public void DListContainsTest() { int[] arr = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }; DList <int> list = new DList <int>(arr); Assert.IsTrue(list.Contains(1)); Assert.IsTrue(list.Contains(6)); Assert.IsTrue(list.Contains(10)); Assert.IsFalse(list.Contains(-1)); Assert.IsFalse(list.Contains(25)); Assert.IsFalse(list.Contains(Int32.MinValue)); Assert.IsFalse(list.Contains(Int32.MaxValue)); }