@Override
  public Health check() {
    if (processCommandWrapper.isCeOperational()) {
      return Health.GREEN;
    }

    return RED_HEALTH;
  }
@Test
  public void check_returns_RED_status_with_cause_if_ce_is_not_operational() {
    when(processCommandWrapper.isCeOperational()).thenReturn(false);

    Health health = underTest.check();

    assertThat(health.getStatus()).isEqualTo(Health.Status.RED);
    assertThat(health.getCauses()).containsOnly("Compute Engine is not operational");
  }