tests: Customize environment to run test cases

This commit minimizes the impact of running unit tests on the host
system. In particular, the test cases will have its own public info and
TPM.

Change-Id: Ic6e78ebd80dea920806ca1898caa6a2eac30348b
diff --git a/tests/global-configuration.cpp b/tests/global-configuration.cpp
index 24d4499..2be5a67 100644
--- a/tests/global-configuration.cpp
+++ b/tests/global-configuration.cpp
@@ -1,11 +1,12 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2014  Regents of the University of California,
- *                     Arizona Board of Regents,
- *                     Colorado State University,
- *                     University Pierre & Marie Curie, Sorbonne University,
- *                     Washington University in St. Louis,
- *                     Beijing Institute of Technology
+ * Copyright (c) 2014-2016,  Regents of the University of California,
+ *                           Arizona Board of Regents,
+ *                           Colorado State University,
+ *                           University Pierre & Marie Curie, Sorbonne University,
+ *                           Washington University in St. Louis,
+ *                           Beijing Institute of Technology,
+ *                           The University of Memphis.
  *
  * This file is part of NFD (Named Data Networking Forwarding Daemon).
  * See AUTHORS.md for complete list of NFD authors and contributors.
@@ -20,13 +21,14 @@
  *
  * You should have received a copy of the GNU General Public License along with
  * NFD, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
- **/
+ */
 
 #include "test-common.hpp"
 #include "core/logger.hpp"
 #include "core/config-file.hpp"
 
 #include <boost/filesystem.hpp>
+#include <fstream>
 
 namespace nfd {
 namespace tests {
@@ -44,7 +46,27 @@
 
         config.parse(filename, false);
       }
+
+    if (std::getenv("HOME"))
+      m_home = std::getenv("HOME");
+
+    boost::filesystem::path dir(UNIT_TEST_CONFIG_PATH "test-home");
+    setenv("HOME", dir.generic_string().c_str(), 1);
+    boost::filesystem::create_directories(dir);
+    std::ofstream clientConf((dir / ".ndn" / "client.conf").generic_string().c_str());
+    clientConf << "pib=pib-sqlite3\n"
+               << "tpm=tpm-file" << std::endl;
   }
+
+  ~GlobalConfigurationFixture()
+  {
+    if (!m_home.empty()) {
+      setenv("HOME", m_home.c_str(), 1);
+    }
+  }
+
+private:
+  std::string m_home;
 };
 
 BOOST_GLOBAL_FIXTURE(GlobalConfigurationFixture)
diff --git a/tests/identity-management-fixture.cpp b/tests/identity-management-fixture.cpp
index c668f54..1575fa8 100644
--- a/tests/identity-management-fixture.cpp
+++ b/tests/identity-management-fixture.cpp
@@ -1,22 +1,26 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2013-2014 Regents of the University of California.
+ * Copyright (c) 2014-2016,  Regents of the University of California,
+ *                           Arizona Board of Regents,
+ *                           Colorado State University,
+ *                           University Pierre & Marie Curie, Sorbonne University,
+ *                           Washington University in St. Louis,
+ *                           Beijing Institute of Technology,
+ *                           The University of Memphis.
  *
- * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
+ * This file is part of NFD (Named Data Networking Forwarding Daemon).
+ * See AUTHORS.md for complete list of NFD authors and contributors.
  *
- * 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.
+ * NFD is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU 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.
+ * NFD 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 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.
+ * You should have received a copy of the GNU General Public License along with
+ * NFD, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include "identity-management-fixture.hpp"
@@ -27,6 +31,7 @@
 IdentityManagementFixture::IdentityManagementFixture()
   : m_keyChain("sqlite3", "file")
 {
+  m_keyChain.getDefaultCertificate(); // side effect: creation of the default cert if doesn't exist
 }
 
 IdentityManagementFixture::~IdentityManagementFixture()
diff --git a/tests/other/wscript b/tests/other/wscript
index 074e72c..805735c 100644
--- a/tests/other/wscript
+++ b/tests/other/wscript
@@ -45,4 +45,5 @@
            use='daemon-objects unit-tests-base unit-tests-%s-main' % module,
            includes='.',
            install_path=None,
+           defines='UNIT_TEST_CONFIG_PATH=\"%s/tmp-files/\"' % bld.bldnode,
          )
diff --git a/tests/wscript b/tests/wscript
index 823d25e..3b9e628 100644
--- a/tests/wscript
+++ b/tests/wscript
@@ -37,6 +37,7 @@
             source=bld.path.ant_glob(['*.cpp'], excl='main.cpp'),
             use='core-objects',
             headers='../common.hpp boost-test.hpp',
+            defines='UNIT_TEST_CONFIG_PATH=\"%s/tmp-files/\"' % bld.bldnode,
           )
 
         for module, name in {"core": "NFD Core Tests",
@@ -62,6 +63,7 @@
                 use='%s-objects unit-tests-base unit-tests-%s-main' % (module, module),
                 includes='.',
                 install_path=None,
+                defines='UNIT_TEST_CONFIG_PATH=\"%s/tmp-files/\"' % bld.bldnode,
               )
 
             if bld.env['HAVE_LIBPCAP']: