@Test
void shouldReturnKnownContributor() {
	ReactiveDiscoveryHealthIndicator indicator = mock(
			ReactiveDiscoveryHealthIndicator.class);
	Health health = Health.up().build();
	when(indicator.getName()).thenReturn("known");
	when(indicator.health()).thenReturn(Mono.just(health));

	ReactiveDiscoveryCompositeHealthContributor healthContributor = new ReactiveDiscoveryCompositeHealthContributor(
			singletonList(indicator));

	assertThat(healthContributor.getContributor("known")).isNotNull();
	Iterator<NamedContributor<ReactiveHealthContributor>> iterator = healthContributor
			.iterator();
	assertThat(iterator.hasNext()).isTrue();
	NamedContributor<ReactiveHealthContributor> contributor = iterator.next();
	assertThat(contributor).isNotNull();
	assertThat(contributor.getName()).isEqualTo("known");
	assertThat(contributor.getContributor()).isNotNull();
	assertThat(contributor.getContributor())
			.isInstanceOf(ReactiveHealthIndicator.class);
	ReactiveHealthIndicator healthIndicator = (ReactiveHealthIndicator) contributor
			.getContributor();
	StepVerifier.create(healthIndicator.getHealth(true)).expectNext(health)
			.expectComplete().verify();
}
 

private ReactiveHealthIndicator asHealthIndicator(
		ReactiveDiscoveryHealthIndicator indicator) {
	return (indicator != null) ? indicator::health : null;
}