4 files changed, 608 insertions, 0 deletions
diff --git a/services/sync/modules-testing/fakeservices.sys.mjs b/services/sync/modules-testing/fakeservices.sys.mjs
new file mode 100644
index 0000000000..4fd7534bf1
--- /dev/null
+++ b/services/sync/modules-testing/fakeservices.sys.mjs
@@ -0,0 +1,114 @@
+/* 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 file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { Weave } from "resource://services-sync/main.sys.mjs";
+import { RawCryptoWrapper } from "resource://services-sync/record.sys.mjs";
+import { Utils } from "resource://services-sync/util.sys.mjs";
+
+export function FakeFilesystemService(contents) {
+  this.fakeContents = contents;
+  let self = this;
+
+  // Save away the unmocked versions of the functions we replace here for tests
+  // that really want the originals. As this may be called many times per test,
+  // we must be careful to not replace them with ones we previously replaced.
+  // (And why are we bothering with these mocks in the first place? Is the
+  // performance of the filesystem *really* such that it outweighs the downside
+  // of not running our real JSON functions in the tests? Eg, these mocks don't
+  // always throw exceptions when the real ones do. Anyway...)
+  for (let name of ["jsonSave", "jsonLoad", "jsonMove", "jsonRemove"]) {
+    let origName = "_real_" + name;
+    if (!Utils[origName]) {
+      Utils[origName] = Utils[name];
+    }
+  }
+
+  Utils.jsonSave = async function jsonSave(filePath, that, obj) {
+    let json = typeof obj == "function" ? obj.call(that) : obj;
+    self.fakeContents["weave/" + filePath + ".json"] = JSON.stringify(json);
+  };
+
+  Utils.jsonLoad = async function jsonLoad(filePath, that) {
+    let obj;
+    let json = self.fakeContents["weave/" + filePath + ".json"];
+    if (json) {
+      obj = JSON.parse(json);
+    }
+    return obj;
+  };
+
+  Utils.jsonMove = function jsonMove(aFrom, aTo, that) {
+    const fromPath = "weave/" + aFrom + ".json";
+    self.fakeContents["weave/" + aTo + ".json"] = self.fakeContents[fromPath];
+    delete self.fakeContents[fromPath];
+    return Promise.resolve();
+  };
+
+  Utils.jsonRemove = function jsonRemove(filePath, that) {
+    delete self.fakeContents["weave/" + filePath + ".json"];
+    return Promise.resolve();
+  };
+}
+
+export function fakeSHA256HMAC(message) {
+  message = message.substr(0, 64);
+  while (message.length < 64) {
+    message += " ";
+  }
+  return message;
+}
+
+export function FakeGUIDService() {
+  let latestGUID = 0;
+
+  Utils.makeGUID = function makeGUID() {
+    // ensure that this always returns a unique 12 character string
+    let nextGUID = "fake-guid-" + String(latestGUID++).padStart(2, "0");
+    return nextGUID.slice(nextGUID.length - 12, nextGUID.length);
+  };
+}
+
+/*
+ * Mock implementation of WeaveCrypto. It does not encrypt or
+ * decrypt, merely returning the input verbatim.
+ */
+export function FakeCryptoService() {
+  this.counter = 0;
+
+  delete Weave.Crypto; // get rid of the getter first
+  Weave.Crypto = this;
+
+  RawCryptoWrapper.prototype.ciphertextHMAC = function ciphertextHMAC(
+    keyBundle
+  ) {
+    return fakeSHA256HMAC(this.ciphertext);
+  };
+}
+
+FakeCryptoService.prototype = {
+  async encrypt(clearText, symmetricKey, iv) {
+    return clearText;
+  },
+
+  async decrypt(cipherText, symmetricKey, iv) {
+    return cipherText;
+  },
+
+  async generateRandomKey() {
+    return btoa("fake-symmetric-key-" + this.counter++);
+  },
+
+  generateRandomIV: function generateRandomIV() {
+    // A base64-encoded IV is 24 characters long
+    return btoa("fake-fake-fake-random-iv");
+  },
+
+  expandData: function expandData(data, len) {
+    return data;
+  },
+
+  generateRandomBytes: function generateRandomBytes(byteCount) {
+    return "not-so-random-now-are-we-HA-HA-HA! >:)".slice(byteCount);
+  },
+};
diff --git a/services/sync/modules-testing/fxa_utils.sys.mjs b/services/sync/modules-testing/fxa_utils.sys.mjs
new file mode 100644
index 0000000000..c953f0eaa3
--- /dev/null
+++ b/services/sync/modules-testing/fxa_utils.sys.mjs
@@ -0,0 +1,55 @@
+/* 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
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { Log } from "resource://gre/modules/Log.sys.mjs";
+
+import { Weave } from "resource://services-sync/main.sys.mjs";
+import { SyncAuthManager } from "resource://services-sync/sync_auth.sys.mjs";
+
+import { TokenServerClient } from "resource://services-common/tokenserverclient.sys.mjs";
+import { configureFxAccountIdentity } from "resource://testing-common/services/sync/utils.sys.mjs";
+
+// Create a new sync_auth object and initialize it with a
+// mocked TokenServerClient which always receives the specified response.
