xbt_dict_set(head,key,key,&free);
data = xbt_dict_get(head,key);
xbt_test_assert2(!strcmp(key,data), "Retrieved value (%s) != Injected value (%s)",key,data);
xbt_dict_set(head,key,key,&free);
data = xbt_dict_get(head,key);
xbt_test_assert2(!strcmp(key,data), "Retrieved value (%s) != Injected value (%s)",key,data);