python3Packages.dicttoxml2: migrate to pyproject, finalAttrs, enable tests (#543655)

pkgs/development/python-modules/dicttoxml2/default.nix

@@ -2,27 +2,30 @@
   lib,
   buildPythonPackage,
   fetchPypi,
+  setuptools,
+  pytestCheckHook,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "dicttoxml2";
   version = "2.1.0";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchPypi {
-    inherit pname version;
+    inherit (finalAttrs) pname version;
     hash = "sha256-Z8tynzN911KAjAIbcMjfijT4S54RGl26o34ADur01GI=";
   };
 
-  # Module has no tests
-  doCheck = false;
+  build-system = [ setuptools ];
 
   pythonImportsCheck = [ "dicttoxml2" ];
 
+  nativeCheckInputs = [ pytestCheckHook ];
+
   meta = {
     description = "Converts a Python dictionary or other native data type into a valid XML string";
     homepage = "https://pypi.org/project/dicttoxml2/";
     license = lib.licenses.gpl2Only;
     maintainers = with lib.maintainers; [ fab ];
   };
-}
+})