nilsandClaude Sonnet 5.5
96e5b7b859
Add an IPv4 helper lib (parse, netmask, cidr, overlap) and derive router.lans.<name>.ipv4.subnet from address and prefixLength instead of requiring it twice. New assertions reject invalid addresses, DHCP pools that are reversed, outside the subnet or contain the router address, and overlapping LANs. Add `lib` unit tests and an `assertions` check that evaluates broken configs and compares the exact error messages. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
61 lines
2.4 KiB
Nix
61 lines
2.4 KiB
Nix
# Unit tests for modules/router/lib.nix, run at evaluation time.
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{ pkgs }:
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let
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inherit (pkgs) lib;
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r = import ../modules/router/lib.nix { inherit lib; };
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inherit (r) ipv4;
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ip = ipv4.parse;
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failures = lib.runTests {
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testParse = { expr = ip "192.168.10.1"; expected = 3232238081; };
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testParseZero = { expr = ip "0.0.0.0"; expected = 0; };
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testParseMax = { expr = ip "255.255.255.255"; expected = 4294967295; };
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testParseBadOctet = { expr = ip "192.168.10.256"; expected = null; };
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testParseShort = { expr = ip "192.168.10"; expected = null; };
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testParseJunk = { expr = ip "192.168.10.x"; expected = null; };
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testFormatRoundTrip = { expr = ipv4.format (ip "10.20.30.40"); expected = "10.20.30.40"; };
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testFormatZero = { expr = ipv4.format 0; expected = "0.0.0.0"; };
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testNetMask24 = { expr = ipv4.format (ipv4.netMask 24); expected = "255.255.255.0"; };
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testNetMask20 = { expr = ipv4.format (ipv4.netMask 20); expected = "255.255.240.0"; };
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testNetMask8 = { expr = ipv4.format (ipv4.netMask 8); expected = "255.0.0.0"; };
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testCidr24 = { expr = ipv4.cidr "192.168.10.77" 24; expected = "192.168.10.0/24"; };
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testCidr20 = { expr = ipv4.cidr "172.16.37.1" 20; expected = "172.16.32.0/20"; };
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testCidr30 = { expr = ipv4.cidr "10.0.0.6" 30; expected = "10.0.0.4/30"; };
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testInSubnetYes = {
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expr = ipv4.inSubnet { address = ip "192.168.10.1"; prefixLength = 24; } (ip "192.168.10.200");
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expected = true;
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};
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testInSubnetNo = {
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expr = ipv4.inSubnet { address = ip "192.168.10.1"; prefixLength = 24; } (ip "192.168.11.1");
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expected = false;
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};
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testOverlapNested = {
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expr = ipv4.overlaps
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{ address = ip "10.0.0.1"; prefixLength = 8; }
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{ address = ip "10.1.2.3"; prefixLength = 24; };
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expected = true;
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};
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testOverlapSame = {
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expr = ipv4.overlaps
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{ address = ip "192.168.10.1"; prefixLength = 24; }
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{ address = ip "192.168.10.9"; prefixLength = 24; };
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expected = true;
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};
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testOverlapDisjoint = {
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expr = ipv4.overlaps
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{ address = ip "192.168.10.1"; prefixLength = 24; }
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{ address = ip "192.168.11.1"; prefixLength = 24; };
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expected = false;
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};
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};
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in
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pkgs.runCommand "router-lib-tests" { } (
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if failures == [ ] then
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"touch $out"
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else
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''
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echo ${lib.escapeShellArg (lib.generators.toPretty { } failures)} >&2
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exit 1
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''
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)
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