tests: Update PythonQtTestCleanup to test alternative cleanup order

This adds a new test to PythonQtTestCleanup to verify behavior when
Python is finalized before PythonQt cleanup is called.

Author: jcfr

tests/PythonQtTestCleanup.cpp

@@ -89,6 +89,15 @@ void PythonQtTestCleanup::testSignalReceiverCleanup()
     ));
 }
 
+void PythonQtTestCleanup::testPyFinalizeThenPythonQtCleanup()
+{
+  if (Py_IsInitialized()) {
+      Py_Finalize();
+  }
+
+  PythonQt::cleanup();
+}
+
 bool PythonQtTestCleanupHelper::runScript(const char* script)
 {
   _passed = false;

tests/PythonQtTestCleanup.h

@@ -20,6 +20,7 @@ private Q_SLOTS:
   void testCallQtMethodInDestructorOwnedQTimer();
   void testCallQtMethodInDestructorWeakRefGuarded();
   void testSignalReceiverCleanup();
+  void testPyFinalizeThenPythonQtCleanup();
 
 private:
   PythonQtTestCleanupHelper* _helper;