nixpkgs/nixos/tests/avahi.nix

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# Test whether `avahi-daemon' and `libnss-mdns' work as expected.
import ./make-test.nix {
nodes = {
one =
{ config, pkgs, ... }: {
services.avahi.enable = true;
services.avahi.nssmdns = true;
};
two =
{ config, pkgs, ... }: {
services.avahi.enable = true;
services.avahi.nssmdns = true;
};
};
testScript =
'' startAll;
# mDNS.
$one->waitForUnit("network.target");
$one->succeed("avahi-resolve-host-name one.local | tee out >&2");
$one->succeed("test \"`cut -f1 < out`\" = one.local");
$one->succeed("avahi-resolve-host-name two.local | tee out >&2");
$one->succeed("test \"`cut -f1 < out`\" = two.local");
$two->waitForUnit("network.target");
$two->succeed("avahi-resolve-host-name one.local | tee out >&2");
$two->succeed("test \"`cut -f1 < out`\" = one.local");
$two->succeed("avahi-resolve-host-name two.local | tee out >&2");
$two->succeed("test \"`cut -f1 < out`\" = two.local");
# Basic DNS-SD.
$one->succeed("avahi-browse -r -t _workstation._tcp | tee out >&2");
$one->succeed("test `wc -l < out` -gt 0");
$two->succeed("avahi-browse -r -t _workstation._tcp | tee out >&2");
$two->succeed("test `wc -l < out` -gt 0");
# More DNS-SD.
$one->execute("avahi-publish -s \"This is a test\" _test._tcp 123 one=1 &");
$one->sleep(5);
$two->succeed("avahi-browse -r -t _test._tcp | tee out >&2");
$two->succeed("test `wc -l < out` -gt 0");
# NSS-mDNS.
$one->succeed("getent hosts one.local >&2");
$one->succeed("getent hosts two.local >&2");
$two->succeed("getent hosts one.local >&2");
$two->succeed("getent hosts two.local >&2");
'';
}