vicinae: Add tests for old vicinae version

tests/modules/programs/vicinae/default.nix

@@ -1,4 +1,5 @@
 { lib, pkgs, ... }:
 lib.optionalAttrs (pkgs.stdenv.hostPlatform.isLinux) {
+  vicinae-pre17-settings = ./pre17-settings.nix;
   vicinae-example-settings = ./example-settings.nix;
 }

tests/modules/programs/vicinae/example-settings.nix

@@ -8,7 +8,7 @@
   programs.vicinae = {
     enable = true;
     systemd.enable = true;
-
+    useLayerShell = false;
     settings = {
       faviconService = "twenty";
       font = {
@@ -80,6 +80,10 @@
     ];
   };
 
+  test.asserts.assertions.expected = [
+    ''After version 0.17, if you want to explicitly disable the use of layer shell, you need to set {option}.programs.vicinae.settings.launcher_window.layer_shell.enabled = false.''
+  ];
+
   nmt.script = ''
     assertFileExists      "home-files/.config/vicinae/settings.json"
     assertFileExists      "home-files/.config/systemd/user/vicinae.service"

tests/modules/programs/vicinae/pre17-settings.nix

@@ -0,0 +1,46 @@
+{
+  pkgs,
+  config,
+  ...
+}:
+
+{
+  programs.vicinae = {
+    enable = true;
+    systemd.enable = true;
+    package = pkgs.stdenv.mkDerivation {
+      pname = "fake-vicinae";
+      version = "0.10.0";
+      src = pkgs.emptyFile;
+      buildCommand = "mkdir -p $out";
+      meta = {
+        mainProgram = "vicinae";
+      };
+    };
+
+    settings = {
+      faviconService = "twenty";
+      font = {
+        size = 10;
+      };
+      popToRootOnClose = false;
+      rootSearch = {
+        searchFiles = false;
+      };
+      theme = {
+        name = "vicinae-dark";
+      };
+      window = {
+        csd = true;
+        opacity = 0.95;
+        rounding = 10;
+      };
+    };
+  };
+
+  nmt.script = ''
+    assertFileExists      "home-files/.config/vicinae/vicinae.json"
+    assertFileExists      "home-files/.config/systemd/user/vicinae.service"
+    assertFileContains     "home-files/.config/systemd/user/vicinae.service"  "EnvironmentFile"
+  '';
+}