@Override
  public Date getStartedAt() {
    return new Date(state.getStartedAt());
  }
@Test
  public void test_startup_information() {
    long time = 123_456_789L;
    when(state.getStartedAt()).thenReturn(time);

    assertThat(underTest.getStartedAt().getTime()).isEqualTo(time);
  }