public void HerbivoresBreedAndAddNewHerbivore()
{
toAdd.Clear();
Position herbivore1Position = new Position(1, 1);
Position herbivore2Position = new Position(2, 1);
Herbivore herbivore1 = new Herbivore(herbivore1Position, BeginTerrarium);
Herbivore herbivore2 = new Herbivore(herbivore2Position, BeginTerrarium);
herbivore1.Breed(toAdd);
Assert.AreEqual(1, toAdd.Count); // test of nieuwe herbivoor is aangemaakt
}