import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

services/sync/tests/unit/test_extension_storage_engine.js

@@ -0,0 +1,62 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+Cu.import("resource://services-sync/engines.js");
+Cu.import("resource://services-sync/engines/extension-storage.js");
+Cu.import("resource://services-sync/service.js");
+Cu.import("resource://services-sync/util.js");
+Cu.import("resource://testing-common/services/sync/utils.js");
+Cu.import("resource://gre/modules/ExtensionStorageSync.jsm");
+
+Service.engineManager.register(ExtensionStorageEngine);
+const engine = Service.engineManager.get("extension-storage");
+do_get_profile();   // so we can use FxAccounts
+loadWebExtensionTestFunctions();
+
+function mock(options) {
+  let calls = [];
+  let ret = function() {
+    calls.push(arguments);
+    return options.returns;
+  }
+  Object.setPrototypeOf(ret, {
+    __proto__: Function.prototype,
+    get calls() {
+      return calls;
+    }
+  });
+  return ret;
+}
+
+add_task(function* test_calling_sync_calls__sync() {
+  let oldSync = ExtensionStorageEngine.prototype._sync;
+  let syncMock = ExtensionStorageEngine.prototype._sync = mock({returns: true});
+  try {
+    // I wanted to call the main sync entry point for the entire
+    // package, but that fails because it tries to sync ClientEngine
+    // first, which fails.
+    yield engine.sync();
+  } finally {
+    ExtensionStorageEngine.prototype._sync = oldSync;
+  }
+  equal(syncMock.calls.length, 1);
+});
+
+add_task(function* test_calling_sync_calls_ext_storage_sync() {
+  const extension = {id: "my-extension"};
+  let oldSync = ExtensionStorageSync.syncAll;
+  let syncMock = ExtensionStorageSync.syncAll = mock({returns: Promise.resolve()});
+  try {
+    yield* withSyncContext(function* (context) {
+      // Set something so that everyone knows that we're using storage.sync
+      yield ExtensionStorageSync.set(extension, {"a": "b"}, context);
+
+      yield engine._sync();
+    });
+  } finally {
+    ExtensionStorageSync.syncAll = oldSync;
+  }
+  do_check_true(syncMock.calls.length >= 1);
+});