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"""Tests for failure loading callback """ from testtools.matchers import GreaterThan import mock from stevedore import extension from stevedore import named from stevedore.tests import utils class TestCallback(utils.TestCase): def test_extension_failure_custom_callback(self): errors = [] def failure_callback(manager, entrypoint, error): errors.append((manager, entrypoint, error)) em = extension.ExtensionManager('stevedore.test.extension', invoke_on_load=True, on_load_failure_callback= failure_callback) extensions = list(em.extensions) self.assertThat(len(extensions), GreaterThan(0)) self.assertEqual(len(errors), 2) for manager, entrypoint, error in errors: self.assertIs(manager, em) self.assertIsInstance(error, (IOError, ImportError)) @mock.patch('stevedore.named.NamedExtensionManager._load_plugins') def test_missing_entrypoints_callback(self, load_fn): errors = set() def callback(names): errors.update(names) load_fn.return_value = [ extension.Extension('foo', None, None, None) ] named.NamedExtensionManager('stevedore.test.extension', names=['foo', 'bar'], invoke_on_load=True, on_missing_entrypoints_callback=callback) self.assertEqual(errors, {'bar'})
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