assertThat(selection.routes.map { it.socketAddress.address }).containsExactly(
      ipv6_1,
      ipv4_1,
      ipv6_2,
      ipv4_2,
    )
  }

  @Test fun getHostString() {
    // Name proxy specification.
    var socketAddress = InetSocketAddress.createUnresolved("host", 1234)
    assertThat(socketAddress.socketHost).isEqualTo("host")