Testing printed terminal output with JUnit 4.

TerminalViewTest.java

@RunWith(JUnit4.class)
public class TerminalViewTest extends TicTacToeTest {
    
    private final PrintStream stdout = System.out;
    private final ByteArrayOutputStream output = new ByteArrayOutputStream();
    private TerminalView terminalview;

    @Before
    public void setUp() throws UnsupportedEncodingException {
        terminalview = new TerminalView();
        System.setOut(new PrintStream(output, true, "UTF-8"));
    }

    @Test
    public void terminalViewShouldPrintBoards() {
        terminalview.print(nowins);
        assertEquals(nowins.toString(), output.toString());
    }
    
    @After
    public void cleanUp() {
        System.setOut(stdout);
    }
}