@Test void httpRequestCountIncrements() throws IOException {
    assertPostSpansV1Success(spans);
    assertPostSpansV1Success(spans);

    assertThat(zipkin.httpRequestCount()).isEqualTo(2);
  }
The raw query can show affects like redundant rows in the data store.
zipkin-junit5/src/test/java/zipkin2/junit5/ZipkinExtensionTest.java