public void ListResult()
        {
            var interactor = new LoadZooInteractor(_listGateway.Object);
            var result     = interactor.Execute();

            Assert.Equal(_list, result);
        }
        public void EmptyResult()
        {
            var interactor = new LoadZooInteractor(_emptyGateway.Object);
            var result     = interactor.Execute();

            Assert.Empty(result);
        }