assertThat(request.headers["If-Modified-Since"]).isNull()
  }

  private fun assertClientSuppliedCondition(
    seed: MockResponse,
    conditionName: String,
    conditionValue: String,
  ): RecordedRequest {
    server.enqueue(
      seed.newBuilder()
        .body("A")
        .build(),
    )
    server.enqueue(
      MockResponse.Builder()