### Question:
MetricsHttpService implements MetricsService { private void handleEmptyRequest(final RoutingContext routingContext) { routingContext.response().setStatusCode(201).end(); } MetricsHttpService(
      final Vertx vertx,
      final MetricsConfiguration configuration,
      final MetricsSystem metricsSystem); @Override CompletableFuture<?> start(); @Override CompletableFuture<?> stop(); @Override Optional<Integer> getPort();  }### Answer:
@Test public void handleEmptyRequest() throws Exception { try (final Response resp = client.newCall(buildGetRequest("")).execute()) { assertThat(resp.code()).isEqualTo(201); } }