public void Cant_Add_Herbivore_With_SameSize_Or_Bigger_Carnivore() { //Arrange Animal a = new Animal(Size.Large, Sort.Herbivore, "Giraffe"); Animal b = new Animal(Size.Large, Sort.Carnivore, "Lion"); //Act _wagon.AddAnimalToWagon(a); bool isCompatible = _wagon.IsAnimalCompatableOrNot(b); //Assert Assert.IsFalse(isCompatible); }