Lib/test/test_importlib/extension/test_finder.py

from .. import abc
from .. import util as test_util
from . import util

machinery = test_util.import_importlib('importlib.machinery')

import unittest
import warnings

# XXX find_spec tests

class FinderTests(abc.FinderTests):

    """Test the finder for extension modules."""

    def find_module(self, fullname):
        importer = self.machinery.FileFinder(util.PATH,
                                            (self.machinery.ExtensionFileLoader,
                                             self.machinery.EXTENSION_SUFFIXES))
        with warnings.catch_warnings():
            warnings.simplefilter('ignore', DeprecationWarning)
            return importer.find_module(fullname)

    def test_module(self):
        self.assertTrue(self.find_module(util.NAME))

    # No extension module as an __init__ available for testing.
    test_package = test_package_in_package = None

    # No extension module in a package available for testing.
    test_module_in_package = None

    # Extension modules cannot be an __init__ for a package.
    test_package_over_module = None

    def test_failure(self):
        self.assertIsNone(self.find_module('asdfjkl;'))

Frozen_FinderTests, Source_FinderTests = test_util.test_both(
        FinderTests, machinery=machinery)


if __name__ == '__main__':
    unittest.main()