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