public void GivenNullOrNonMatchingTypes_ThenWillThrowException()
{
var tt = new MyNumber(TestData.WellKnownInt);
Assert.That(() => tt.CompareTo((object?)null), Throws.ArgumentNullException);
Assert.That(() => tt.CompareTo((MyNumber?)null), Throws.ArgumentNullException);
Assert.That(() => tt.CompareTo(TestData.WellKnownInt), Throws.ArgumentException);
Assert.That(() => tt.CompareTo(TestData.WellKnownString), Throws.ArgumentException);
}
public void GivenMatchingTypes_ThenWillCompareByUnderlying()
{
var tt = new MyNumber(TestData.WellKnownInt);
var value = TestData.NextInt();
Assert.That(tt.CompareTo(new MyNumber(value)), Is.EqualTo(TestData.WellKnownInt.CompareTo(value)));
Assert.That(tt.CompareTo(new MyNumber(TestData.WellKnownInt)), Is.Zero);
Assert.That(tt.CompareTo((object)tt), Is.Zero);
Assert.That(tt.CompareTo(tt), Is.Zero);
}