tests/mako: add a deprecation test

Make sure old criteria still works

tests/modules/services/mako/default.nix

@@ -1 +1,4 @@
-{ mako-example-config = ./example-config.nix; }
+{
+  mako-example-config = ./example-config.nix;
+  mako-deprecated-criteria = ./deprecated-criteria.nix;
+}

tests/modules/services/mako/deprecated-criteria.nix

@@ -0,0 +1,65 @@
+{
+  services.mako = {
+    enable = true;
+    # Global settings
+    settings = {
+      actions = true;
+      anchor = "top-right";
+      background-color = "#000000";
+      border-color = "#FFFFFF";
+      border-radius = 0;
+      default-timeout = 0;
+      font = "monospace 10";
+      height = 100;
+      width = 300;
+      icons = true;
+      ignore-timeout = false;
+      layer = "top";
+      margin = 10;
+      markup = true;
+    };
+
+    # Using deprecated criteria option
+    criteria = {
+      "actionable=true" = {
+        anchor = "top-left";
+      };
+      "app-name=Google\\ Chrome" = {
+        max-visible = 5;
+      };
+      "field1=value field2=value" = {
+        text-alignment = "left";
+      };
+    };
+  };
+
+  test.asserts.warnings.expected = [
+    ''
+      The option `services.mako.criteria` is deprecated and will be removed in a future release.
+      Please use `services.mako.settings` with nested attributes instead.
+
+      For example, instead of:
+        criteria = {
+          "actionable=true" = {
+            anchor = "top-left";
+          };
+        };
+
+      Use:
+        settings = {
+          # Global settings here...
+
+          # Criteria sections
+          "actionable=true" = {
+            anchor = "top-left";
+          };
+        };
+    ''
+  ];
+
+  nmt.script = ''
+    assertFileExists home-files/.config/mako/config
+    assertFileContent home-files/.config/mako/config \
+    ${./config}
+  '';
+}