public void CorrectRequestForGetAllByTag() { var factory = Substitute.For <IConnection>(); var client = new DatabasesClient(factory); client.GetAllByTag("awesome"); var parameters = Arg.Is <List <Parameter> >(list => list[0].Name == "tag_name" && (string)list[0].Value == "awesome"); factory.Received().GetPaginated <DatabaseCluster>("databases", parameters, "databases"); }