Add persistence migration tests. (#4631)

* Add persistence tests and fix some issues.

* Address review feedback.

* Enable strict mode and remove module prop hacks.

* Add persistence migration tests.

* Use driver.getUserSnapshot().

* Remove unused imports.

packages-exp/auth-exp/test/helpers/integration/emulator_rest_helpers.ts

@@ -77,6 +77,22 @@ export async function resetEmulator(): Promise<void> {
   await FetchProvider.fetch()(url, { method: 'DELETE' });
 }
 
+export async function createAnonAccount(): Promise<{
+  localId: string;
+  idToken: string;
+  refreshToken: string;
+}> {
+  const url = `${getEmulatorUrl()}/identitytoolkit.googleapis.com/v1/accounts:signUp?key=fake-key`;
+  const response = await (
+    await FetchProvider.fetch()(url, {
+      method: 'POST',
+      body: '{}',
+      headers: { 'Content-Type': 'application/json' }
+    })
+  ).json();
+  return response;
+}
+
 function buildEmulatorUrlForPath(endpoint: string): string {
   const emulatorBaseUrl = getEmulatorUrl();
   const projectId = getAppConfig().projectId;

packages-exp/auth-exp/test/integration/webdriver/persistence.test.ts

@@ -18,11 +18,31 @@
 // eslint-disable-next-line import/no-extraneous-dependencies
 import { UserCredential } from '@firebase/auth-exp';
 import { expect } from 'chai';
+import { createAnonAccount } from '../../helpers/integration/emulator_rest_helpers';
 import { API_KEY } from '../../helpers/integration/settings';
 import { AnonFunction, PersistenceFunction } from './util/functions';
 import { browserDescribe } from './util/test_runner';
 
+// eslint-disable-next-line @typescript-eslint/explicit-function-return-type
+async function testPersistedUser() {
+  const account = await createAnonAccount();
+  return {
+    uid: account.localId,
+    emailVerified: false,
+    isAnonymous: true,
+    providerData: [],
+    stsTokenManager: {
+      refreshToken: account.refreshToken,
+      accessToken: account.idToken,
+      expirationTime: Date.now() + 3600 * 1000
+    },
+    createdAt: Date.now().toString(),
+    lastLoginAt: Date.now().toString()
+  };
+}
+
 browserDescribe('WebDriver persistence test', driver => {
+  const fullPersistenceKey = `firebase:authUser:${API_KEY}:[DEFAULT]`;
   context('default persistence hierarchy (indexedDB > localStorage)', () => {
     it('stores user in indexedDB by default', async () => {
       const cred: UserCredential = await driver.call(
@@ -39,9 +59,7 @@ browserDescribe('WebDriver persistence test', driver => {
       ).to.eql({});
 
       const snap = await driver.call(PersistenceFunction.INDEXED_DB_SNAP);
-      expect(snap)
-        .to.have.property(`firebase:authUser:${API_KEY}:[DEFAULT]`)
-        .that.contains({ uid });
+      expect(snap).to.have.property(fullPersistenceKey).that.contains({ uid });
 
       // Persistence should survive a refresh:
       await driver.webDriver.navigate().refresh();
@@ -71,9 +89,7 @@ browserDescribe('WebDriver persistence test', driver => {
       ).to.eql({});
 
       const snap = await driver.call(PersistenceFunction.INDEXED_DB_SNAP);
-      expect(snap)
-        .to.have.property(`firebase:authUser:${API_KEY}:[DEFAULT]`)
-        .that.contains({ uid });
+      expect(snap).to.have.property(fullPersistenceKey).that.contains({ uid });
 
       // Persistence should survive a refresh:
       await driver.webDriver.navigate().refresh();
@@ -100,9 +116,7 @@ browserDescribe('WebDriver persistence test', driver => {
       ).to.eql({});
 
       const snap = await driver.call(PersistenceFunction.LOCAL_STORAGE_SNAP);
-      expect(snap)
-        .to.have.property(`firebase:authUser:${API_KEY}:[DEFAULT]`)
-        .that.contains({ uid });
+      expect(snap).to.have.property(fullPersistenceKey).that.contains({ uid });
 
       // Persistence should survive a refresh:
       await driver.webDriver.navigate().refresh();
@@ -139,9 +153,84 @@ browserDescribe('WebDriver persistence test', driver => {
       await driver.waitForAuthInit();
       expect(await driver.getUserSnapshot()).to.equal(null);
     });
-  });
 
