.build()
    val expected = "a+%3D%26+b=c+%3D%26+d&e+%3D%26+f=g+%3D%26+h&%25=%25"
    val out = Buffer()
    body.writeTo(out)
    assertThat(out.readUtf8()).isEqualTo(expected)
  }

  @Test
  fun encodedPair() {
    val body =
      FormBody.Builder()
        .add("sim", "ple")
        .build()
    val expected = "sim=ple"
    assertThat(body.contentLength()).isEqualTo(expected.length.toLong())
    val buffer = Buffer()