@Throws(UnknownHostException::class)
  override fun lookup(hostname: String): List<InetAddress> {
    requestedHosts.add(hostname)
    return hostAddresses[hostname] ?: throw UnknownHostException()
  }

  fun assertRequests(vararg expectedHosts: String?) {
    assertThat(requestedHosts).containsExactly(*expectedHosts)
    requestedHosts.clear()
  }

  /** Allocates and returns `count` fake IPv4 addresses like [255.0.0.100, 255.0.0.101].  */

      Request(
        server
          .url("/")
          .newBuilder()
          .host("android.com")
          .build(),
      )
    executeSynchronously(request).assertCode(200)
    dns.assertRequests("android.com")
  }

  @Test
  fun dnsReturnsZeroIpAddresses() {
    // Configure a DNS that returns our local MockWebServer for android.com.
    val dns = FakeDns()