public void When_Rover_At_1_2_South_And_Move_Should_Be_1_1() { var direction = new South(); var newCoordinates = direction.MoveForward(new Coordinates(1, 2)); Assert.That(newCoordinates.XCoordinate, Is.EqualTo(1)); Assert.That(newCoordinates.YCoordinate, Is.EqualTo(1)); }