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document toml use of filterwarnings (#7611) 

and include a demo of toml 'literal strings'

Update doc/en/warnings.rst
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Fix linting

Co-authored-by: Bruno Oliveira <nicoddemus@gmail.com>
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Thomas Grainger 2020-08-14 08:08:17 +01:00 committed by GitHub
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@ -68,16 +68,30 @@ them into errors:
FAILED test_show_warnings.py::test_one - UserWarning: api v1, should use ...
1 failed in 0.12s
The same option can be set in the ``pytest.ini`` file using the ``filterwarnings`` ini option.
For example, the configuration below will ignore all user warnings, but will transform
The same option can be set in the ``pytest.ini`` or ``pyproject.toml`` file using the
``filterwarnings`` ini option. For example, the configuration below will ignore all
user warnings and specific deprecation warnings matching a regex, but will transform
all other warnings into errors.
.. code-block:: ini
# pytest.ini
[pytest]
filterwarnings =
error
ignore::UserWarning
ignore:function ham\(\) is deprecated:DeprecationWarning
.. code-block:: toml
# pyproject.toml
[tool.pytest.ini_options]
filterwarnings = [
"error",
"ignore::UserWarning",
# note the use of single quote below to denote "raw" strings in TOML
'ignore:function ham\(\) is deprecated:DeprecationWarning',
]
When a warning matches more than one option in the list, the action for the last matching option