+export var initializeIdentityWithTokenServerResponse = function (response) {
+  // First create a mock "request" object that well' hack into the token server.
+  // A log for it
+  let requestLog = Log.repository.getLogger("testing.mock-rest");
+  if (!requestLog.appenders.length) {
+    // might as well see what it says :)
+    requestLog.addAppender(new Log.DumpAppender());
+    requestLog.level = Log.Level.Trace;
+  }
+
+  // A mock request object.
+  function MockRESTRequest(url) {}
+  MockRESTRequest.prototype = {
+    _log: requestLog,
+    setHeader() {},
+    async get() {
+      this.response = response;
+      return response;
+    },
+  };
+  // The mocked TokenServer client which will get the response.
+  function MockTSC() {}
+  MockTSC.prototype = new TokenServerClient();
+  MockTSC.prototype.constructor = MockTSC;
+  MockTSC.prototype.newRESTRequest = function (url) {
+    return new MockRESTRequest(url);
+  };
+  // Arrange for the same observerPrefix as sync_auth uses.
+  MockTSC.prototype.observerPrefix = "weave:service";
+
+  // tie it all together.
+  Weave.Status.__authManager = Weave.Service.identity = new SyncAuthManager();
+  let syncAuthManager = Weave.Service.identity;
+  // a sanity check
+  if (!(syncAuthManager instanceof SyncAuthManager)) {
+    throw new Error("sync isn't configured to use sync_auth");
+  }
+  let mockTSC = new MockTSC();
+  configureFxAccountIdentity(syncAuthManager);
+  syncAuthManager._tokenServerClient = mockTSC;
+};
diff --git a/services/sync/modules-testing/rotaryengine.sys.mjs b/services/sync/modules-testing/rotaryengine.sys.mjs
new file mode 100644
index 0000000000..d7f2165e4d
--- /dev/null
+++ b/services/sync/modules-testing/rotaryengine.sys.mjs
@@ -0,0 +1,120 @@
+/* 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 file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import {
+  Store,
+  SyncEngine,
+  LegacyTracker,
+} from "resource://services-sync/engines.sys.mjs";
+
+import { CryptoWrapper } from "resource://services-sync/record.sys.mjs";
+import { SerializableSet, Utils } from "resource://services-sync/util.sys.mjs";
+
+/*
+ * A fake engine implementation.
+ * This is used all over the place.
+ *
+ * Complete with record, store, and tracker implementations.
