public void TestPortion() { Bottle justABottle = new Bottle("something"); Portion invalidPortion = new Portion("something", 0); Assert.IsFalse(invalidPortion.IsValid(), "Invalid portion 1"); justABottle.Name = "something"; Portion validPortion = new Portion("something", 2); Assert.IsTrue(validPortion.IsValid(), "Valid portion 1"); }