val buffer = Buffer()
    body.writeTo(buffer)
    assertThat(body.contentLength()).isEqualTo(buffer.size)
    assertThat(buffer.readUtf8()).isEqualTo(expected)
  }

  @Test
  fun threeParts() {
    val expected =
      """
      |--123
      |
      |Quick
      |--123
      |
      |Brown
      |--123
      |
      |Fox
      |--123--
      |