polybar: add test case

tests/default.nix

@@ -50,6 +50,7 @@ import nmt {
     ./modules/programs/firefox
     ./modules/programs/getmail
     ./modules/programs/rofi
+    ./modules/services/polybar
     ./modules/services/sxhkd
     ./modules/services/window-managers/i3
     ./modules/systemd

tests/modules/services/polybar/basic-configuration.conf

@@ -0,0 +1,21 @@
+[bar/top]
+height=3%
+modules-center=date
+monitor=${env:MONITOR:eDP1}
+radius=0
+width=100%
+
+[module/date]
+date=%d.%m.%y
+internal=5
+label=%time%  %date%
+time=%H:%M
+type=internal/date
+
+[module/date]
+type = internal/date
+interval = 5
+date = "%d.%m.%y"
+time = %H:%M
+format-prefix-foreground = ${colors.foreground-alt}
+label = %time%  %date%

tests/modules/services/polybar/basic-configuration.nix

@@ -0,0 +1,48 @@
+{ config, pkgs, ... }:
+
+{
+  config = {
+    services.polybar = {
+      enable = true;
+      package = pkgs.writeScriptBin "dummy-polybar" "";
+      script = "polybar bar &";
+      config = {
+        "bar/top" = {
+          monitor = "\${env:MONITOR:eDP1}";
+          width = "100%";
+          height = "3%";
+          radius = 0;
+          modules-center = "date";
+        };
+        "module/date" = {
+          type = "internal/date";
+          internal = 5;
+          date = "%d.%m.%y";
+          time = "%H:%M";
+          label = "%time%  %date%";
+        };
+      };
+      extraConfig = ''
+        [module/date]
+        type = internal/date
+        interval = 5
+        date = "%d.%m.%y"
+        time = %H:%M
+        format-prefix-foreground = ''${colors.foreground-alt}
+        label = %time%  %date%
+      '';
+    };
+
+    nmt.script = ''
+      local serviceFile=home-files/.config/systemd/user/polybar.service
+
+      assertFileExists $serviceFile
+      assertFileRegex $serviceFile 'X-Restart-Triggers=.*polybar\.conf'
+      assertFileRegex $serviceFile 'ExecStart=.*/bin/polybar-start'
+
+      assertFileExists home-files/.config/polybar/config
+      assertFileContent home-files/.config/polybar/config \
+          ${./basic-configuration.conf}
+    '';
+  };
+}

tests/modules/services/polybar/default.nix

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