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f4dc9204cc
state of the import system. Also make importlib.invalidate_caches() work with sys.meta_path instead of sys.path_importer_cache to completely separate the path-based import system from the overall import system. Patch by Eric Snow.
103 lines
2.8 KiB
Python
103 lines
2.8 KiB
Python
from importlib import abc
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from importlib import machinery
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import inspect
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import unittest
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class InheritanceTests:
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"""Test that the specified class is a subclass/superclass of the expected
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classes."""
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subclasses = []
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superclasses = []
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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assert self.subclasses or self.superclasses, self.__class__
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self.__test = getattr(abc, self.__class__.__name__)
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def test_subclasses(self):
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# Test that the expected subclasses inherit.
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for subclass in self.subclasses:
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self.assertTrue(issubclass(subclass, self.__test),
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"{0} is not a subclass of {1}".format(subclass, self.__test))
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def test_superclasses(self):
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# Test that the class inherits from the expected superclasses.
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for superclass in self.superclasses:
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self.assertTrue(issubclass(self.__test, superclass),
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"{0} is not a superclass of {1}".format(superclass, self.__test))
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class MetaPathFinder(InheritanceTests, unittest.TestCase):
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superclasses = [abc.Finder]
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subclasses = [machinery.BuiltinImporter, machinery.FrozenImporter,
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machinery.PathFinder, machinery.WindowsRegistryFinder]
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class PathEntryFinder(InheritanceTests, unittest.TestCase):
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superclasses = [abc.Finder]
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subclasses = [machinery.FileFinder]
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class Loader(InheritanceTests, unittest.TestCase):
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subclasses = [abc.PyLoader]
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class ResourceLoader(InheritanceTests, unittest.TestCase):
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superclasses = [abc.Loader]
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class InspectLoader(InheritanceTests, unittest.TestCase):
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superclasses = [abc.Loader]
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subclasses = [abc.PyLoader, machinery.BuiltinImporter,
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machinery.FrozenImporter, machinery.ExtensionFileLoader]
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class ExecutionLoader(InheritanceTests, unittest.TestCase):
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superclasses = [abc.InspectLoader]
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subclasses = [abc.PyLoader]
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class FileLoader(InheritanceTests, unittest.TestCase):
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superclasses = [abc.ResourceLoader, abc.ExecutionLoader]
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subclasses = [machinery.SourceFileLoader, machinery.SourcelessFileLoader]
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class SourceLoader(InheritanceTests, unittest.TestCase):
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superclasses = [abc.ResourceLoader, abc.ExecutionLoader]
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subclasses = [machinery.SourceFileLoader]
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class PyLoader(InheritanceTests, unittest.TestCase):
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superclasses = [abc.Loader, abc.ResourceLoader, abc.ExecutionLoader]
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class PyPycLoader(InheritanceTests, unittest.TestCase):
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superclasses = [abc.PyLoader]
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def test_main():
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from test.support import run_unittest
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classes = []
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for class_ in globals().values():
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if (inspect.isclass(class_) and
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issubclass(class_, unittest.TestCase) and
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issubclass(class_, InheritanceTests)):
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classes.append(class_)
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run_unittest(*classes)
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if __name__ == '__main__':
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test_main()
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