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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
// Simple tab wrapper abstracting our messaging mechanism;
class KnownTab {
constructor(name, tab) {
this.name = name;
this.tab = tab;
}
cleanup() {
this.tab = null;
}
}
// Simple data structure class to help us track opened tabs and their pids.
class KnownTabs {
constructor() {
this.byPid = new Map();
this.byName = new Map();
}
cleanup() {
for (let key of this.byPid.keys()) {
this.byPid[key] = null;
}
this.byPid = null;
this.byName = null;
}
}
/**
* Open our helper page in a tab in its own content process, asserting that it
* really is in its own process. We initially load and wait for about:blank to
* load, and only then loadURI to our actual page. This is to ensure that
* LocalStorageManager has had an opportunity to be created and populate
* mOriginsHavingData.
*
* (nsGlobalWindow will reliably create LocalStorageManager as a side-effect of
* the unconditional call to nsGlobalWindow::PreloadLocalStorage. This will
* reliably create the StorageDBChild instance, and its corresponding
* StorageDBParent will send the set of origins when it is constructed.)
*/
async function openTestTab(
helperPageUrl,
name,
knownTabs,
shouldLoadInNewProcess
) {
let realUrl = helperPageUrl + "?" + encodeURIComponent(name);
// Load and wait for about:blank.
let tab = await BrowserTestUtils.openNewForegroundTab({
gBrowser,
opening: "about:blank",
forceNewProcess: true,
});
ok(!knownTabs.byName.has(name), "tab needs its own name: " + name);
let knownTab = new KnownTab(name, tab);
knownTabs.byName.set(name, knownTab);
// Now trigger the actual load of our page.
BrowserTestUtils.startLoadingURIString(tab.linkedBrowser, realUrl);
await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
let pid = tab.linkedBrowser.frameLoader.remoteTab.osPid;
if (shouldLoadInNewProcess) {
ok(
!knownTabs.byPid.has(pid),
"tab should be loaded in new process, pid: " + pid
);
} else {
ok(
knownTabs.byPid.has(pid),
"tab should be loaded in the same process, new pid: " + pid
);
}
if (knownTabs.byPid.has(pid)) {
knownTabs.byPid.get(pid).set(name, knownTab);
} else {
let pidMap = new Map();
pidMap.set(name, knownTab);
knownTabs.byPid.set(pid, pidMap);
}
return knownTab;
}
/**
* Close all the tabs we opened.
*/
async function cleanupTabs(knownTabs) {
for (let knownTab of knownTabs.byName.values()) {
BrowserTestUtils.removeTab(knownTab.tab);
knownTab.cleanup();
}
knownTabs.cleanup();
}
/**
* Wait for a LocalStorage flush to occur. This notification can occur as a
* result of any of:
* - The normal, hardcoded 5-second flush timer.
* - InsertDBOp seeing a preload op for an origin with outstanding changes.
* - Us generating a "domstorage-test-flush-force" observer notification.
*/
function waitForLocalStorageFlush() {
if (Services.domStorageManager.nextGenLocalStorageEnabled) {
return new Promise(resolve => executeSoon(resolve));
}
return new Promise(function (resolve) {
let observer = {
observe() {
SpecialPowers.removeObserver(observer, "domstorage-test-flushed");
resolve();
},
};
SpecialPowers.addObserver(observer, "domstorage-test-flushed");
});
}
/**
* Trigger and wait for a flush. This is only necessary for forcing
* mOriginsHavingData to be updated. Normal operations exposed to content know
* to automatically flush when necessary for correctness.
*
* The notification we're waiting for to verify flushing is fundamentally
* ambiguous (see waitForLocalStorageFlush), so we actually trigger the flush
* twice and wait twice. In the event there was a race, there will be 3 flush
* notifications, but correctness is guaranteed after the second notification.
*/
function triggerAndWaitForLocalStorageFlush() {
if (Services.domStorageManager.nextGenLocalStorageEnabled) {
return new Promise(resolve => executeSoon(resolve));
}
SpecialPowers.notifyObservers(null, "domstorage-test-flush-force");
// This first wait is ambiguous...
return waitForLocalStorageFlush().then(function () {
// So issue a second flush and wait for that.
SpecialPowers.notifyObservers(null, "domstorage-test-flush-force");
return waitForLocalStorageFlush();
});
}
/**
* Clear the origin's storage so that "OriginsHavingData" will return false for
* our origin. Note that this is only the case for AsyncClear() which is
* explicitly issued against a cache, or AsyncClearAll() which we can trigger
* by wiping all storage. However, the more targeted domain clearings that
* we can trigger via observer, AsyncClearMatchingOrigin and
* AsyncClearMatchingOriginAttributes will not clear the hashtable entry for
* the origin.
