public void ThrowsWhenOverflowOccurs()
{
Assert.Throws <OverflowException>(() => MyEnumerable.Count(GetBigSequence()));
}
public void CountWhenNotEmpty()
{
var numbers = new[] { 1, 2, 3, 4 };
Assert.That(MyEnumerable.Count(numbers), Is.EqualTo(4));
}
public void ThrowsWhenSourceIsNull()
{
IEnumerable <Int32> numbers = null;
Assert.Throws <ArgumentNullException>(() => MyEnumerable.Count(numbers));
}
public void CountWhenEmpty()
{
var numbers = new List <Int32>();
Assert.That(MyEnumerable.Count(numbers), Is.EqualTo(0));
}