nim-codex/tests/codex/testnat.nim

import std/[unittest, options, net],stew/shims/net as stewNet
import pkg/chronos
import pkg/libp2p/[multiaddress, multihash, multicodec]
import pkg/stew/results

import ../../codex/nat
import ../../codex/utils/natutils
import ../../codex/utils


suite "NAT Address Tests":
  test "nattedAddress with local addresses":
    # Setup test data
    let
      udpPort = Port(1234)
      natConfig = NatConfig(
        hasExtIp: true, 
        extIp: parseIpAddress("8.8.8.8"))
      
      # Create test addresses
      localAddr = MultiAddress.init("/ip4/127.0.0.1/tcp/5000").expect("valid multiaddr")
      anyAddr = MultiAddress.init("/ip4/0.0.0.0/tcp/5000").expect("valid multiaddr")
      publicAddr = MultiAddress.init("/ip4/192.168.1.1/tcp/5000").expect("valid multiaddr")

    # Expected results
    let 
      expectedDiscoveryAddrs = @[
      MultiAddress.init("/ip4/8.8.8.8/udp/1234").expect("valid multiaddr"),
      MultiAddress.init("/ip4/8.8.8.8/udp/1234").expect("valid multiaddr"),
      MultiAddress.init("/ip4/8.8.8.8/udp/1234").expect("valid multiaddr")
      ]
      expectedlibp2pAddrs = @[
      MultiAddress.init("/ip4/8.8.8.8/tcp/5000").expect("valid multiaddr"),
      MultiAddress.init("/ip4/8.8.8.8/tcp/5000").expect("valid multiaddr"),
      MultiAddress.init("/ip4/8.8.8.8/tcp/5000").expect("valid multiaddr")
      ]

      #ipv6Addr = MultiAddress.init("/ip6/::1/tcp/5000").expect("valid multiaddr")
      addrs = @[localAddr, anyAddr, publicAddr]
    
    # Test address remapping
    let (libp2pAddrs,discoveryAddrs) = nattedAddress(natConfig, addrs, udpPort)
    
    # Verify results
    check(discoveryAddrs == expectedDiscoveryAddrs)
    check(libp2pAddrs == expectedlibp2pAddrs)