@Test
  public void givenLatchIsOn_whenTryToPassAfterFirstAttempt_thenAllAreSuccessful() {
    latch.turnOn();

    latch.tryToPass();
    assertAllTryToPassAttemptsAreSuccessful(anyNumAttempts());
  }
  @Test
  public void givenLatchIsOn_whenTryToPass_thenFailed() {
    latch.turnOn();

    assertFalse(latch.tryToPass());
  }