public void CorrectRequestForAddConnectionPool() { var factory = Substitute.For <IConnection>(); var client = new DatabasesClient(factory); var pool = new Models.Requests.ConnectionPool(); client.AddConnectionPool("1", pool); var parameters = Arg.Is <List <Parameter> >(list => (string)list[0].Value == "1"); factory.Received().ExecuteRequest <ConnectionPool>("databases/{id}/pools", parameters, pool, "pool", Method.POST); }