public void TestAnimalShelter()
{
var shelter = new AnimalShelter();
Assert.Throws <Exception>(() => shelter.TakeCat(), "No more cats.");
Assert.Throws <Exception>(() => shelter.TakeDog(), "No more dogs.");
Assert.Throws <Exception>(() => shelter.TakeAnimal(), "No more animal.");
shelter.AddCat(new Cat("cat1"));
shelter.AddCat(new Cat("cat2"));
shelter.AddDog(new Dog("dog1"));
shelter.AddDog(new Dog("dog2"));
shelter.AddCat(new Cat("cat3"));
Assert.AreEqual("cat1", shelter.TakeCat().Name);
Assert.AreEqual("dog1", shelter.TakeDog().Name);
Assert.AreEqual("cat2", shelter.TakeAnimal().Name);
Assert.AreEqual("dog2", shelter.TakeAnimal().Name);
Assert.AreEqual("cat3", shelter.TakeCat().Name);
}
