public void RotateDirection_ReturnsRotated()
{
Assert.AreEqual(OrthogonalLine.Direction.Bottom, OrthogonalLine.RotateDirection(OrthogonalLine.Direction.Right, 90));
Assert.AreEqual(OrthogonalLine.Direction.Top, OrthogonalLine.RotateDirection(OrthogonalLine.Direction.Bottom, -180));
}