input-remapper: add passthru.tests with nixosTests.input-remapper

pkgs/tools/inputmethods/input-remapper/default.nix

@@ -18,6 +18,7 @@
 , buildPythonApplication
 , procps
 , gtksourceview4
+, nixosTests
   # Change the default log level to debug for easier debugging of package issues
 , withDebugLogLevel ? false
   # Xmodmap is an optional dependency
@@ -146,6 +147,8 @@ buildPythonApplication {
     install -m755 -D -t $out/bin/ bin/input-remapper*
   '';
 
+  passthru.tests = nixosTests.input-remapper;
+
   meta = with lib; {
     description = "An easy to use tool to change the mapping of your input device buttons";
     homepage = "https://github.com/sezanzeb/input-remapper";