public void TurnLeftTest()
{
ToyRobotTurningService turningService = new ToyRobotTurningService();
Robot robot = new Robot();
Position position = new Position(3, 1);
Facing facing = Facing.NORTH;
robot.Position = position;
robot.Facing = facing;
turningService.TurnLeft(robot);
Assert.AreEqual(Facing.WEST, robot.Facing);
turningService.TurnLeft(robot);
Assert.AreEqual(Facing.SOUTH, robot.Facing);
turningService.TurnLeft(robot);
Assert.AreEqual(Facing.EAST, robot.Facing);
turningService.TurnLeft(robot);
Assert.AreEqual(Facing.NORTH, robot.Facing);
Assert.AreEqual(3, robot.Position.X);
Assert.AreEqual(1, robot.Position.Y);
}
public void TurnLeftTest_ArgumentException()
{
ToyRobotTurningService turningService = new ToyRobotTurningService();
Robot robot = new Robot();
turningService.TurnLeft(robot);
}