Example of using assertRaises as a context manager in the unittest documentation.
diff --git a/Doc/library/unittest.rst b/Doc/library/unittest.rst
index d3b0767..dd0466b 100644
--- a/Doc/library/unittest.rst
+++ b/Doc/library/unittest.rst
@@ -895,12 +895,18 @@
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.