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);
}
