@Test
	public void whenArcherUsesFortifyItDobblesItsDefense(){
		Position p = new Position(2,0);
		int oldDef = game.getUnitAt(p).getDefensiveStrength();
		game.performUnitActionAt(p);
		assertEquals(oldDef * 2, game.getUnitAt(p).getDefensiveStrength());
	}