*
* So we explicitly access the cache here in the parent for the origin and issue
* an explicit clear. Clearing all storage might be a little easier but seems
* like asking for intermittent failures.
*/
function clearOriginStorageEnsuringNoPreload(origin) {
let principal =
Services.scriptSecurityManager.createContentPrincipalFromOrigin(origin);
if (Services.domStorageManager.nextGenLocalStorageEnabled) {
let request = Services.qms.clearStoragesForPrincipal(
principal,
"default",
"ls"
);
let promise = new Promise(resolve => {
request.callback = () => {
resolve();
};
});
return promise;
}
// We want to use createStorage to force the cache to be created so we can
// issue the clear. It's possible for getStorage to return false but for the
// origin preload hash to still have our origin in it.
let storage = Services.domStorageManager.createStorage(
null,
principal,
principal,
""
);
storage.clear();
// We also need to trigger a flush os that mOriginsHavingData gets updated.
// The inherent flush race is fine here because
return triggerAndWaitForLocalStorageFlush();
}
async function verifyTabPreload(knownTab, expectStorageExists, origin) {
let storageExists = await SpecialPowers.spawn(
knownTab.tab.linkedBrowser,
[origin],
function (origin) {
let principal =
Services.scriptSecurityManager.createContentPrincipalFromOrigin(origin);
if (Services.domStorageManager.nextGenLocalStorageEnabled) {
return Services.domStorageManager.isPreloaded(principal);
}
return !!Services.domStorageManager.getStorage(
null,
principal,
principal
);
}
);
is(storageExists, expectStorageExists, "Storage existence === preload");
}
/**
* Instruct the given tab to execute the given series of mutations. For
* simplicity, the mutations representation matches the expected events rep.
*/
async function mutateTabStorage(knownTab, mutations, sentinelValue) {
await SpecialPowers.spawn(
knownTab.tab.linkedBrowser,
[{ mutations, sentinelValue }],
function (args) {
return content.wrappedJSObject.mutateStorage(Cu.cloneInto(args, content));
}
);
}
/**
* Instruct the given tab to add a "storage" event listener and record all
* received events. verifyTabStorageEvents is the corresponding method to
* check and assert the recorded events.
*/
async function recordTabStorageEvents(knownTab, sentinelValue) {
await SpecialPowers.spawn(
knownTab.tab.linkedBrowser,
[sentinelValue],
function (sentinelValue) {
return content.wrappedJSObject.listenForStorageEvents(sentinelValue);
}
);
}
/**
* Retrieve the current localStorage contents perceived by the tab and assert
* that they match the provided expected state.
*
* If maybeSentinel is non-null, it's assumed to be a string that identifies the
* value we should be waiting for the sentinel key to take on. This is
* necessary because we cannot make any assumptions about when state will be
* propagated to the given process. See the comments in
* page_localstorage_e10s.js for more context. In general, a sentinel value is
* required for correctness unless the process in question is the one where the
* writes were performed or verifyTabStorageEvents was used.
*/
async function verifyTabStorageState(knownTab, expectedState, maybeSentinel) {
let actualState = await SpecialPowers.spawn(
knownTab.tab.linkedBrowser,
[maybeSentinel],
function (maybeSentinel) {
return content.wrappedJSObject.getStorageState(maybeSentinel);
}
);
for (let [expectedKey, expectedValue] of Object.entries(expectedState)) {
ok(actualState.hasOwnProperty(expectedKey), "key present: " + expectedKey);
is(actualState[expectedKey], expectedValue, "value correct");
}
for (let actualKey of Object.keys(actualState)) {
if (!expectedState.hasOwnProperty(actualKey)) {
ok(false, "actual state has key it shouldn't have: " + actualKey);
}
}
}
/**
* Retrieve and clear the storage events recorded by the tab and assert that
* they match the provided expected events. For simplicity, the expected events
* representation is the same as that used by mutateTabStorage.
*
* Note that by convention for test readability we are passed a 3rd argument of
* the sentinel value, but we don't actually care what it is.
*/
async function verifyTabStorageEvents(knownTab, expectedEvents) {
let actualEvents = await SpecialPowers.spawn(
knownTab.tab.linkedBrowser,
[],
function () {
return content.wrappedJSObject.returnAndClearStorageEvents();
}
);
is(actualEvents.length, expectedEvents.length, "right number of events");
for (let i = 0; i < actualEvents.length; i++) {
let [actualKey, actualNewValue, actualOldValue] = actualEvents[i];
let [expectedKey, expectedNewValue, expectedOldValue] = expectedEvents[i];
is(actualKey, expectedKey, "keys match");
is(actualNewValue, expectedNewValue, "new values match");
is(actualOldValue, expectedOldValue, "old values match");
}
}