public void TestUnion()
{
var mySet1 = new Set<int>();
mySet1.Add(1);
mySet1.Add(2);
var mySet2 = new Set<int>();
mySet2.Add(3);
mySet1.UnionOfSets(mySet2);
Assert.IsTrue(mySet1.IsExist(1) && mySet1.IsExist(2) && mySet1.IsExist(3));
}
