public void Throw_ArgumentNullException_WhenInputIsNull()
{
_hashFunction.Invoking(x => x.GetHashCode(null))
.Should().Throw <ArgumentNullException>();
}
public void Throw_ArgumentNullException_WhenInputIsNull()
{
_hashFunction.Invoking(x => x.GetHashCode(null))
.Should().Throw <ArgumentNullException>();
}