public void ProveThatPolymorphismIsApparent() { Tiger tiger = new Tiger(); Frog frog = new Frog(); Animal bird = new Bird(); string expectedTiger = "food"; string expectedFrog = "Bugs"; string expectedBird = "Dirt and stuff"; Assert.Equal(expectedTiger, tiger.Diet()); Assert.Equal(expectedFrog, frog.Diet()); Assert.Equal(expectedBird, bird.Diet()); }