[Sync] Ensure cryptographer ready before encrypting.

chrome/browser/sync/util/cryptographer_unittest.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/sync/util/cryptographer.h"
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/string_util.h"
 #include "chrome/browser/password_manager/encryptor.h"
 #include "chrome/browser/sync/protocol/password_specifics.pb.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace browser_sync {
 
 TEST(CryptographerTest, EmptyCantDecrypt) {
   Cryptographer cryptographer;
   EXPECT_FALSE(cryptographer.is_ready());
 
   sync_pb::EncryptedData encrypted;
   encrypted.set_key_name("foo");
   encrypted.set_blob("bar");
 
   EXPECT_FALSE(cryptographer.CanDecrypt(encrypted));
 }
 
+TEST(CryptographerTest, EmptyCantEncrypt) {
+  Cryptographer cryptographer;
+  EXPECT_FALSE(cryptographer.is_ready());
+
+  sync_pb::EncryptedData encrypted;
+  sync_pb::PasswordSpecificsData original;
+  EXPECT_FALSE(cryptographer.Encrypt(original, &encrypted));
+}
+
 TEST(CryptographerTest, MissingCantDecrypt) {
   Cryptographer cryptographer;
 
   KeyParams params = {"localhost", "dummy", "dummy"};
   cryptographer.AddKey(params);
   EXPECT_TRUE(cryptographer.is_ready());
 
   sync_pb::EncryptedData encrypted;
   encrypted.set_key_name("foo");
   encrypted.set_blob("bar");
@@ skipping 125 matching lines @@
 
   std::string user_key, encryption_key, mac_key;
   ASSERT_TRUE(unpacked->ExportKeys(&user_key, &encryption_key, &mac_key));
 
   EXPECT_EQ(expected_user, user_key);
   EXPECT_EQ(expected_encryption, encryption_key);
   EXPECT_EQ(expected_mac, mac_key);
 }
 
 }  // namespace browser_sync