val response = call.execute()
    assertThat(response.body.string()).isEqualTo("a")
    assertThat(listener.recordedEventTypes())
      .containsExactly("CallStart", "CallEnd")
  }

  /** Response headers start, then the entire request body, then response headers end.  */
  @Test
  fun expectContinueStartsResponseHeadersEarly() {
    server.enqueue(
      MockResponse.Builder()
        .add100Continue()