@Test void dailyIndexFormat_overridingDateSeparator_invalidToBeMultiChar() {
    assertThatExceptionOfType(BeanCreationException.class).isThrownBy(() -> {
      TestPropertyValues.of(
        "zipkin.storage.type:elasticsearch",
        "zipkin.storage.elasticsearch.hosts:http://host1:9200",
        "zipkin.storage.elasticsearch.date-separator:blagho")
        .applyTo(context);
      Access.registerElasticsearch(context);

      context.refresh();
    });
  }
Ensures we can wire up network interceptors, such as for logging or authentication
zipkin-server/src/test/java/zipkin2/server/internal/elasticsearch/ZipkinElasticsearchStorageConfigurationTest.java