assertFailsWith<IOException> {
        bodySource.readUtf8(21)
      }
    }
    assertThat(cache.writeAbortCount()).isEqualTo(1)
    assertThat(cache.writeSuccessCount()).isEqualTo(0)
    val response = get(server.url("/"))
    assertThat(response.body.string()).isEqualTo("Request #2")
    assertThat(cache.writeAbortCount()).isEqualTo(1)
    assertThat(cache.writeSuccessCount()).isEqualTo(1)
  }

  @Test