@Before
	public void setUp() throws IOException {
		outputStream = new ByteArrayOutputStream();
		world4x4 = worldFactory.createWorld(cells4x4);
		StringBuilder expected = new StringBuilder("");
		for (int i = 0; i < world4x4.getWidth(); i++) {
			for (int j = 0; j < world4x4.getHeight(); j++) {
				expected.append(cells4x4[i][j] == Cell.LIVING ? LIVING_CELL : DEAD_CELL);
			}
			if (i + 1 != cells4x4.length) {
				expected.append(LINE_SEPARATOR);
			}
		}
		world4x4String = expected.toString();
		worldFile = folder.newFile("worldFile");
		
	}