160: DictProxy now checks type of d in __init__(); updated unit tests

ipalib/plugable.py

@@ -484,6 +484,7 @@ class DictProxy(ReadOnly):
         """
         :param d: The ``dict`` instance to proxy.
         """
+        assert type(d) is dict, '`d` must be %r, got %r' % (dict, type(d))
         self.__d = d
         self.__lock__()
         assert self.__islocked__()

ipalib/tests/test_plugable.py

@@ -461,6 +461,8 @@ class test_DictProxy(ClassChecker):
 
     def test_class(self):
         assert self.cls.__bases__ == (plugable.ReadOnly,)
+        for non_dict in ('hello', 69, object):
+            raises(AssertionError, self.cls, non_dict)
 
     def test_DictProxy(self):
         cnt = 10