@Throws(IOException::class)
        override fun writeTo(sink: BufferedSink) {
          GzipSink(sink).buffer().use(this@gzip::writeTo)
        }

        override fun isOneShot(): Boolean {
          return this@gzip.isOneShot()
        }
      }
    }
  }

  }

  @Test
  fun testFileDescriptor() {
    assertOnFileDescriptor { fd ->
      val requestBody = fd.toRequestBody()

      assertThat(requestBody.contentLength()).isEqualTo(-1L)
      assertThat(requestBody.isOneShot()).isEqualTo(true)
    }
  }

  @Test
  fun testFileDescriptorRead() {
    assertOnFileDescriptor(content = "Hello") { fd ->
      val requestBody = fd.toRequestBody()

      val buffer = Buffer()