val response = builder.build()
    val body = Buffer()
    response.body!!.writeTo(body)
    assertThat(body.readUtf8()).isEqualTo("ABC")
  }

  @Test
  fun mockResponseAddHeader() {
    val builder =
      MockResponse
        .Builder()
        .clearHeaders()
        .addHeader("Cookie: s=square")
        .addHeader("Cookie", "a=android")