public void TestMethodUnionWithSet() { Set<int> s1 = new Set<int>(); s1.AddElement(0); s1.AddElement(1); Set<int> s2 = new Set<int>(); s2.AddElement(1); s2.AddElement(2); s2.AddElement(3); Set<int> s3 = new Set<int>(); for (int i = 0; i < 4; i++) { s3.AddElement(i); } Assert.IsTrue(s3 == s1.UnionWithSet(s2)); }