adadded tests for enum serialization to test files

test_files/implementation.c

@@ -26,7 +26,9 @@ int main(int argc, char* argv[]) {
         .other_struct = a,
         .other_struct_typedef = {
             .b = -20, .u = 13, .a = -3.14, .dyn_str = "AWESOMEE"
-        }
+        },
+        .other_enum = VALUE_B,
+        .other_enum_typedef = VALUE_C
     };
 
     int required = struct_B_json_length(&b);