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));
}
