@Test protected void getLocalServiceNames_noServiceName(TestInfo testInfo) throws Exception {
    String testSuffix = testSuffix(testInfo);
    accept(spanBuilder(testSuffix).localEndpoint(null).build());

    assertThat(names().getServiceNames().execute()).isEmpty();
  }
Base test for {@link ServiceAndSpanNames}.

<p>Subtypes should create a connection to a real backend, even if that backend is in-process.
zipkin-tests/src/main/java/zipkin2/storage/ITServiceAndSpanNames.java