diff -r 601a08fcb507 Lib/idlelib/idle_test/test_configuration.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Lib/idlelib/idle_test/test_configuration.py	Sun Jun 15 11:24:08 2014 +0530
@@ -0,0 +1,103 @@
+"""Unittests to ensure correctness of defualt config files"""
+import unittest
+from test.support import requires, _is_gui_available
+import re
+from idlelib.configHandler import idleConf as conf
+import tkinter as tk
+
+class DefaultConfigTest(unittest.TestCase):
+
+    def get_option(self, option, _type='int'):
+        return conf.defaultCfg[self.cfgtype].Get(self.section, option, _type)
+
+    def test_config_main(self):
+        get = self.get_option
+        self.cfgtype = 'main'
+
+        self.section = 'General'
+        self.assertIn(get('editor-on-startup', 'bool'), (True, False))
+        self.assertIn(get('autosave', 'bool'), (True, False))
+        self.assertNotEqual(get('print-command-posix', 'str').strip(), '')
+        self.assertNotEqual(get('print-command-win', 'str').strip(), '')
+        self.assertIn(get('delete-exitfunc', 'bool'), (True, False))
+
+        self.section = 'EditorWindow'
+        self.assertGreater(get('width'), 0)
+        self.assertGreater(get('height'), 0)
+        self.assertNotEqual(get('font', 'str').strip(), '')
+        self.assertGreater(get('font-size'), 0)
+        self.assertIn(get('font-bold', 'bool'), (True, False))
+
+        self.section = 'Indent'
+        self.assertIn(get('use-spaces', 'bool'), (True, False))
+        self.assertGreater(get('num-spaces'), 0)
+
+        self.section = 'Theme'
+        self.assertIn(get('default', 'bool'), (True, False))
+        if get('default'):
+            self.assertNotEqual(get('name', 'str').strip(), '')
+
+        self.section = 'Keys'
+        self.assertIn(get('default', 'bool'), (True, False))
+        if get('default'):
+            self.assertNotEqual(get('name', 'str').strip(), '')
+
+        self.section = 'History'
+        self.assertIn(get('cyclic', 'bool'), (True, False))
+
+    def test_config_highlight(self):
+
+        def is_valid_hex_color(colorcode):
+            m = re.match(r'^#([0-9a-f]{3,12})$', color, re.IGNORECASE)
+            return m is not None and len(m.group(1)) % 3 == 0
+
+        def is_valid_color_name(colorname):
+            # list of colors which are always present in tkinter
+            colors = ("white", "black", "red", "green",
+                      "blue", "cyan", "yellow", "magenta")
+            if colorname in colors:
+                return True
+            requires('gui')
+            try:
+                return tk.Tk().winfo_rgb(colorname) is not None
+            except:
+                return False
+
+        get = self.get_option
+        self.cfgtype = 'highlight'
+        sections = conf.GetSectionList('default', self.cfgtype)
+
+        for s in sections:
+            options = conf.defaultCfg[self.cfgtype].GetOptionList(s)
+            self.section = s
+            for option in options:
+                color = get(option, 'str')
+                if color.startswith('#'):
+                    self.assertTrue(is_valid_hex_color(color),
+                    "{} in {} in config-highlight.def has an invalid"
+                    "color code {}.".format(option, self.section, color))
+                elif _is_gui_available():
+                    self.assertTrue(is_valid_color_name(color),
+                    "{} in {} in config-highlight.def has an invalid"
+                    "color name {}.".format(option, self.section, color))
+
+    def test_config_extensions(self):
+        get = self.get_option
+        self.cfgtype = 'extensions'
+        sections = conf.GetSectionList('default', self.cfgtype)
+
+        for s in sections:
+            options = conf.defaultCfg[self.cfgtype].GetOptionList(s)
+            self.section = s
+            for option in options:
+                if option is 'enable':
+                    self.assertIn(get(option, 'bool'), (True, False))
+                if 'bindings' in self.section.lower():
+                    pass  # todo - validate key binding.
+                else:
+                    self.assertNotEqual(get(option, 'str').strip(), '',
+                        "{} in {} in config-extensions.def has an empty "
+                        "config value.".format(option, self.section))
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)