public void EmptyIsProperSubsetOfTest() { var intSetFirst = new GenericSet <int>(); var intSetSecond = new GenericSet <int>(); var firstData = new int[] { 5, 16, -32, 56, 0, 5, 44, 16, 13 }; for (int i = 0; i < firstData.Length; ++i) { intSetFirst.Add(firstData[i]); } Assert.IsTrue(intSetSecond.IsProperSubsetOf(intSetFirst)); }