private static void AssertChangeIsCorrectlyApplied(
eDirection startDirection,
eDirectionChange deltaDirection,
eDirection expectedDirection)
{
var resultantDirectionFromTurn = startDirection.Turn(deltaDirection);
var resultantDirectionFromApplyTo = deltaDirection.ApplyTo(startDirection);
Assert.AreEqual(expectedDirection, resultantDirectionFromTurn);
Assert.AreEqual(expectedDirection, resultantDirectionFromApplyTo);
}
public static IEnumerable <eDirection> Enumerate(eDirection startingDirection = eDirection.North, eDirectionChange deltaDirection = eDirectionChange.Clockwise)
{
eDirection currentDirection = startingDirection;
for (int i = 0; i < 4; i++)
{
yield return(currentDirection);
currentDirection = currentDirection.Turn(deltaDirection);
}
// ReSharper disable once RedundantJumpStatement
yield break;
}
public static eDirection ApplyTo(this eDirectionChange change, eDirection originalDirection)
{
return(originalDirection.Turn(change));
}