added code coverage over decorators and removed unneeded functions

tests/unit/common/test_decorators.py

@@ -0,0 +1,50 @@
+# Copyright (c) 2014 Rackspace, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from cdn.common import decorators
+from tests.unit import base
+
+
+class LazyPropertyTest(base.TestCase):
+
+    def test_delete(self):
+        original_value = object()
+        new_value = object()
+
+        class TestClass(object):
+            @decorators.lazy_property(write=True)
+            def var(self):
+                return original_value
+
+        test_class = TestClass()
+        setattr(test_class, 'var', new_value)
+        self.assertEqual(new_value, test_class.var)
+
+        del test_class.var
+        self.assertEqual(original_value, test_class.var)
+
+    def test_set(self):
+        original_value = object()
+        new_value = object()
+
+        class TestClass(object):
+            @decorators.lazy_property(write=True)
+            def var(self):
+                return original_value
+
+        test_class = TestClass()
+        setattr(test_class, 'var', new_value)
+
+        self.assertEqual(new_value, test_class.var)