# HG changeset patch
# Parent 023e23a400ece6597b22a53a1e0d5abadad2fb2e

diff -r 023e23a400ec Lib/test/test_functools.py
--- a/Lib/test/test_functools.py	Thu Jul 19 19:39:58 2012 +0300
+++ b/Lib/test/test_functools.py	Thu Jul 19 21:59:13 2012 +0300
@@ -756,6 +756,61 @@
             self.assertEqual(square.cache_info().hits, 4)
             self.assertEqual(square.cache_info().misses, 4)
 
+class TestUnbind(unittest.TestCase):
+    unbind = lambda self, obj: functools.unbind(obj)
+
+    class _C:
+        @classmethod
+        def cm(klass, dummy):
+            if dummy == 42:
+                return klass.__qualname__
+            return ''
+
+        @staticmethod
+        def sm():
+            pass
+
+        def m(self):
+            pass
+
+    def test_bound(self):
+        self.assertIs(list.append, self.unbind([].append))
+        self.assertIs(list.__add__, self.unbind([].__add__))
+
+        inst = TestUnbind._C()
+        #self.assertIs(TestUnbind._C.cm, self.unbind(inst.cm))
+        self.assertEqual('TestUnbind._C', self.unbind(inst.cm)(42)) # see below
+        self.assertIs(TestUnbind._C.sm, self.unbind(inst.sm))
+        self.assertIs(TestUnbind._C.m, self.unbind(inst.m))
+        # dict.fromkeys is a classmethod
+        # XXX id(dict.fromkeys) is not a constant, so we can't use assertIs.
+        # we'll just make sure the returned function behaves like fromkeys.
+        self.assertEqual({1 : 2}, self.unbind({3 : 4}.fromkeys)([1], 2))
+
+    def test_unbound(self):
+        self.assertIs(len, self.unbind(len))
+        self.assertIs(list.append, self.unbind(list.append))
+        self.assertIs(list.__add__, self.unbind(list.__add__))
+
+        #self.assertIs(TestUnbind._C.cm, self.unbind(TestUnbind._C.cm))
+        self.assertEqual('TestUnbind._C', self.unbind(TestUnbind._C.cm)(42))
+        self.assertIs(TestUnbind._C.sm, self.unbind(TestUnbind._C.sm))
+        self.assertIs(TestUnbind._C.m, self.unbind(TestUnbind._C.m))
+        # see above
+        self.assertEqual({1 : 2}, self.unbind(dict.fromkeys)([1], 2))
+
+    def test_idempotence(self):
+        self.assertIs(TestUnbind.test_idempotence, 
+                      self.unbind(self.unbind(TestUnbind.test_idempotence))
+        )
+
+    def test_nonfuncs(self):
+        with self.assertRaises(TypeError):
+            self.unbind({})
+        with self.assertRaises(TypeError):
+            self.unbind(functools)
+
+
 def test_main(verbose=None):
     test_classes = (
         TestPartial,
@@ -767,6 +822,7 @@
         TestWraps,
         TestReduce,
         TestLRU,
+        TestUnbind
     )
     support.run_unittest(*test_classes)