@Test protected void getSpanNames_noSpanName(TestInfo testInfo) throws Exception {
    String testSuffix = testSuffix(testInfo);
    Span span = spanBuilder(testSuffix).name(null).build();
    accept(span);

    assertThat(names().getSpanNames(span.localServiceName()).execute()).isEmpty();
  }
Ensures the span name index returns distinct results
zipkin-tests/src/main/java/zipkin2/storage/ITServiceAndSpanNames.java