-  // TODO: Upgrade tests (e.g. migrate user from localStorage to indexedDB).
+    it('migrate stored user from localStorage if indexedDB is available', async () => {
+      const persistedUser = await testPersistedUser();
+      await driver.webDriver.navigate().refresh();
+      await driver.call(PersistenceFunction.LOCAL_STORAGE_SET, {
+        [fullPersistenceKey]: persistedUser
+      });
+      await driver.injectConfigAndInitAuth();
+      await driver.waitForAuthInit();
+
+      // User from localStorage should be picked up.
+      const user = await driver.getUserSnapshot();
+      expect(user.uid).eql(persistedUser.uid);
+
+      // User should be migrated to indexedDB, and the key in localStorage should be deleted.
+      const snap = await driver.call(PersistenceFunction.INDEXED_DB_SNAP);
+      expect(snap)
+        .to.have.property(fullPersistenceKey)
+        .that.contains({ uid: persistedUser.uid });
+      expect(await driver.call(PersistenceFunction.LOCAL_STORAGE_SNAP)).to.eql(
+        {}
+      );
+    });
+
+    it('migrate stored user to localStorage if indexedDB is readonly', async () => {
+      // Sign in first, which gets persisted in indexedDB.
+      const cred: UserCredential = await driver.call(
+        AnonFunction.SIGN_IN_ANONYMOUSLY
+      );
+      const uid = cred.user.uid;
+
+      await driver.webDriver.navigate().refresh();
+      await driver.call(PersistenceFunction.MAKE_INDEXED_DB_READONLY);
+      await driver.injectConfigAndInitAuth();
+      await driver.waitForAuthInit();
+
+      // User from indexedDB should be picked up.
+      const user = await driver.getUserSnapshot();
+      expect(user.uid).eql(uid);
+
+      // User should be migrated to localStorage, and the key in indexedDB should be deleted.
+      const snap = await driver.call(PersistenceFunction.LOCAL_STORAGE_SNAP);
+      expect(snap).to.have.property(fullPersistenceKey).that.contains({ uid });
+      expect(await driver.call(PersistenceFunction.INDEXED_DB_SNAP)).to.eql({});
+    });
+
+    it('use in-memory and clear all persistences if indexedDB and localStorage are both broken', async () => {
+      const persistedUser = await testPersistedUser();
+      await driver.webDriver.navigate().refresh();
+      await driver.call(PersistenceFunction.LOCAL_STORAGE_SET, {
+        [fullPersistenceKey]: persistedUser
+      });
+      // Simulate browsers that do not support indexedDB.
+      await driver.webDriver.executeScript('delete window.indexedDB;');
+      // Simulate browsers denying writes to localStorage (e.g. Safari private browsing).
+      await driver.webDriver.executeScript(
+        'Storage.prototype.setItem = () => { throw new Error("setItem disabled for testing"); };'
+      );
+      await driver.injectConfigAndInitAuth();
+      await driver.waitForAuthInit();
+
+      // User from localStorage should be picked up.
+      const user = await driver.getUserSnapshot();
+      expect(user.uid).eql(persistedUser.uid);
+
+      // Both storage should be cleared.
+      expect(await driver.call(PersistenceFunction.LOCAL_STORAGE_SNAP)).to.eql(
+        {}
+      );
+      expect(await driver.call(PersistenceFunction.INDEXED_DB_SNAP)).to.eql({});
+
+      // User will be gone (a.k.a. logged out) after refresh.
+      await driver.webDriver.navigate().refresh();
+      await driver.injectConfigAndInitAuth();
+      await driver.waitForAuthInit();
+      expect(await driver.getUserSnapshot()).to.equal(null);
+    });
+  });
 
   // TODO: Compatibility tests (e.g. sign in with JS SDK and should stay logged in with TS SDK).
 });

packages-exp/auth-exp/test/integration/webdriver/static/persistence.js

@@ -33,9 +33,15 @@ export async function clearPersistence() {
 export async function localStorageSnap() {
   return dumpStorage(localStorage);
 }
+export async function localStorageSet(dict) {
+  setInStorage(localStorage, dict);
+}
 export async function sessionStorageSnap() {
   return dumpStorage(sessionStorage);
 }
+export async function sessionStorageSet(dict) {
+  setInStorage(sessionStorage, dict);
+}
 
 const DB_OBJECTSTORE_NAME = 'firebaseLocalStorage';
 
@@ -58,6 +64,21 @@ export async function indexedDBSnap() {
   return result;
 }
 
+// Mock functions for testing edge cases
+export async function makeIndexedDBReadonly() {
+  IDBObjectStore.prototype.add = IDBObjectStore.prototype.put = () => {
+    return {
+      error: 'add/put is disabled for test purposes',
+      readyState: 'done',
+      addEventListener(event, listener) {
+        if (event === 'error') {
+          void Promise.resolve({}).then(listener);
+        }
+      }
+    };
+  };
+}
+
 function dumpStorage(storage) {
   const result = {};
   for (let i = 0; i < storage.length; i++) {
@@ -67,6 +88,16 @@ function dumpStorage(storage) {
   return result;
 }
 
+function setInStorage(storage, dict) {
+  for (const [key, value] of Object.entries(dict)) {
+    if (value === undefined) {
+      storage.removeItem(key);
+    } else {
+      storage.setItem(key, JSON.stringify(value));
+    }
+  }
+}
+
 function dbPromise(dbRequest) {
   return new Promise((resolve, reject) => {
     dbRequest.addEventListener('success', () => {

packages-exp/auth-exp/test/integration/webdriver/util/auth_driver.ts

@@ -52,6 +52,23 @@ export class AuthDriver {
 
   async stop(): Promise<void> {
     authTestServer.stop();
+    if (process.env.WEBDRIVER_BROWSER_LOGS) {
+      await this.webDriver
+        .manage()
+        .logs()
+        .get('browser')
+        .then(
+          logs => {
+            for (const { level, message } of logs) {
+              console.log(level.name, message);
+            }
+          },
+          () =>
+            console.log(
+              'Failed to dump browser logs (this is normal for Firefox).'
+            )
+        );
+    }
     await this.webDriver.quit();
   }
 

packages-exp/auth-exp/test/integration/webdriver/util/functions.ts

@@ -64,6 +64,9 @@ export enum CoreFunction {
 export enum PersistenceFunction {
   CLEAR_PERSISTENCE = 'persistence.clearPersistence',
   LOCAL_STORAGE_SNAP = 'persistence.localStorageSnap',
+  LOCAL_STORAGE_SET = 'persistence.localStorageSet',
   SESSION_STORAGE_SNAP = 'persistence.sessionStorageSnap',
-  INDEXED_DB_SNAP = 'persistence.indexedDBSnap'
+  SESSION_STORAGE_SET = 'persistence.sessionStorageSet',
+  INDEXED_DB_SNAP = 'persistence.indexedDBSnap',
+  MAKE_INDEXED_DB_READONLY = 'persistence.makeIndexedDBReadonly'
 }