     41      const contentiousLocks = sahModesAreContentious(backMode, forwMode);
     42 
     43      // Create a lock on the page that will be BFCached.
     44      const lockId = await createSAH(backMode, origFile);
     45      assert_true(lockId !== undefined);
     46 
     47      // Navigating to a new page and taking a lock on a different file should
     48      // not evict the page from BFCache.
     49      await testTakeLockOnForward(
     50          forwMode, diffFile, /*shouldRestoreFromBFCache=*/ true);
     51 
     52      // Navigating to a new page and taking a lock on the same file should only
     53      // evict if the locks are contentious.
     54      await testTakeLockOnForward(
     55          forwMode, origFile, /*shouldRestoreFromBFCache=*/ !contentiousLocks);
     56 
     57      // Release the lock when there isn't contention since it won't have been
     58      // evicted.
     59      if (!contentiousLocks) {
     60        await releaseSAH(lockId);
     61      }
     62    }
     63  }
     64 }, `Creating a SAH on an active page evicts an inactive page on contention.`)