public void testDolphin() { Dolphin franklin = new Dolphin() { Waterboi = true, shouldRide = "absolutely" }; franklin.makeMilk(); string expected = "Make that milk"; string expectedInterface = "absolutely"; Assert.Equal(expected, franklin.makeMilk()); Assert.True(franklin.Waterboi); //test below checks for interface + ridable Assert.Equal(expectedInterface, franklin.shouldRide); }