public void GetBeamsCollectionTest() { Beam testBeam = new Beam(new Point(2, 2)); instance.AddBeam(testBeam); ICollection <Beam> expectedResult = new List <Beam>(); expectedResult.Add(testBeam); ICollection actualResult = (ICollection)instance.GetBeams(); CollectionAssert.AreEquivalent((ICollection)expectedResult, actualResult); }