[Sync] Add unit tests for ChromeEncryptor

chrome/browser/sync/glue/chrome_encryptor_unittest.cc

Index: chrome/browser/sync/glue/chrome_encryptor_unittest.cc
diff --git a/chrome/browser/sync/glue/chrome_encryptor_unittest.cc b/chrome/browser/sync/glue/chrome_encryptor_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0a04c04755cba2df298e71eefa7af760b05fdb97
--- /dev/null
+++ b/chrome/browser/sync/glue/chrome_encryptor_unittest.cc
@@ -0,0 +1,36 @@
+// Copyright (c) 2012 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/password_manager/encryptor.h"
+#include "chrome/browser/sync/glue/chrome_encryptor.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace browser_sync {
+
+namespace {
+
+const char kPlaintext[] = "The Magic Words are Squeamish Ossifrage";
+
+class ChromeEncryptorTest : public testing::Test {
+ protected:
+  ChromeEncryptor encryptor_;
+};
+
+TEST_F(ChromeEncryptorTest, EncryptDecrypt) {
+#if defined(OS_MACOSX)
+  // ChromeEncryptor ends up needing access to the keychain on OS X,
+  // so use the mock keychain to prevent prompts.
+  ::Encryptor::UseMockKeychain(true);
+#endif
+  std::string ciphertext;
+  EXPECT_TRUE(encryptor_.EncryptString(kPlaintext, &ciphertext));
+  EXPECT_NE(kPlaintext, ciphertext);
+  std::string plaintext;
+  EXPECT_TRUE(encryptor_.DecryptString(ciphertext, &plaintext));
+  EXPECT_EQ(kPlaintext, plaintext);
+}
+
+}  // namespace
+
+}  // namespace browser_sync