Add test case: what if there's a directory in defaults

The goal of the directory name is to be before foo and bar

cdist/test/cdist_type/__init__.py

@@ -153,3 +153,10 @@ class TypeTestCase(test.CdistTestCase):
         self.assertFalse('optional2' in cdist_type.parameter_defaults)
         self.assertEqual(cdist_type.parameter_defaults['optional1'], 'value1')
 
+    def test_directory_in_default(self):
+        base_path = fixtures
+        cdist_type = core.CdistType(base_path, '__directory_in_default')
+        self.assertEqual(
+            list(sorted(cdist_type.parameter_defaults.keys())),
+            ['bar', 'foo']
+        )

cdist/test/cdist_type/fixtures/__directory_in_default/parameter/optional

@@ -0,0 +1,2 @@
+foo
+bar