}

    /**
     * Adds [header] as an HTTP header. For well-formed HTTP [header] should contain a name followed
     * 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.
     */

     * Adds all headers from an existing collection.
     */
    fun addAll(headers: Headers) = commonAddAll(headers)

    /**
     * Add a header with the specified name and formatted date. Does validation of header names and
     * value.
     */
    fun add(
      name: String,
      value: Date,
    ) = add(name, value.toHttpDateString())

    /**

     * with that name, they are all replaced.
     */
    open fun header(
      name: String,
      value: String,
    ) = commonHeader(name, value)

    /**
     * Adds a header with [name] to [value]. Prefer this method for multiply-valued
     * headers like "Set-Cookie".
     */
    open fun addHeader(
      name: String,
      value: String,
    ) = commonAddHeader(name, value)

    assertThat(routeSelector.hasNext()).isFalse()
  }

  @Test fun proxyDnsFailureContinuesToNextProxy() {
    val address = factory.newAddress()
    proxySelector.proxies.add(proxyA)
    proxySelector.proxies.add(proxyB)
    proxySelector.proxies.add(proxyA)
    val routeSelector = newRouteSelector(address)
    proxySelector.assertRequests(address.url.toUri())
    assertThat(routeSelector.hasNext()).isTrue()

    fun duration(
      duration: Long,
      unit: TimeUnit,
    ) = apply {
      val now = System.currentTimeMillis()
      validityInterval(now, now + unit.toMillis(duration))
    }

    /**
     * Adds a subject alternative name (SAN) to the certificate. This is usually a literal hostname,
     * a literal IP address, or a hostname pattern. If no subject alternative names are added that
     * extension will be omitted.
     */

 *
 * ```java
 * CertificatePinner certificatePinner = new CertificatePinner.Builder()
 *     .add("publicobject.com", "sha256/afwiKY3RxoMmLkuRW1l7QsPZTJPwDS2pdDROQjXw8ig=")
 *     .add("publicobject.com", "sha256/klO23nT2ehFDXCfx3eHTDRESMz3asj1muO+4aIdjiuY=")
 *     .add("publicobject.com", "sha256/grX4Ta9HpZx6tSHkmCrvpApTQGo67CYDnvprLg5yRME=")
 *     .add("publicobject.com", "sha256/lCppFqbkrlJ3EcVFAkeip0+44VaoJUymbnOaEUk7tEU=")
 *     .build();
 * ```

    val cookieA = HttpCookie("a", "android")
    cookieA.domain = serverUrl.host
    cookieA.path = "/"
    cookieManager.cookieStore.add(serverUrl.toUri(), cookieA)
    val cookieB = HttpCookie("b", "banana")
    cookieB.domain = serverUrl.host
    cookieB.path = "/"
    cookieManager.cookieStore.add(serverUrl.toUri(), cookieB)
    client =
      client.newBuilder()
        .cookieJar(JavaNetCookieJar(cookieManager))

 *
 * ## Force a Network Response
 *
 * In some situations, such as after a user clicks a 'refresh' button, it may be necessary to skip
 * the cache, and fetch data directly from the server. To force a full refresh, add the `no-cache`
 * directive:
 *
 * ```java
 * Request request = new Request.Builder()
 *     .cacheControl(new CacheControl.Builder().noCache().build())
 *     .url("http://publicobject.com/helloworld.txt")

      logger = Logger.getLogger(OkHttpTest::class.java.name)
    }

  private var client: OkHttpClient = clientTestRule.newClient()

  private val moshi =
    Moshi.Builder()
      .add(KotlinJsonAdapterFactory())
      .build()

  private val handshakeCertificates = localhost()

  private lateinit var server: MockWebServer

  @BeforeEach
  fun setup(server: MockWebServer) {

    val response =
      MockResponse()
        .clearHeaders()
        .addHeader("Cookie: s=square")
        .addHeader("Cookies: delicious")
    response.setHeaders(Headers.Builder().add("Cookie", "a=android").build())
    assertThat(headersToList(response)).containsExactly("Cookie: a=android")
  }

  @Test
  fun regularResponse() {
    server.enqueue(MockResponse().setBody("hello world"))