tests: Add test suite shared identity management fixture

This is one of the two commits for issue #1683.
This one provides an identity management fixture which will be used to replace the existing
global IdentityFixture in the second commit.

Change-Id: I2eecaa2ee73661db328760ac957474791ff59112
Refs: #1683
diff --git a/tests/unit-tests/security/identity-management-fixture.hpp b/tests/unit-tests/security/identity-management-fixture.hpp
new file mode 100644
index 0000000..268d2ea
--- /dev/null
+++ b/tests/unit-tests/security/identity-management-fixture.hpp
@@ -0,0 +1,53 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2013-2014 Regents of the University of California.
+ *
+ * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
+ *
+ * ndn-cxx library is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License and GNU Lesser
+ * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
+ */
+
+#include "security/key-chain.hpp"
+#include <vector>
+
+#include "boost-test.hpp"
+
+namespace ndn {
+namespace security {
+
+/**
+ * @brief IdentityManagementFixture is a test suite level fixture.
+ * Test cases in the suite can use this fixture to create identities.
+ * Identities added via addIdentity method are automatically deleted
+ * during test teardown.
+ */
+class IdentityManagementFixture
+{
+public:
+  IdentityManagementFixture();
+
+  ~IdentityManagementFixture();
+
+  /// @brief add identity, return true if succeed.
+  bool
+  addIdentity(const Name& identity, const KeyParams& params = KeyChain::DEFAULT_KEY_PARAMS);
+
+protected:
+  KeyChain m_keyChain;
+  std::vector<Name> m_identities;
+};
+
+} // namespace security
+} // namespace ndn