nixos tests: add logrotate test

make sure the service is enabled by default and works.

nixos/tests/all-tests.nix

@@ -268,6 +268,7 @@ in
   litestream = handleTest ./litestream.nix {};
   locate = handleTest ./locate.nix {};
   login = handleTest ./login.nix {};
+  logrotate = handleTest ./logrotate.nix {};
   loki = handleTest ./loki.nix {};
   lxd = handleTest ./lxd.nix {};
   lxd-image = handleTest ./lxd-image.nix {};

nixos/tests/logrotate.nix

@@ -0,0 +1,35 @@
+# Test logrotate service works and is enabled by default
+
+import ./make-test-python.nix ({ pkgs, ...} : rec {
+  name = "logrotate";
+  meta = with pkgs.lib.maintainers; {
+    maintainers = [ martinetd ];
+  };
+
+  # default machine
+  machine = { ... }: {
+  };
+
+  testScript =
+    ''
+      with subtest("whether logrotate works"):
+          machine.succeed(
+              # we must rotate once first to create logrotate stamp
+              "systemctl start --wait logrotate.service",
+
+              # wtmp is present in default config.
+              "rm -f /var/log/wtmp*",
+              "echo test > /var/log/wtmp",
+
+              # move into the future and rotate
+              "date -s 'now + 1 month + 1 day'",
+              # systemd will run logrotate from logrotate.timer automatically
+              # on date change, but if we want to wait for it to terminate
+              # it's easier to run again...
+              "systemctl start --wait logrotate.service",
+
+              # check rotate worked
+              "[ -e /var/log/wtmp.1 ]",
+          )
+    '';
+})

pkgs/tools/system/logrotate/default.nix

@@ -1,6 +1,7 @@
 { lib, stdenv, fetchFromGitHub, gzip, popt, autoreconfHook
 , mailutils ? null
 , aclSupport ? true, acl
+, nixosTests
 }:
 
 stdenv.mkDerivation rec {
@@ -25,6 +26,10 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ autoreconfHook ];
   buildInputs = [ popt ] ++ lib.optionals aclSupport [ acl ];
 
+  passthru.tests = {
+    nixos-logrotate = nixosTests.logrotate;
+  };
+
   meta = with lib; {
     homepage = "https://github.com/logrotate/logrotate";
     description = "Rotates and compresses system logs";