add test_get_instance according to issue #5

test/test_config_provider.py

@@ -44,4 +44,7 @@ class TestConfigProvider(unittest.TestCase):
         expected_dict, self.config.dict,
         'expected_dict musst equal self.config.dict')
       self.assertNotEqual(
-        old_dict, self.config.dict, 'old_dict musst not equal self.config.dict')
\ No newline at end of file
+        old_dict, self.config.dict, 'old_dict musst not equal self.config.dict')
+
+  def test_get_instance(self):
+    self.assertEqual(config_provider.ConfigProvider.getInstance(), self.config)
\ No newline at end of file