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MNT: put test helper functions into their proper place
1 parent 61eb622 commit e838a25

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3 files changed

+70
-69
lines changed

3 files changed

+70
-69
lines changed

‎lib/matplotlib/cbook.py

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -708,6 +708,9 @@ def is_string_like(obj):
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return False
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return True
710710

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def is_list_like(obj):
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"""Returns whether the obj is iterable and not a string"""
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return not is_string_like(obj) and iterable(obj)
711714

712715
def is_sequence_of_strings(obj):
713716
"""

‎lib/matplotlib/testing/__init__.py

Lines changed: 66 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1,2 +1,68 @@
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from __future__ import (absolute_import, division, print_function,
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unicode_literals)
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from contextlib import contextmanager
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# stolen from pandas
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@contextmanager
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def assert_produces_warning(expected_warning=Warning, filter_level="always",
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clear=None):
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"""
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Context manager for running code that expects to raise (or not raise)
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warnings. Checks that code raises the expected warning and only the
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expected warning. Pass ``False`` or ``None`` to check that it does *not*
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raise a warning. Defaults to ``exception.Warning``, baseclass of all
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Warnings. (basically a wrapper around ``warnings.catch_warnings``).
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>>> import warnings
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>>> with assert_produces_warning():
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... warnings.warn(UserWarning())
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...
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>>> with assert_produces_warning(False):
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... warnings.warn(RuntimeWarning())
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...
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Traceback (most recent call last):
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...
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AssertionError: Caused unexpected warning(s): ['RuntimeWarning'].
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>>> with assert_produces_warning(UserWarning):
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... warnings.warn(RuntimeWarning())
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Traceback (most recent call last):
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...
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AssertionError: Did not see expected warning of class 'UserWarning'.
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..warn:: This is *not* thread-safe.
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"""
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import warnings
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from matplotlib.cbook import is_list_like
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with warnings.catch_warnings(record=True) as w:
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if clear is not None:
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# make sure that we are clearning these warnings
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# if they have happened before
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# to guarantee that we will catch them
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if not is_list_like(clear):
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clear = [clear]
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for m in clear:
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try:
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m.__warningregistry__.clear()
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except:
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pass
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saw_warning = False
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warnings.simplefilter(filter_level)
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yield w
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extra_warnings = []
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for actual_warning in w:
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if (expected_warning and issubclass(actual_warning.category,
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expected_warning)):
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saw_warning = True
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else:
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extra_warnings.append(actual_warning.category.__name__)
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if expected_warning:
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assert saw_warning, ("Did not see expected warning of class %r."
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% expected_warning.__name__)
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assert not extra_warnings, ("Caused unexpected warning(s): %r."
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% extra_warnings)

‎lib/matplotlib/tests/test_labeled_data_unpacking.py

Lines changed: 1 addition & 69 deletions
Original file line numberDiff line numberDiff line change
@@ -19,85 +19,17 @@ def noop(txt, regex):
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assert_regex = noop
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assert_not_regex = noop
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from matplotlib.cbook import is_string_like, iterable
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from contextlib import contextmanager
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from ..testing import assert_produces_warning
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from .. import unpack_labeled_data
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2926

30-
def is_list_like(obj):
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return not is_string_like(obj) and iterable(obj)
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# Notes on testing the plotting functions itself
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# * the individual decorated plotting functions are tested in 'test_axes.py'
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# * that pyplot functions accept a data kwarg is only tested in
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# test_axes.test_pie_linewidth_0
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3832

39-
# stolen from pandas
40-
@contextmanager
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def assert_produces_warning(expected_warning=Warning, filter_level="always",
42-
clear=None):
43-
"""
44-
Context manager for running code that expects to raise (or not raise)
45-
warnings. Checks that code raises the expected warning and only the
46-
expected warning. Pass ``False`` or ``None`` to check that it does *not*
47-
raise a warning. Defaults to ``exception.Warning``, baseclass of all
48-
Warnings. (basically a wrapper around ``warnings.catch_warnings``).
49-
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>>> import warnings
51-
>>> with assert_produces_warning():
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... warnings.warn(UserWarning())
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...
54-
>>> with assert_produces_warning(False):
55-
... warnings.warn(RuntimeWarning())
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...
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Traceback (most recent call last):
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...
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AssertionError: Caused unexpected warning(s): ['RuntimeWarning'].
60-
>>> with assert_produces_warning(UserWarning):
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... warnings.warn(RuntimeWarning())
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Traceback (most recent call last):
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...
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AssertionError: Did not see expected warning of class 'UserWarning'.
65-
66-
..warn:: This is *not* thread-safe.
67-
"""
68-
import warnings
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70-
with warnings.catch_warnings(record=True) as w:
71-
72-
if clear is not None:
73-
# make sure that we are clearning these warnings
74-
# if they have happened before
75-
# to guarantee that we will catch them
76-
if not is_list_like(clear):
77-
clear = [clear]
78-
for m in clear:
79-
try:
80-
m.__warningregistry__.clear()
81-
except:
82-
pass
83-
84-
saw_warning = False
85-
warnings.simplefilter(filter_level)
86-
yield w
87-
extra_warnings = []
88-
for actual_warning in w:
89-
if (expected_warning and issubclass(actual_warning.category,
90-
expected_warning)):
91-
saw_warning = True
92-
else:
93-
extra_warnings.append(actual_warning.category.__name__)
94-
if expected_warning:
95-
assert saw_warning, ("Did not see expected warning of class %r."
96-
% expected_warning.__name__)
97-
assert not extra_warnings, ("Caused unexpected warning(s): %r."
98-
% extra_warnings)
99-
100-
10133
# these two get used in multiple tests, so define them here
10234
@unpack_labeled_data(replace_names=["x", "y"], label_namer="y")
10335
def plot_func(ax, x, y, ls="x", label=None, w="xyz"):

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