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TST: assert_produces_warning works with filterwarnings #25721

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Merged
merged 5 commits into from
Mar 19, 2019
Merged

TST: assert_produces_warning works with filterwarnings #25721

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TST: assert_produces_warning works with filterwarnings
TomAugspurger Mar 14, 2019
c05306d
take 2
TomAugspurger Mar 14, 2019
a55659c
handle no warning
TomAugspurger Mar 14, 2019
ff66c6b
remove message
TomAugspurger Mar 14, 2019
3e01ab4
extra warnings option
TomAugspurger Mar 14, 2019
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17 changes: 17 additions & 0 deletions pandas/tests/util/test_assert_produces_warning.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,17 @@
import warnings

import pytest

import pandas.util.testing as tm


def f(a=FutureWarning, b=RuntimeWarning):
warnings.warn('f1', a)
warnings.warn('f2', b)


@pytest.mark.filterwarnings('ignore:f1:FutureWarning')
@pytest.mark.filterwarnings('ignore:f2:RuntimeWarning')
def test_assert_produces_warning_honors_filter():
with tm.assert_produces_warning(RuntimeWarning):
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Shouldn't you be testing the new option here?

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Yes... I've messed something up, sorry.

f()
10 changes: 8 additions & 2 deletions pandas/util/testing.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2584,7 +2584,7 @@ def assert_produces_warning(expected_warning=Warning, filter_level="always",
The type of Exception raised. ``exception.Warning`` is the base
class for all warnings. To check that no warning is returned,
specify ``False`` or ``None``.
filter_level : str, default "always"
filter_level : str or None, default "always"
Specifies whether warnings are ignored, displayed, or turned
into errors.
Valid values are:
Expand All @@ -2597,6 +2597,7 @@ class for all warnings. To check that no warning is returned,
* "module" - print the warning the first time it is generated
from each module
* "once" - print the warning the first time it is generated
* None - do not apply a new filter

clear : str, default None
If not ``None`` then remove any previously raised warnings from
Expand Down Expand Up @@ -2646,7 +2647,12 @@ class for all warnings. To check that no warning is returned,
pass

saw_warning = False
warnings.simplefilter(filter_level)
if expected_warning and filter_level:
warnings.filterwarnings(filter_level, message='',
category=expected_warning)
elif filter_level:
# no expected warnings.
warnings.simplefilter(filter_level)
yield w
extra_warnings = []

Expand Down