+ */
+
+export function RotaryRecord(collection, id) {
+  CryptoWrapper.call(this, collection, id);
+}
+
+RotaryRecord.prototype = {};
+Object.setPrototypeOf(RotaryRecord.prototype, CryptoWrapper.prototype);
+Utils.deferGetSet(RotaryRecord, "cleartext", ["denomination"]);
+
+export function RotaryStore(name, engine) {
+  Store.call(this, name, engine);
+  this.items = {};
+}
+
+RotaryStore.prototype = {
+  async create(record) {
+    this.items[record.id] = record.denomination;
+  },
+
+  async remove(record) {
+    delete this.items[record.id];
+  },
+
+  async update(record) {
+    this.items[record.id] = record.denomination;
+  },
+
+  async itemExists(id) {
+    return id in this.items;
+  },
+
+  async createRecord(id, collection) {
+    let record = new RotaryRecord(collection, id);
+
+    if (!(id in this.items)) {
+      record.deleted = true;
+      return record;
+    }
+
+    record.denomination = this.items[id] || "Data for new record: " + id;
+    return record;
+  },
+
+  async changeItemID(oldID, newID) {
+    if (oldID in this.items) {
+      this.items[newID] = this.items[oldID];
+    }
+
+    delete this.items[oldID];
+  },
+
+  async getAllIDs() {
+    let ids = {};
+    for (let id in this.items) {
+      ids[id] = true;
+    }
+    return ids;
+  },
+
+  async wipe() {
+    this.items = {};
+  },
+};
+
+Object.setPrototypeOf(RotaryStore.prototype, Store.prototype);
+
+export function RotaryTracker(name, engine) {
+  LegacyTracker.call(this, name, engine);
+}
+
+RotaryTracker.prototype = {};
+Object.setPrototypeOf(RotaryTracker.prototype, LegacyTracker.prototype);
+
+export function RotaryEngine(service) {
+  SyncEngine.call(this, "Rotary", service);
+  // Ensure that the engine starts with a clean slate.
+  this.toFetch = new SerializableSet();
+  this.previousFailed = new SerializableSet();
+}
+
+RotaryEngine.prototype = {
+  _storeObj: RotaryStore,
+  _trackerObj: RotaryTracker,
+  _recordObj: RotaryRecord,
+
+  async _findDupe(item) {
+    // This is a Special Value® used for testing proper reconciling on dupe
+    // detection.
+    if (item.id == "DUPE_INCOMING") {
+      return "DUPE_LOCAL";
+    }
+
+    for (let [id, value] of Object.entries(this._store.items)) {
+      if (item.denomination == value) {
+        return id;
+      }
+    }
+    return null;
+  },
+};
+Object.setPrototypeOf(RotaryEngine.prototype, SyncEngine.prototype);
diff --git a/services/sync/modules-testing/utils.sys.mjs b/services/sync/modules-testing/utils.sys.mjs
new file mode 100644
index 0000000000..498bf9872a
--- /dev/null
+++ b/services/sync/modules-testing/utils.sys.mjs
@@ -0,0 +1,319 @@
+/* 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 file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { CommonUtils } from "resource://services-common/utils.sys.mjs";
+
+import { Assert } from "resource://testing-common/Assert.sys.mjs";
+
+import { initTestLogging } from "resource://testing-common/services/common/logging.sys.mjs";
+import {
+  FakeCryptoService,
+  FakeFilesystemService,
+  FakeGUIDService,
+  fakeSHA256HMAC,
+} from "resource://testing-common/services/sync/fakeservices.sys.mjs";
+
+import {
+  FxAccounts,
+  AccountState,
+} from "resource://gre/modules/FxAccounts.sys.mjs";
+import { FxAccountsClient } from "resource://gre/modules/FxAccountsClient.sys.mjs";
+
+import { SCOPE_OLD_SYNC } from "resource://gre/modules/FxAccountsCommon.sys.mjs";
+
+// A mock "storage manager" for FxAccounts that doesn't actually write anywhere.
+export function MockFxaStorageManager() {}
+
+MockFxaStorageManager.prototype = {
+  promiseInitialized: Promise.resolve(),
+
+  initialize(accountData) {
+    this.accountData = accountData;
+  },
+
+  finalize() {
+    return Promise.resolve();
+  },
+
+  getAccountData(fields = null) {
+    let result;
+    if (!this.accountData) {
+      result = null;
+    } else if (fields == null) {
+      // can't use cloneInto as the keys get upset...
