public void index_get_all()
        {
            var controller = new SystemController(_repository);

            _repository.Add(new Domain.Entities.System()
            {
                SystemId = 1, Name = "App 1"
            });
            _repository.Add(new Domain.Entities.System()
            {
                SystemId = 2, Name = "App 2"
            });

            var result = controller.Index();

            result.Should().BeViewResult().ModelAs <IEnumerable <Domain.Entities.System> >().Should().HaveCount(2);
        }