Add test for interface IP detection tools

test/tools/_network.cxx

@@ -0,0 +1,28 @@
+/********************************************************************************
+ *    Copyright (C) 2018 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH    *
+ *                                                                              *
+ *              This software is distributed under the terms of the             *
+ *              GNU Lesser General Public Licence (LGPL) version 3,             *
+ *                  copied verbatim in the file "LICENSE"                       *
+ ********************************************************************************/
+
+#include <gtest/gtest.h>
+#include <fairmq/Tools.h>
+
+#include <string>
+
+namespace
+{
+
+using namespace std;
+using namespace fair::mq;
+
+TEST(Tools, Network)
+{
+    string interface = fair::mq::tools::getDefaultRouteNetworkInterface();
+    EXPECT_NE(interface, "");
+    string interfaceIP = fair::mq::tools::getInterfaceIP(interface);
+    EXPECT_NE(interfaceIP, "");
+}
+
+} /* namespace */