def make_object(cls, **attrs):
"""Make an object for testing and assign some members.
+ This method creates a new subclass to allow arbitrary attribute
+ reassignment, which is not otherwise possible with objects having __slots__.
+
:param attrs: dict of attributes to set on the new object.
:return: A newly initialized object of type cls.
"""
- obj = cls()
+
+ class TestObject(cls):
+ """Class that inherits from the given class, but without __slots__.
+
+ Note that classes with __slots__ can't have arbitrary attributes monkey-
+ patched in, so this is a class that is exactly the same only with a
+ __dict__ instead of __slots__.
+ """
+ pass
+
+ obj = TestObject()
for name, value in attrs.iteritems():
setattr(obj, name, value)
return obj