+      result = {};
+      for (let field of Object.keys(this.accountData)) {
+        result[field] = this.accountData[field];
+      }
+    } else {
+      if (!Array.isArray(fields)) {
+        fields = [fields];
+      }
+      result = {};
+      for (let field of fields) {
+        result[field] = this.accountData[field];
+      }
+    }
+    return Promise.resolve(result);
+  },
+
+  updateAccountData(updatedFields) {
+    for (let [name, value] of Object.entries(updatedFields)) {
+      if (value == null) {
+        delete this.accountData[name];
+      } else {
+        this.accountData[name] = value;
+      }
+    }
+    return Promise.resolve();
+  },
+
+  deleteAccountData() {
+    this.accountData = null;
+    return Promise.resolve();
+  },
+};
+
+/**
+ * First wait >100ms (nsITimers can take up to that much time to fire, so
+ * we can account for the timer in delayedAutoconnect) and then two event
+ * loop ticks (to account for the CommonUtils.nextTick() in autoConnect).
+ */
+export function waitForZeroTimer(callback) {
+  let ticks = 2;
+  function wait() {
+    if (ticks) {
+      ticks -= 1;
+      CommonUtils.nextTick(wait);
+      return;
+    }
+    callback();
+  }
+  CommonUtils.namedTimer(wait, 150, {}, "timer");
+}
+
+export var promiseZeroTimer = function () {
+  return new Promise(resolve => {
+    waitForZeroTimer(resolve);
+  });
+};
+
+export var promiseNamedTimer = function (wait, thisObj, name) {
+  return new Promise(resolve => {
+    CommonUtils.namedTimer(resolve, wait, thisObj, name);
+  });
+};
+
+// Return an identity configuration suitable for testing with our identity
+// providers.  |overrides| can specify overrides for any default values.
+// |server| is optional, but if specified, will be used to form the cluster
+// URL for the FxA identity.
+export var makeIdentityConfig = function (overrides) {
+  // first setup the defaults.
+  let result = {
+    // Username used in both fxaccount and sync identity configs.
+    username: "foo",
+    // fxaccount specific credentials.
+    fxaccount: {
+      user: {
+        email: "foo",
+        scopedKeys: {
+          [SCOPE_OLD_SYNC]: {
+            kid: "1234567890123-u7u7u7u7u7u7u7u7u7u7uw",
+            k: "qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqg",
+            kty: "oct",
+          },
+        },
+        sessionToken: "sessionToken",
+        uid: "a".repeat(32),
+        verified: true,
+      },
+      token: {
+        endpoint: null,
+        duration: 300,
+        id: "id",
+        key: "key",
+        hashed_fxa_uid: "f".repeat(32), // used during telemetry validation
+        // uid will be set to the username.
+      },
+    },
+  };
+
+  // Now handle any specified overrides.
+  if (overrides) {
+    if (overrides.username) {
+      result.username = overrides.username;
+    }
+    if (overrides.fxaccount) {
+      // TODO: allow just some attributes to be specified
+      result.fxaccount = overrides.fxaccount;
+    }
+    if (overrides.node_type) {
+      result.fxaccount.token.node_type = overrides.node_type;
+    }
+  }
+  return result;
+};
+
+export var makeFxAccountsInternalMock = function (config) {
+  return {
+    newAccountState(credentials) {
+      // We only expect this to be called with null indicating the (mock)
+      // storage should be read.
+      if (credentials) {
+        throw new Error("Not expecting to have credentials passed");
+      }
+      let storageManager = new MockFxaStorageManager();
+      storageManager.initialize(config.fxaccount.user);
+      let accountState = new AccountState(storageManager);
+      return accountState;
+    },
+    getOAuthToken: () => Promise.resolve("some-access-token"),
+    destroyOAuthToken: () => Promise.resolve(),
+    keys: {
+      getScopedKeys: () =>
+        Promise.resolve({
+          "https://identity.mozilla.com/apps/oldsync": {
+            identifier: "https://identity.mozilla.com/apps/oldsync",
+            keyRotationSecret:
+              "0000000000000000000000000000000000000000000000000000000000000000",
+            keyRotationTimestamp: 1510726317123,
+          },
+        }),
+    },
+    profile: {
+      getProfile() {
+        return null;
+      },
+    },
+  };
+};
+
+// Configure an instance of an FxAccount identity provider with the specified
+// config (or the default config if not specified).
+export var configureFxAccountIdentity = function (
+  authService,
+  config = makeIdentityConfig(),
+  fxaInternal = makeFxAccountsInternalMock(config)
+) {
+  // until we get better test infrastructure for bid_identity, we set the
+  // signedin user's "email" to the username, simply as many tests rely on this.
