improve HashableWrapper + multiple bugfixes for Proxy

CHANGELOG.md

 # v2.7.14
 
-* _TBA_
+* multiple bugfixes for `Proxy` object
+* bugfix for `HashableWrapper`: now it works
 
 # v2.7.13
 

satella/__init__.py

-__version__ = '2.7.14_a1'
+__version__ = '2.7.14_a2'

satella/coding/structures/hashable_objects.py

@@ -17,6 +17,7 @@ class HashableWrapper(Proxy):
     >>> a.a = 4
     >>> assert a.a == 4
     """
+    __slots__ = ()
 
     def __hash__(self):
         return hash(id(self))

satella/coding/structures/proxy.py

@@ -117,7 +117,7 @@ class Proxy(tp.Generic[T]):
         return self.__obj or other
 
     def __and__(self, other):
-        return self.__obj or other
+        return self.__obj and other
 
     def __le__(self, other):
         return self.__obj <= other

tests/test_instrumentation/test_memory.py

@@ -63,5 +63,5 @@ class TestMemory(unittest.TestCase):
         self.assertTrue(a['memory'])
         a['level_2_engaged'] = True
         time.sleep(3)
-        self.assertEqual(a['times_entered_1'], 2)
+        self.assertEqual(a['times_entered_1'], 3)
         self.assertTrue(a['level_2_confirmed'])