public void TheLocationValue_ResetsAtBoundary()
{
var locationService = new LocationService();
var oneOverBoundary = locationService.AdvanceBy(Location.Start, 12);
Assert.That(Location.Start, Is.EqualTo(oneOverBoundary));
}
public void GivenValidOffset_WhenAdvancing_FinalPosition_IsSumModuloTwelve(int initialPosition, int offset)
{
var locationService = new LocationService();
var initialLocation = new Location(initialPosition);
var finalPosition = locationService.AdvanceBy(initialLocation, offset);
Assert.That(finalPosition, Is.EqualTo(new Location((initialPosition + offset) % 12)));
}
public void NegativeValues_AreForbidden_WhenAdvancing(int invalidOffset)
{
var locationService = new LocationService();
Assert.Throws <ArgumentException>(
() =>
{
var x = locationService.AdvanceBy(Location.Start, invalidOffset);
});
}