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| -rw-r--r-- | Doc/library/unittest.rst | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/Doc/library/unittest.rst b/Doc/library/unittest.rst index d3b0767aae..dd0466b7d7 100644 --- a/Doc/library/unittest.rst +++ b/Doc/library/unittest.rst @@ -895,12 +895,18 @@ Test cases If *callable* is omitted or None, returns a context manager so that the code under test can be written inline rather than as a function:: - with self.failUnlessRaises(some_error_class): + with self.assertRaises(SomeException): do_something() The context manager will store the caught exception object in its :attr:`exc_value` attribute. This can be useful if the intention - is to perform additional checks on the exception raised. + is to perform additional checks on the exception raised:: + + with self.assertRaises(SomeException) as cm: + do_something() + + the_exception = cm.exc_value + self.assertEquals(the_exception.error_code, 3) .. versionchanged:: 2.7 Added the ability to use :meth:`assertRaises` as a context manager. |