public void SelectWhenNotEmpty()
{
var numbers = new[] { 1, 2, 3 };
Assert.That(MyEnumerable.Select(numbers, n => n + 1), Is.EquivalentTo(new[] { 2, 3, 4 }));
}
public void ThrowsWhenSourceIsNull()
{
IEnumerable <Int32> numbers = null;
Assert.Throws <ArgumentNullException>(() => MyEnumerable.Select(numbers, n => n + 1));
}
public void SelectWhenEmpty()
{
var numbers = new List <Int32>();
Assert.That(MyEnumerable.Select(numbers, n => n), Is.Empty);
}