Test that a warning is triggered when *callable* is called with any
positional or keyword arguments that are also passed to
:meth:`assertWarns`. The test passes if *warning* is triggered and
- fails if it isn't. Also, any unexpected exception is an error.
+ fails if it isn't. Any exception is an error.
To catch any of a group of warnings, a tuple containing the warning
classes may be passed as *warnings*.
If only the *warning* and possibly the *msg* arguments are given,
- returns a context manager so that the code under test can be written
+ return a context manager so that the code under test can be written
inline rather than as a function::
with self.assertWarns(SomeWarning):
:attr:`warning` attribute, and the source line which triggered the
warnings in the :attr:`filename` and :attr:`lineno` attributes.
This can be useful if the intention is to perform additional checks
- on the exception raised::
+ on the warning caught::
with self.assertWarns(SomeWarning) as cm:
do_something()