public void AddByIndexNegativTests(int[] array, int index, int value, int[] expArray)
{
DoubleLList expected = new DoubleLList(expArray);
DoubleLList actual = new DoubleLList(array);
Assert.Throws <IndexOutOfRangeException>(() => actual.AddByIndex(index, value));
}
public void AddByIndexTest(int[] array, int index, int value, int[] expected)
{
DoubleLList Expect = new DoubleLList(expected);
DoubleLList actual = new DoubleLList(array);
actual.AddByIndex(index, value);
Assert.AreEqual(Expect, actual);
}