public void GetNumberOfAnimalsInShelterTest_Zero()
        {
            var shelter = new ShelterRepository(1);
            Cat cat     = new Cat {
                Name = "cat", AgeInHumanYears = 2
            };

            var expected = 0;
            var actual   = shelter.GetNumberOfAnimalsInShelter(cat.GetType());

            Assert.AreEqual(expected, actual);
        }