Issue #20640: Add tests for idlelib.configHelpSourceEdit.

Patch by Saimadhav Heblikar.

Lib/idlelib/idle_test/test_config_help.py

@@ -0,0 +1,106 @@
+"""Unittests for idlelib.configHelpSourceEdit"""
+import unittest
+from idlelib.idle_test.mock_tk import Var, Mbox, Entry
+from idlelib import configHelpSourceEdit as help_dialog_module
+
+help_dialog = help_dialog_module.GetHelpSourceDialog
+
+
+class Dummy_help_dialog:
+    # Mock for testing the following methods of help_dialog
+    menu_ok = help_dialog.menu_ok
+    path_ok = help_dialog.path_ok
+    ok = help_dialog.ok
+    cancel = help_dialog.cancel
+    # Attributes, constant or variable, needed for tests
+    menu = Var()
+    entryMenu = Entry()
+    path = Var()
+    entryPath = Entry()
+    result = None
+    destroyed = False
+
+    def destroy(self):
+        self.destroyed = True
+
+
+# menu_ok and path_ok call Mbox.showerror if menu and path are not ok.
+orig_mbox = help_dialog_module.tkMessageBox
+showerror = Mbox.showerror
+
+
+class ConfigHelpTest(unittest.TestCase):
+    dialog = Dummy_help_dialog()
+
+    @classmethod
+    def setUpClass(cls):
+        help_dialog_module.tkMessageBox = Mbox
+
+    @classmethod
+    def tearDownClass(cls):
+        help_dialog_module.tkMessageBox = orig_mbox
+
+    def test_blank_menu(self):
+        self.dialog.menu.set('')
+        self.assertFalse(self.dialog.menu_ok())
+        self.assertEqual(showerror.title, 'Menu Item Error')
+        self.assertIn('No', showerror.message)
+
+    def test_long_menu(self):
+        self.dialog.menu.set('hello' * 10)
+        self.assertFalse(self.dialog.menu_ok())
+        self.assertEqual(showerror.title, 'Menu Item Error')
+        self.assertIn('long', showerror.message)
+
+    def test_good_menu(self):
+        self.dialog.menu.set('help')
+        showerror.title = 'No Error'  # should not be called
+        self.assertTrue(self.dialog.menu_ok())
+        self.assertEqual(showerror.title, 'No Error')
+
+    def test_blank_path(self):
+        self.dialog.path.set('')
+        self.assertFalse(self.dialog.path_ok())
+        self.assertEqual(showerror.title, 'File Path Error')
+        self.assertIn('No', showerror.message)
+
+    def test_invalid_file_path(self):
+        self.dialog.path.set('foobar' * 100)
+        self.assertFalse(self.dialog.path_ok())
+        self.assertEqual(showerror.title, 'File Path Error')
+        self.assertIn('not exist', showerror.message)
+
+    def test_invalid_url_path(self):
+        self.dialog.path.set('ww.foobar.com')
+        self.assertFalse(self.dialog.path_ok())
+        self.assertEqual(showerror.title, 'File Path Error')
+        self.assertIn('not exist', showerror.message)
+
+        self.dialog.path.set('htt.foobar.com')
+        self.assertFalse(self.dialog.path_ok())
+        self.assertEqual(showerror.title, 'File Path Error')
+        self.assertIn('not exist', showerror.message)
+
+    def test_good_path(self):
+        self.dialog.path.set('https://docs.python.org')
+        showerror.title = 'No Error'  # should not be called
+        self.assertTrue(self.dialog.path_ok())
+        self.assertEqual(showerror.title, 'No Error')
+
+    def test_ok(self):
+        self.dialog.destroyed = False
+        self.dialog.menu.set('help')
+        self.dialog.path.set('https://docs.python.org')
+        self.dialog.ok()
+        self.assertEqual(self.dialog.result, ('help',
+                                              'https://docs.python.org'))
+        self.assertTrue(self.dialog.destroyed)
+
+    def test_cancel(self):
+        self.dialog.destroyed = False
+        self.dialog.cancel()
+        self.assertEqual(self.dialog.result, None)
+        self.assertTrue(self.dialog.destroyed)
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2, exit=False)