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: /lib/python3/dist-packages/twisted/internet/test/ [ drwxr-xr-x ]
name : test_glibbase.py # Copyright (c) Twisted Matrix Laboratories. # See LICENSE for details. """ Tests for twisted.internet.glibbase. """ from __future__ import division, absolute_import import sys from twisted.trial.unittest import TestCase from twisted.internet._glibbase import ensureNotImported class EnsureNotImportedTests(TestCase): """ L{ensureNotImported} protects against unwanted past and future imports. """ def test_ensureWhenNotImported(self): """ If the specified modules have never been imported, and import prevention is requested, L{ensureNotImported} makes sure they will not be imported in the future. """ modules = {} self.patch(sys, "modules", modules) ensureNotImported(["m1", "m2"], "A message.", preventImports=["m1", "m2", "m3"]) self.assertEqual(modules, {"m1": None, "m2": None, "m3": None}) def test_ensureWhenNotImportedDontPrevent(self): """ If the specified modules have never been imported, and import prevention is not requested, L{ensureNotImported} has no effect. """ modules = {} self.patch(sys, "modules", modules) ensureNotImported(["m1", "m2"], "A message.") self.assertEqual(modules, {}) def test_ensureWhenFailedToImport(self): """ If the specified modules have been set to L{None} in C{sys.modules}, L{ensureNotImported} does not complain. """ modules = {"m2": None} self.patch(sys, "modules", modules) ensureNotImported(["m1", "m2"], "A message.", preventImports=["m1", "m2"]) self.assertEqual(modules, {"m1": None, "m2": None}) def test_ensureFailsWhenImported(self): """ If one of the specified modules has been previously imported, L{ensureNotImported} raises an exception. """ module = object() modules = {"m2": module} self.patch(sys, "modules", modules) e = self.assertRaises(ImportError, ensureNotImported, ["m1", "m2"], "A message.", preventImports=["m1", "m2"]) self.assertEqual(modules, {"m2": module}) self.assertEqual(e.args, ("A message.",))