* by a colon and a value.
     */
    fun addHeader(header: String) =
      apply {
        headers.add(header)
      }

    /**
     * Adds a new header with the name and value. This may be used to add multiple headers with the
     * same name.
     */
    fun addHeader(
      name: String,
      value: Any,
    ) = apply {

    val body =
      MockStreamHandler()
        .sendResponse("ok")
        .exhaustResponse()
    server.enqueue(
      MockResponse.Builder()
        .clearHeaders()
        .addHeader("h1", "v1")
        .addHeader("h2", "v2")
        .trailers(headersOf("trailers", "boom"))
        .streamHandler(body)
        .build(),
    )
    val call =
      client.newCall(
        Request.Builder()

        .status("ICY 200 OK")
        .addHeader("Accept-Ranges: none")
        .addHeader("Content-Type: audio/mpeg")
        .addHeader("icy-br:128")
        .addHeader("ice-audio-info: bitrate=128;samplerate=44100;channels=2")
        .addHeader("icy-br:128")
        .addHeader("icy-description:Rock")
        .addHeader("icy-genre:riders")
        .addHeader("icy-name:A2RRock")
        .addHeader("icy-pub:1")

    var headers: Headers = mockResponse.headers
    var trailers: Headers = mockResponse.trailers
    mockResponse = mockResponse.clearHeaders()
    mockResponse = mockResponse.addHeader("")
    mockResponse = mockResponse.addHeader("", "")
    mockResponse = mockResponse.addHeaderLenient("", Any())
    mockResponse = mockResponse.setHeader("", Any())
    mockResponse.headers = headersOf()
    mockResponse.trailers = headersOf()

      MockResponse()
        .clearHeaders()
        .addHeader("Cookie: s=square")
        .addHeader("Cookie", "a=android")
    assertThat(headersToList(response))
      .containsExactly("Cookie: s=square", "Cookie: a=android")
  }

  @Test
  fun mockResponseSetHeader() {
    val response =
      MockResponse()
        .clearHeaders()
        .addHeader("Cookie: s=square")
        .addHeader("Cookie: a=android")

        .clearHeaders()
        .addHeader("Cookie: s=square")
        .addHeader("Cookie", "a=android")
    assertThat(headersToList(builder)).containsExactly("Cookie: s=square", "Cookie: a=android")
  }

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

      chain.proceed(
        originalRequest.newBuilder()
          .method("POST", uppercase(originalRequest.body))
          .addHeader("OkHttp-Intercepted", "yep")
          .build(),
      )
    }
    val request =
      Request.Builder()
        .url(server.url("/"))
        .addHeader("Original-Header", "foo")
        .method("PUT", "abc".toRequestBody("text/plain".toMediaType()))
        .build()

    builder.header("AZab09~", "AZab09 ~")
    builder.addHeader("AZab09~", "AZab09 ~")
  }

  @Test
  fun emptyNameForbidden() {
    val builder = Request.Builder()
    assertFailsWith<IllegalArgumentException> {
      builder.header("", "Value")
    }
    assertFailsWith<IllegalArgumentException> {
      builder.addHeader("", "Value")
    }
  }

  @Test

  @Test
  fun authenticatingTunnelProxyConnect() {
    enableTlsWithTunnel()
    server.enqueue(
      MockResponse.Builder()
        .inTunnel()
        .code(407)
        .addHeader("Proxy-Authenticate: Basic realm=\"localhost\"")
        .addHeader("Connection: close")
        .build(),
    )
    server.enqueue(
      MockResponse.Builder()
        .inTunnel()
        .build(),
    )

    Request request = new Request.Builder()
        .url("https://api.github.com/repos/square/okhttp/issues")
        .header("User-Agent", "OkHttp Headers.java")
        .addHeader("Accept", "application/json; q=0.5")
        .addHeader("Accept", "application/vnd.github.v3+json")
        .build();

    try (Response response = client.newCall(request).execute()) {