Issue #28572: Add 10% to coverage of IDLE's test_configdialog.

Update and augment description of the configuration system.

Lib/idlelib/idle_test/test_configdialog.py

@@ -1,30 +1,123 @@
-'''Test idlelib.configdialog.
+"""Test idlelib.configdialog.
 
-Coverage: 46% just by creating dialog.
-The other half is code for working with user customizations.
-'''
-from idlelib.configdialog import ConfigDialog  # always test import
+Half the class creates dialog, half works with user customizations.
+Coverage: 46% just by creating dialog, 56% with current tests.
+"""
+from idlelib.configdialog import ConfigDialog, idleConf  # test import
 from test.support import requires
 requires('gui')
 from tkinter import Tk
 import unittest
+import idlelib.config as config
 
-class ConfigDialogTest(unittest.TestCase):
+# Tests should not depend on fortuitous user configurations.
+# They must not affect actual user .cfg files.
+# Use solution from test_config: empty parsers with no filename.
+usercfg = idleConf.userCfg
+testcfg = {
+    'main': config.IdleUserConfParser(''),
+    'highlight': config.IdleUserConfParser(''),
+    'keys': config.IdleUserConfParser(''),
+    'extensions': config.IdleUserConfParser(''),
+}
 
-    @classmethod
-    def setUpClass(cls):
-        cls.root = Tk()
-        cls.root.withdraw()
+# ConfigDialog.changedItems is a 3-level hierarchical dictionary of
+# pending changes that mirrors the multilevel user config dict.
+# For testing, record args in a list for comparison with expected.
+changes = []
+class TestDialog(ConfigDialog):
+    def AddChangedItem(self, *args):
+        changes.append(args)
 
-    @classmethod
-    def tearDownClass(cls):
-        cls.root.update_idletasks()
-        cls.root.destroy()
-        del cls.root
+def setUpModule():
+    global root, configure
+    idleConf.userCfg = testcfg
+    root = Tk()
+    root.withdraw()
+    configure = TestDialog(root, 'Test', _utest=True)
 
-    def test_configdialog(self):
-        d = ConfigDialog(self.root, 'Test', _utest=True)
-        d.remove_var_callbacks()
+
+def tearDownModule():
+    global root, configure
+    idleConf.userCfg = testcfg
+    configure.remove_var_callbacks()
+    del configure
+    root.update_idletasks()
+    root.destroy()
+    del root
+
+
+class FontTabTest(unittest.TestCase):
+
+
+    def setUp(self):
+        changes.clear()
+
+    def test_font(self):
+        configure.fontName.set('Test Font')
+        expected = [
+            ('main', 'EditorWindow', 'font', 'Test Font'),
+            ('main', 'EditorWindow', 'font-size', '10'),
+            ('main', 'EditorWindow', 'font-bold', False)]
+        self.assertEqual(changes, expected)
+        changes.clear()
+        configure.fontSize.set(12)
+        expected = [
+            ('main', 'EditorWindow', 'font', 'Test Font'),
+            ('main', 'EditorWindow', 'font-size', '12'),
+            ('main', 'EditorWindow', 'font-bold', False)]
+        self.assertEqual(changes, expected)
+        changes.clear()
+        configure.fontBold.set(True)
+        expected = [
+            ('main', 'EditorWindow', 'font', 'Test Font'),
+            ('main', 'EditorWindow', 'font-size', '12'),
+            ('main', 'EditorWindow', 'font-bold', True)]
+        self.assertEqual(changes, expected)
+
+    #def test_sample(self): pass  # TODO
+
+    def test_tabspace(self):
+        configure.spaceNum.set(6)
+        self.assertEqual(changes, [('main', 'Indent', 'num-spaces', 6)])
+
+
+class HighlightTest(unittest.TestCase):
+
+    def setUp(self):
+        changes.clear()
+
+    #def test_colorchoose(self): pass  # TODO
+
+
+class KeysTest(unittest.TestCase):
+
+    def setUp(self):
+        changes.clear()
+
+
+class GeneralTest(unittest.TestCase):
+
+    def setUp(self):
+        changes.clear()
+
+    def test_startup(self):
+        configure.radioStartupEdit.invoke()
+        self.assertEqual(changes,
+                         [('main', 'General', 'editor-on-startup', 1)])
+
+    def test_autosave(self):
+        configure.radioSaveAuto.invoke()
+        self.assertEqual(changes, [('main', 'General', 'autosave', 1)])
+
+    def test_editor_size(self):
+        configure.entryWinHeight.insert(0, '1')
+        self.assertEqual(changes, [('main', 'EditorWindow', 'height', '140')])
+        changes.clear()
+        configure.entryWinWidth.insert(0, '1')
+        self.assertEqual(changes, [('main', 'EditorWindow', 'width', '180')])
+
+    #def test_help_sources(self): pass  # TODO
 
 
 if __name__ == '__main__':