Testing that rule declarations are mapped to the proper chains depending
   on src and dest options.
   
   -- Testcase --
   {%
           include("./root/usr/share/firewall4/main.uc", {
                   getenv: function(varname) {
                           switch (varname) {
                           case 'ACTION':
                                  return 'print';
                          }
                  }
          })
  %}
  -- End --
  
  -- File uci/helpers.json --
  {}
  -- End --
  
  -- File uci/firewall.json --
  {
          "rule": [
                  {
                          ".description": "Neither source, nor dest => should result in an output rule",
                          "proto": "any"
                  },
                  {
                          ".description": "Source any, no dest => should result in an input rule",
                          "proto": "any",
                          "src": "*"
                  },
                  {
                          ".description": "Dest any, no source => should result in an output rule",
                          "proto": "any",
                          "dest": "*"
                  },
                  {
                          ".description": "Source any, dest any => should result in a forward rule",
                          "proto": "any",
                          "src": "*",
                          "dest": "*"
                  }
          ]
  }
  -- End --
  
  -- Expect stdout --
  table inet fw4
  flush table inet fw4
  
  table inet fw4 {
          #
          # Defines
          #
  
  
          #
          # User includes
          #
  
          include "/etc/nftables.d/*.nft"
  
  
          #
          # Filter rules
          #
  
          chain input {
                  type filter hook input priority filter; policy drop;
  
                  iif "lo" accept comment "!fw4: Accept traffic from loopback"
  
                  ct state vmap { established : accept, related : accept } comment "!fw4: Handle inbound flows"
                  counter comment "!fw4: @rule[1]"
          }
  
          chain forward {
                  type filter hook forward priority filter; policy drop;
  
                  ct state vmap { established : accept, related : accept } comment "!fw4: Handle forwarded flows"
                  counter comment "!fw4: @rule[3]"
          }
  
          chain output {
                  type filter hook output priority filter; policy drop;
  
                  oif "lo" accept comment "!fw4: Accept traffic towards loopback"
  
                  ct state vmap { established : accept, related : accept } comment "!fw4: Handle outbound flows"
                  counter comment "!fw4: @rule[0]"
                  counter comment "!fw4: @rule[2]"
          }
  
          chain prerouting {
                  type filter hook prerouting priority filter; policy accept;
          }
  
          chain handle_reject {
                 meta l4proto tcp reject with tcp reset comment "!fw4: Reject TCP traffic"
                 reject with icmpx type port-unreachable comment "!fw4: Reject any other traffic"
         }
 
 
         #
         # NAT rules
         #
 
         chain dstnat {
                 type nat hook prerouting priority dstnat; policy accept;
         }
 
         chain srcnat {
                 type nat hook postrouting priority srcnat; policy accept;
         }
 
 
         #
         # Raw rules (notrack)
         #
 
         chain raw_prerouting {
                 type filter hook prerouting priority raw; policy accept;
         }
 
         chain raw_output {
                 type filter hook output priority raw; policy accept;
         }
 
 
         #
         # Mangle rules
         #
 
         chain mangle_prerouting {
                 type filter hook prerouting priority mangle; policy accept;
         }
 
         chain mangle_postrouting {
                 type filter hook postrouting priority mangle; policy accept;
         }
 
         chain mangle_input {
                 type filter hook input priority mangle; policy accept;
         }
 
         chain mangle_output {
                 type route hook output priority mangle; policy accept;
         }
 
         chain mangle_forward {
                 type filter hook forward priority mangle; policy accept;
         }
 }
 -- End --

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