Removed the Requirement to Install Python and NodeJS (Now Bundled with Borealis)

Dependencies/Python/Lib/idlelib/idle_test/test_mainmenu.py

@@ -0,0 +1,42 @@
+"Test mainmenu, coverage 100%."
+# Reported as 88%; mocking turtledemo absence would have no point.
+
+from idlelib import mainmenu
+import re
+import unittest
+
+
+class MainMenuTest(unittest.TestCase):
+
+    def test_menudefs(self):
+        actual = [item[0] for item in mainmenu.menudefs]
+        expect = ['file', 'edit', 'format', 'run', 'shell',
+                  'debug', 'options', 'window', 'help']
+        self.assertEqual(actual, expect)
+
+    def test_default_keydefs(self):
+        self.assertGreaterEqual(len(mainmenu.default_keydefs), 50)
+
+    def test_tcl_indexes(self):
+        # Test tcl patterns used to find menuitem to alter.
+        # On failure, change pattern here and in function(s).
+        # Patterns here have '.*' for re instead of '*' for tcl.
+        for menu, pattern in (
+            ('debug', '.*tack.*iewer'),  # PyShell.debug_menu_postcommand
+            ('options', '.*ode.*ontext'),  # EW.__init__, CodeContext.toggle...
+            ('options', '.*ine.*umbers'),  # EW.__init__, EW.toggle...event.
+            ):
+            with self.subTest(menu=menu, pattern=pattern):
+                for menutup in mainmenu.menudefs:
+                    if menutup[0] == menu:
+                        break
+                else:
+                    self.assertTrue(0, f"{menu} not in menudefs")
+                self.assertTrue(any(re.search(pattern, menuitem[0])
+                                    for menuitem in menutup[1]
+                                    if menuitem is not None),  # Separator.
+                                f"{pattern} not in {menu}")
+
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)