@Test
  protected void ignores_when_key_not_in_autocompleteTags(TestInfo testInfo) throws Exception {
    String testSuffix = testSuffix(testInfo);
    accept(spanBuilder(testSuffix)
      .putTag("http.method", "GET")
      .build());

    assertThat(storage.autocompleteTags().getKeys().execute()).doesNotContain("http.method");

    assertThat(storage.autocompleteTags().getValues("http.method").execute()).isEmpty();
  }
Base test for when {@link StorageComponent.Builder#autocompleteKeys(List)} has values.

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