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: /lib/python3/dist-packages/twisted/test/ [ drwxr-xr-x ]
name : test_context.py # Copyright (c) Twisted Matrix Laboratories. # See LICENSE for details. """ Tests for L{twisted.python.context}. """ from __future__ import division, absolute_import from twisted.trial.unittest import SynchronousTestCase from twisted.python import context class ContextTests(SynchronousTestCase): """ Tests for the module-scope APIs for L{twisted.python.context}. """ def test_notPresentIfNotSet(self): """ Arbitrary keys which have not been set in the context have an associated value of L{None}. """ self.assertIsNone(context.get("x")) def test_setByCall(self): """ Values may be associated with keys by passing them in a dictionary as the first argument to L{twisted.python.context.call}. """ self.assertEqual(context.call({"x": "y"}, context.get, "x"), "y") def test_unsetAfterCall(self): """ After a L{twisted.python.context.call} completes, keys specified in the call are no longer associated with the values from that call. """ context.call({"x": "y"}, lambda: None) self.assertIsNone(context.get("x")) def test_setDefault(self): """ A default value may be set for a key in the context using L{twisted.python.context.setDefault}. """ key = object() self.addCleanup(context.defaultContextDict.pop, key, None) context.setDefault(key, "y") self.assertEqual("y", context.get(key))