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

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

@@ -0,0 +1,84 @@
+"Test , coverage 17%."
+
+from idlelib import iomenu
+import unittest
+from test.support import requires
+from tkinter import Tk
+from idlelib.editor import EditorWindow
+from idlelib import util
+from idlelib.idle_test.mock_idle import Func
+
+# Fail if either tokenize.open and t.detect_encoding does not exist.
+# These are used in loadfile and encode.
+# Also used in pyshell.MI.execfile and runscript.tabnanny.
+from tokenize import open, detect_encoding
+# Remove when we have proper tests that use both.
+
+
+class IOBindingTest(unittest.TestCase):
+
+    @classmethod
+    def setUpClass(cls):
+        requires('gui')
+        cls.root = Tk()
+        cls.root.withdraw()
+        cls.editwin = EditorWindow(root=cls.root)
+        cls.io = iomenu.IOBinding(cls.editwin)
+
+    @classmethod
+    def tearDownClass(cls):
+        cls.io.close()
+        cls.editwin._close()
+        del cls.editwin
+        cls.root.update_idletasks()
+        for id in cls.root.tk.call('after', 'info'):
+            cls.root.after_cancel(id)  # Need for EditorWindow.
+        cls.root.destroy()
+        del cls.root
+
+    def test_init(self):
+        self.assertIs(self.io.editwin, self.editwin)
+
+    def test_fixnewlines_end(self):
+        eq = self.assertEqual
+        io = self.io
+        fix = io.fixnewlines
+        text = io.editwin.text
+
+        # Make the editor temporarily look like Shell.
+        self.editwin.interp = None
+        shelltext = '>>> if 1'
+        self.editwin.get_prompt_text = Func(result=shelltext)
+        eq(fix(), shelltext)  # Get... call and '\n' not added.
+        del self.editwin.interp, self.editwin.get_prompt_text
+
+        text.insert(1.0, 'a')
+        eq(fix(), 'a'+io.eol_convention)
+        eq(text.get('1.0', 'end-1c'), 'a\n')
+        eq(fix(), 'a'+io.eol_convention)
+
+
+def _extension_in_filetypes(extension):
+    return any(
+        f'*{extension}' in filetype_tuple[1]
+        for filetype_tuple in iomenu.IOBinding.filetypes
+    )
+
+
+class FiletypesTest(unittest.TestCase):
+    def test_python_source_files(self):
+        for extension in util.py_extensions:
+            with self.subTest(extension=extension):
+                self.assertTrue(
+                    _extension_in_filetypes(extension)
+                )
+
+    def test_text_files(self):
+        self.assertTrue(_extension_in_filetypes('.txt'))
+
+    def test_all_files(self):
+        self.assertTrue(_extension_in_filetypes(''))
+
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)