Set root for tests.

Author: asfernandes

src/common/tests/CommonTest.cpp

@@ -1,5 +1,8 @@
 #include "firebird.h"
 #include "firebird/Interface.h"
+#include "../common/classes/init.h"
+#include "../common/classes/TempFile.h"
+#include "../common/config/config.h"
 #include "../common/gdsassert.h"
 
 #define BOOST_TEST_MODULE CommonTest
@@ -14,6 +17,19 @@ int ISC_EXPORT fb_shutdown(unsigned int, const int)
 
 namespace Firebird
 {
+	namespace
+	{
+		struct Init
+		{
+			Init(auto&&)
+			{
+				Config::setRootDirectoryFromCommandLine(TempFile::getTempPath());
+			}
+		};
+
+		GlobalPtr<Init> init;
+	}
+
 	IMaster* API_ROUTINE fb_get_master_interface()
 	{
 		fb_assert(false);