tag: T?,
) = apply {
  if (tag == null) {
    if (tags.isNotEmpty()) {
      (tags as MutableMap).remove(type)
    }
  } else {
    val mutableTags: MutableMap<KClass<*>, Any> =
      when {
        tags.isEmpty() -> mutableMapOf<KClass<*>, Any>().also { tags = it }
        else -> tags as MutableMap<KClass<*>, Any>
      }
    mutableTags[type] = tag
  }
}

import assertk.assertThat
import assertk.assertions.containsExactly
import java.net.InetAddress
import java.net.UnknownHostException
import okio.Buffer

class FakeDns : Dns {
  private val hostAddresses: MutableMap<String, List<InetAddress>> = mutableMapOf()
  private val requestedHosts: MutableList<String> = mutableListOf()
  private var nextAddress = 0xff000064L // 255.0.0.100 in IPv4; ::ff00:64 in IPv6.

    return object : CookieHandler() {
      override fun put(
        uri: URI?,
        responseHeaders: MutableMap<String, MutableList<String>>?,
      ) = TODO()

      override fun get(
        uri: URI?,
        requestHeaders: MutableMap<String, MutableList<String>>?,
      ): MutableMap<String, MutableList<String>> = TODO()
    }
  }

  private fun newInterceptorChain(): Interceptor.Chain {

/**
 * Tests how each code point is encoded and decoded in the context of each URL component.
 *
 * This supports [HttpUrlTest].
 */
class UrlComponentEncodingTester private constructor() {
  private val encodings: MutableMap<Int, Encoding> = LinkedHashMap()

  private fun allAscii(encoding: Encoding) =
    apply {
      for (i in 0..127) {
        encodings[i] = encoding
      }
    }

  fun override(
    encoding: Encoding,