linux-wallpaperengine: add tests

tests/default.nix

@@ -265,6 +265,7 @@ in import nmtSrc {
     ./modules/services/imapnotify
     ./modules/services/kanshi
     ./modules/services/lieer
+    ./modules/services/linux-wallpaperengine
     ./modules/services/mopidy
     ./modules/services/mpd
     ./modules/services/mpd-mpris

tests/modules/services/linux-wallpaperengine/basic-configuration-expected.service

@@ -0,0 +1,11 @@
+[Install]
+WantedBy=graphical-session.target
+
+[Service]
+ExecStart=@linux-wallpaperengine@/bin/linux-wallpaperengine --assets-dir /some/path/to/assets --clamping border --fps 6 --scaling fit --screen-root HDMI-1 --bg 12345678 --no-audio-processing --noautomute --screen-root DP-1 --silent --scaling fill --fps 12 --bg 87654321
+Restart=on-failure
+
+[Unit]
+After=graphical-session.target
+Description=Implementation of Wallpaper Engine on Linux
+PartOf=graphical-session.target

tests/modules/services/linux-wallpaperengine/basic-configuration.nix

@@ -0,0 +1,35 @@
+{ config, pkgs, ... }:
+
+{
+  services.linux-wallpaperengine = {
+    enable = true;
+    assetsPath = "/some/path/to/assets";
+    clamping = "border";
+    wallpapers = [
+      {
+        monitor = "HDMI-1";
+        wallpaperId = "12345678";
+        scaling = "fit";
+        fps = 6;
+      }
+      {
+        monitor = "DP-1";
+        wallpaperId = "87654321";
+        extraOptions = [ "--scaling fill" "--fps 12" ];
+        audio = {
+          silent = true;
+          automute = false;
+          audio-processing = false;
+        };
+      }
+    ];
+  };
+
+  test.stubs.linux-wallpaperengine = { };
+
+  nmt.script = ''
+    assertFileContent \
+        home-files/.config/systemd/user/linux-wallpaperengine.service \
+        ${./basic-configuration-expected.service}
+  '';
+}

tests/modules/services/linux-wallpaperengine/default.nix

@@ -0,0 +1 @@
+{ linux-wallpaperengine-basic-configuration = ./basic-configuration.nix; }