add config test

toREST/tests/config_test.cpp

@@ -0,0 +1,9 @@
+#include <Catch/catch.hpp>
+#include <config.hpp>
+
+SCENARIO("The configuration have default properties") {
+  Config config;
+  REQUIRE_FALSE(config.default_download_dir.empty());
+  REQUIRE_FALSE(config.root_dir.empty());
+  REQUIRE(config.default_download_dir == "toREST");
+}