parcellite: add basic test case

modules/services/parcellite.nix

@@ -50,7 +50,7 @@ in {
 
       Service = {
         ExecStart = "${cfg.package}/bin/${cfg.package.pname} ${
-            lib.concatStringsSep " " cfg.extraOptions
+            escapeShellArgs cfg.extraOptions
           }";
         Restart = "on-abort";
       };

tests/default.nix

@@ -185,6 +185,7 @@ import nmt {
     ./modules/services/mpd
     ./modules/services/mpdris2
     ./modules/services/pantalaimon
+    ./modules/services/parcellite
     ./modules/services/pbgopy
     ./modules/services/picom
     ./modules/services/playerctld

tests/modules/services/parcellite/default.nix

@@ -0,0 +1 @@
+{ parcellite = ./parcellite.nix; }

tests/modules/services/parcellite/parcellite-expected.service

@@ -0,0 +1,13 @@
+[Install]
+WantedBy=graphical-session.target
+
+[Service]
+ExecStart=@parcellite@/bin/parcellite '--no-icon'
+Restart=on-abort
+
+[Unit]
+After=graphical-session-pre.target
+After=tray.target
+Description=Lightweight GTK+ clipboard manager
+PartOf=graphical-session.target
+Requires=tray.target

tests/modules/services/parcellite/parcellite.nix

@@ -0,0 +1,18 @@
+{ config, pkgs, ... }:
+
+{
+  services.parcellite = {
+    enable = true;
+    package = config.lib.test.mkStubPackage {
+      name = "parcellite";
+      outPath = "@parcellite@";
+    };
+    extraOptions = [ "--no-icon" ];
+  };
+
+  nmt.script = ''
+    assertFileContent \
+        "home-files/.config/systemd/user/parcellite.service" \
+        ${./parcellite-expected.service}
+  '';
+}