public void IsFirstReturnsTrueWhenFirstValueIsPresent()
{
const uint value = 0x6a09e667;
var target = new Either<uint, string>(value);
Assert.That(target.IsFirst());
}
public void IsFirstReturnsFalseWhenFirstValueIsNotPresent()
{
const string value = "6a09e667";
var target = new Either<uint, string>(value);
Assert.That(!target.IsFirst());
}