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.Raises(ome):
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:
+ the_exception = cm.exc_value
+ self.assertEquals(the_exception.error_code, 3)
Added the ability to use :meth:`assertRaises` as a context manager.