Problem: test file not correctly named

Solution: move and split example_add.cpp

tests/context.cpp

@@ -0,0 +1,15 @@
+#include <gtest/gtest.h>
+#include <zmq.hpp>
+
+TEST(context, create_default_destroy)
+{
+    zmq::context_t context;
+}
+
+TEST(context, create_close)
+{
+    zmq::context_t context;
+    context.close();
+    
+    ASSERT_EQ(NULL, (void*)context);
+}