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// META: script=/common/dispatcher/dispatcher.js
// META: script=/common/utils.js
// META: script=resources/test-helpers.js
// META: script=resources/messaging-helpers.js
// META: script=/html/browsers/browsing-the-web/back-forward-cache/resources/rc-helper.js
// META: script=/html/browsers/browsing-the-web/remote-context-helper/resources/remote-context-helper.js
// META: timeout=long
'use strict';
createBFCacheTest(async (t, testControls) => {
const {getRemoteFuncs, assertBFCacheEligibility} = testControls;
const [createAndReleaseSAH] = getRemoteFuncs('createAndReleaseSAH');
for (const mode of SAH_MODES) {
await createAndReleaseSAH(mode, 'hello.txt');
await assertBFCacheEligibility(/*shouldRestoreFromBFCache=*/ true);
}
}, 'Creating an SAH should not make it ineligible for the BFCache.');
createBFCacheTest(async (t, testControls) => {
const origFile = 'hello.txt';
const diffFile = 'world.txt';
const {getRemoteFuncs, forward, back} = testControls;
const [createSAH, releaseSAH, createAndReleaseSAH] =
getRemoteFuncs('createSAH', 'releaseSAH', 'createAndReleaseSAH');
async function testTakeLockOnForward(
mode, fileName, shouldRestoreFromBFCache) {
await forward();
assert_true(await createAndReleaseSAH(mode, fileName));
await back(shouldRestoreFromBFCache);
}
for (const backMode of SAH_MODES) {
for (const forwMode of SAH_MODES) {
const contentiousLocks = sahModesAreContentious(backMode, forwMode);
// Create a lock on the page that will be BFCached.
const lockId = await createSAH(backMode, origFile);
assert_true(lockId !== undefined);
// Navigating to a new page and taking a lock on a different file should
// not evict the page from BFCache.
await testTakeLockOnForward(
forwMode, diffFile, /*shouldRestoreFromBFCache=*/ true);
// Navigating to a new page and taking a lock on the same file should only
// evict if the locks are contentious.
await testTakeLockOnForward(
forwMode, origFile, /*shouldRestoreFromBFCache=*/ !contentiousLocks);
// Release the lock when there isn't contention since it won't have been
// evicted.
if (!contentiousLocks) {
await releaseSAH(lockId);
}
}
}
}, `Creating a SAH on an active page evicts an inactive page on contention.`)
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