Issue #15767: Add an explicit test for raising ModuleNotFoundError
when None in sys.modules.
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@ -26,6 +26,13 @@ class APITest(unittest.TestCase):
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with self.assertRaises(ModuleNotFoundError):
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util.import_('some module that does not exist')
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def test_raises_ModuleNotFoundError_for_None(self):
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# None in sys.modules should raise ModuleNotFoundError.
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with importlib_test_util.uncache('not_here'):
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sys.modules['not_here'] = None
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with self.assertRaises(ModuleNotFoundError):
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util.import_('not_here')
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def test_name_requires_rparition(self):
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# Raise TypeError if a non-string is passed in for the module name.
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with self.assertRaises(TypeError):
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