add test cases for show_stop_warning decorator option

gooey/tests/test_application.py

@@ -1,5 +1,8 @@
 import unittest
 from argparse import ArgumentParser
+from collections import namedtuple
+from unittest.mock import patch
+from unittest.mock import MagicMock
 
 from tests.harness import instrumentGooey
 
@@ -15,6 +18,45 @@ class TestGooeyApplication(unittest.TestCase):
                 with instrumentGooey(parser, fullscreen=shouldShow) as (app, gapp):
                     self.assertEqual(gapp.IsFullScreen(), shouldShow)
 
+
+    @patch("gui.containers.application.modals.confirmForceStop")
+    def testGooeyRequestsConfirmationWhenShowStopWarningModalTrue(self, mockModal):
+        """
+        When show_stop_warning=False, Gooey should immediately kill the
+        running program without additional user confirmation.
+
+        Otherwise, Gooey should show a confirmation modal and, dependending on the
+        user's choice, either do nothing or kill the running program.
+        """
+        Case = namedtuple('Case', ['show_warning', 'shouldSeeConfirm', 'userChooses', 'shouldHaltProgram'])
+        testcases = [
+            Case(show_warning=True, shouldSeeConfirm=True, userChooses=True, shouldHaltProgram=True),
+            Case(show_warning=True, shouldSeeConfirm=True, userChooses=False, shouldHaltProgram=False),
+            Case(show_warning=False, shouldSeeConfirm=False, userChooses='N/A', shouldHaltProgram=True),
+        ]
+
+        for case in testcases:
+            mockModal.reset_mock()
+            parser = self.basicParser()
+            with instrumentGooey(parser, show_stop_warning=case.show_warning) as (app, gapp):
+                mockClientRunner = MagicMock()
+                mockModal.return_value = case.userChooses
+                gapp.clientRunner = mockClientRunner
+
+                gapp.onStopExecution()
+
+                if case.shouldSeeConfirm:
+                    mockModal.assert_called()
+                else:
+                    mockModal.assert_not_called()
+
+                if case.shouldHaltProgram:
+                    mockClientRunner.stop.assert_called()
+                else:
+                    mockClientRunner.stop.assert_not_called()
+
+
+
     def basicParser(self):
         parser = ArgumentParser()
         parser.add_argument('--foo')