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44 lines
1.2 KiB
Python
44 lines
1.2 KiB
Python
import atexit
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import warnings
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from zope.component import getSiteManager
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from zope.interface.registry import Components
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class TestComponents:
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"""
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A helper for providing a sterile registry when testing
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with :mod:`zope.component`.
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Instantiation will install an empty registry that will be returned
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by :func:`zope.component.getSiteManager`.
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"""
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__test__ = False
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instances = set()
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atexit_setup = False
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def __init__(self):
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self.registry = Components('Testing')
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self.old = getSiteManager.sethook(lambda: self.registry)
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self.instances.add(self)
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if not self.__class__.atexit_setup:
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atexit.register(self.atexit)
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self.__class__.atexit_setup = True
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def uninstall(self):
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"""
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Remove the sterile registry and replace it with the one that
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was in place before this :class:`TestComponents` was
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instantiated.
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"""
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getSiteManager.sethook(self.old)
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self.instances.remove(self)
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@classmethod
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def atexit(cls):
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if cls.instances:
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warnings.warn(
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'TestComponents instances not uninstalled by shutdown!'
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)
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