+  config.fxaccount.user.email = config.username;
+
+  let fxa = new FxAccounts(fxaInternal);
+
+  let MockFxAccountsClient = function () {
+    FxAccountsClient.apply(this);
+  };
+  MockFxAccountsClient.prototype = {
+    accountStatus() {
+      return Promise.resolve(true);
+    },
+  };
+  Object.setPrototypeOf(
+    MockFxAccountsClient.prototype,
+    FxAccountsClient.prototype
+  );
+  let mockFxAClient = new MockFxAccountsClient();
+  fxa._internal._fxAccountsClient = mockFxAClient;
+
+  let mockTSC = {
+    // TokenServerClient
+    async getTokenUsingOAuth(url, oauthToken) {
+      Assert.equal(
+        url,
+        Services.prefs.getStringPref("identity.sync.tokenserver.uri")
+      );
+      Assert.ok(oauthToken, "oauth token present");
+      config.fxaccount.token.uid = config.username;
+      return config.fxaccount.token;
+    },
+  };
+  authService._fxaService = fxa;
+  authService._tokenServerClient = mockTSC;
+  // Set the "account" of the sync auth manager to be the "email" of the
+  // logged in user of the mockFXA service.
+  authService._signedInUser = config.fxaccount.user;
+  authService._account = config.fxaccount.user.email;
+};
+
+export var configureIdentity = async function (identityOverrides, server) {
+  let config = makeIdentityConfig(identityOverrides, server);
+  // Must be imported after the identity configuration is set up.
+  let { Service } = ChromeUtils.importESModule(
+    "resource://services-sync/service.sys.mjs"
+  );
+
+  // If a server was specified, ensure FxA has a correct cluster URL available.
+  if (server && !config.fxaccount.token.endpoint) {
+    let ep = server.baseURI;
+    if (!ep.endsWith("/")) {
+      ep += "/";
+    }
+    ep += "1.1/" + config.username + "/";
+    config.fxaccount.token.endpoint = ep;
+  }
+
+  configureFxAccountIdentity(Service.identity, config);
+  Services.prefs.setStringPref("services.sync.username", config.username);
+  // many of these tests assume all the auth stuff is setup and don't hit
+  // a path which causes that auth to magically happen - so do it now.
+  await Service.identity._ensureValidToken();
+
+  // and cheat to avoid requiring each test do an explicit login - give it
+  // a cluster URL.
+  if (config.fxaccount.token.endpoint) {
+    Service.clusterURL = config.fxaccount.token.endpoint;
+  }
+};
+
+export function syncTestLogging(level = "Trace") {
+  let logStats = initTestLogging(level);
+  Services.prefs.setStringPref("services.sync.log.logger", level);
+  Services.prefs.setStringPref("services.sync.log.logger.engine", "");
+  return logStats;
+}
+
+export var SyncTestingInfrastructure = async function (server, username) {
+  let config = makeIdentityConfig({ username });
+  await configureIdentity(config, server);
+  return {
+    logStats: syncTestLogging(),
+    fakeFilesystem: new FakeFilesystemService({}),
+    fakeGUIDService: new FakeGUIDService(),
+    fakeCryptoService: new FakeCryptoService(),
+  };
+};
+
+/**
+ * Turn WBO cleartext into fake "encrypted" payload as it goes over the wire.
+ */
+export function encryptPayload(cleartext) {
+  if (typeof cleartext == "object") {
+    cleartext = JSON.stringify(cleartext);
+  }
+
+  return {
+    ciphertext: cleartext, // ciphertext == cleartext with fake crypto
+    IV: "irrelevant",
+    hmac: fakeSHA256HMAC(cleartext),
+  };
+}
+
+export var sumHistogram = function (name, options = {}) {
+  let histogram = options.key
+    ? Services.telemetry.getKeyedHistogramById(name)
+    : Services.telemetry.getHistogramById(name);
+  let snapshot = histogram.snapshot();
+  let sum = -Infinity;
+  if (snapshot) {
+    if (options.key && snapshot[options.key]) {
+      sum = snapshot[options.key].sum;
+    } else {
+      sum = snapshot.sum;
+    }
+  }
+  histogram.clear();
+  return sum;
+};