public void MoveSouth()
{
int x = 1000, y = -99, moveDistance = 10;
CleaningRobot robot = CreateTesterRobot(x, y);
robot.Move("S", moveDistance);
Assert.AreEqual(y - moveDistance, robot.YCoordinate);
}
public void MoveWest()
{
int x = 1000, y = -99, moveDistance = 3;
CleaningRobot robot = CreateTesterRobot(x, y);
robot.Move("W", moveDistance);
Assert.AreEqual(x - moveDistance, robot.XCoordinate);
}