Use 'functools.update_wrapper' to preserve attributes from wrapped.

2 files changed, 15 insertions, 11 deletions

diff --git a/pyramid/decorator.py b/pyramid/decorator.py
index 0d17bc398..df30c5e10 100644
--- a/pyramid/decorator.py
+++ b/pyramid/decorator.py
@@ -1,3 +1,6 @@
+import functools
+
+
 class reify(object):
     """ Use as a class method decorator.  It operates almost exactly like the
     Python ``@property`` decorator, but it puts the result of the method it
@@ -26,10 +29,7 @@ class reify(object):
     """
     def __init__(self, wrapped):
         self.wrapped = wrapped
-        try:
-            self.__doc__ = wrapped.__doc__
-        except: # pragma: no cover
-            pass
+        functools.update_wrapper(self, wrapped)
 
     def __get__(self, inst, objtype=None):
         if inst is None:
diff --git a/pyramid/tests/test_decorator.py b/pyramid/tests/test_decorator.py
index 9ab1b7229..eb5266235 100644
--- a/pyramid/tests/test_decorator.py
+++ b/pyramid/tests/test_decorator.py
@@ -15,15 +15,19 @@ class TestReify(unittest.TestCase):
         self.assertEqual(inst.__dict__['wrapped'], 'a')
 
     def test___get__noinst(self):
-        decorator = self._makeOne(None)
+        def wrapped(inst):
+            return 'a'
+        decorator = self._makeOne(wrapped)
         result = decorator.__get__(None)
         self.assertEqual(result, decorator)
 
-    def test___doc__copied(self):
-        def wrapped(inst):
-            """My doc"""
-        decorator = self._makeOne(wrapped)
-        self.assertEqual(decorator.__doc__, "My doc")
-        
+    def test_dunder_attrs_copied(self):
+        from pyramid.util import viewdefaults
+        decorator = self._makeOne(viewdefaults)
+        self.assertEqual(decorator.__doc__, viewdefaults.__doc__)
+        self.assertEqual(decorator.__name__, viewdefaults.__name__)
+        self.assertEqual(decorator.__module__, viewdefaults.__module__)
+
+
 class Dummy(object):
     pass