CLIBoardTest.java

public class CLIBoardTest {
    private CLIBoard cliBoard;
    private MockPrintStream printStream;

    @Before
    public void setUp() throws Exception {
      MockOutputStream outputStream = new MockOutputStream();
      printStream = new MockPrintStream(outputStream);
      printStream.setPrintCallHistory(new ArrayList<String>());
      cliBoard = new CLIBoard(printStream);
    }

    @Test
    public void testPrintDivider() {
      String expectedOutput = "------------------\n";
      cliBoard.printDivider();
      assertEquals(expectedOutput, printStream.lastPrintCall());
    }
  ...
  }