public void ElementAtOrDefault_With_OutOfRange_Must_ReturnDefault(int[] source, int index)
{
// Arrange
var wrapped = Wrap.AsValueReadOnlyList(source);
// Act
var result = ReadOnlyList.ElementAtOrDefault <Wrap.ValueReadOnlyList <int>, int>(wrapped, index);
// Assert
_ = result.Must()
.BeEqualTo(default);
public void List_ElementAtOrDefault()
{
var list = new int[0];
Assert.AreEqual(0, ReadOnlyList.ElementAtOrDefault(list, 3));
list = new int[] { 3 };
Assert.AreEqual(3, ReadOnlyList.ElementAtOrDefault(list, 0));
Assert.AreEqual(0, ReadOnlyList.ElementAtOrDefault(list, 1));
list = new int[] { 9, 3, 1 };
Assert.AreEqual(1, ReadOnlyList.ElementAtOrDefault(list, 2));
var list2 = new string[] { };
Assert.AreEqual((string)null, ReadOnlyList.ElementAtOrDefault(list2, 0));
list2 = new string[] { "one" };
Assert.AreEqual("one", ReadOnlyList.ElementAtOrDefault(list2, 0));
list2 = new string[] { "three", "two", "one" };
Assert.AreEqual("two", ReadOnlyList.ElementAtOrDefault(list2, 1));
Assert.AreEqual((string)null, ReadOnlyList.ElementAtOrDefault(list2, 3));
}