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Incorporating feedback from asottile

This commit is contained in:
Arel Cordero 2019-02-02 01:57:17 +00:00
parent 8a1afe4213
commit 7ec1a1407a
1 changed files with 11 additions and 3 deletions
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doc/en/example/parametrize.rst
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@ -569,7 +569,7 @@ Use :func:`pytest.raises` with the
:ref:`pytest.mark.parametrize ref` decorator to write parametrized tests :ref:`pytest.mark.parametrize ref` decorator to write parametrized tests
in which some tests raise exceptions and others do not. in which some tests raise exceptions and others do not.
It is helpful to define a context manager ``does_not_raise`` to serve It is helpful to define a no-op context manager ``does_not_raise`` to serve
as a complement to ``raises``. For example:: as a complement to ``raises``. For example::
from contextlib import contextmanager from contextlib import contextmanager
@ -594,7 +594,15 @@ as a complement to ``raises``. For example::
In the example above, the first three test cases should run unexceptionally, In the example above, the first three test cases should run unexceptionally,
while the fourth should raise ``ZeroDivisionError``. while the fourth should raise ``ZeroDivisionError``.
In Python 3.7+, you can simply use ``nullcontext`` to define If you're only supporting Python 3.7+, you can simply use ``nullcontext``
``does_not_raise``:: to define ``does_not_raise``::
from contextlib import nullcontext as does_not_raise from contextlib import nullcontext as does_not_raise
Or, if you're supporting Python 3.3+ you can use::
from contextlib import ExitStack as does_not_raise
Or, if desired, you can ``pip install contextlib2`` and use::
from contextlib2 import ExitStack as does_not_raise