UITest.java

  private UI ui;
  private MockPrintStream printStream;

    @Before
    public void setUp() {
        MockOutputStream outputStream = new MockOutputStream();
        printStream = new MockPrintStream(outputStream);
        printStream.setPrintCallHistory(new ArrayList<String>());
        ui = new UI(printStream);
    }
    
    @Test
    public void testGetNextMove() {
      MockBufferedReader bufferedReader = new MockBufferedReader(new InputStreamReader(ui.input));
      ui.setBufferedReader(bufferedReader);
      ArrayList<String> inputArray = new ArrayList<String>();
      inputArray.add("1");
      bufferedReader.setInputHistory(inputArray);
      assertEquals("1", ui.getNextMove());
    }