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Copy pathtest_style.py
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145 lines (114 loc) · 4.45 KB
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from __future__ import (absolute_import, division, print_function,
unicode_literals)
import os
import shutil
import tempfile
import warnings
from collections import OrderedDict
from contextlib import contextmanager
import pytest
import matplotlib as mpl
from matplotlib import style
from matplotlib.style.core import USER_LIBRARY_PATHS, STYLE_EXTENSION
import six
PARAM = 'image.cmap'
VALUE = 'pink'
DUMMY_SETTINGS = {PARAM: VALUE}
@contextmanager
def temp_style(style_name, settings=None):
"""Context manager to create a style sheet in a temporary directory."""
if not settings:
settings = DUMMY_SETTINGS
temp_file = '%s.%s' % (style_name, STYLE_EXTENSION)
# Write style settings to file in the temp directory.
tempdir = tempfile.mkdtemp()
with open(os.path.join(tempdir, temp_file), 'w') as f:
for k, v in six.iteritems(settings):
f.write('%s: %s' % (k, v))
# Add temp directory to style path and reload so we can access this style.
USER_LIBRARY_PATHS.append(tempdir)
style.reload_library()
try:
yield
finally:
shutil.rmtree(tempdir)
style.reload_library()
def test_deprecated_rc_warning_includes_filename():
SETTINGS = {'axes.color_cycle': 'ffffff'}
basename = 'color_cycle'
with warnings.catch_warnings(record=True) as warns:
with temp_style(basename, SETTINGS):
# style.reload_library() in temp_style() triggers the warning
pass
for w in warns:
assert basename in str(w.message)
def test_available():
with temp_style('_test_', DUMMY_SETTINGS):
assert '_test_' in style.available
def test_use():
mpl.rcParams[PARAM] = 'gray'
with temp_style('test', DUMMY_SETTINGS):
with style.context('test'):
assert mpl.rcParams[PARAM] == VALUE
@pytest.mark.network
def test_use_url():
with temp_style('test', DUMMY_SETTINGS):
with style.context('https://gist.github.com/adrn/6590261/raw'):
assert mpl.rcParams['axes.facecolor'] == "#adeade"
def test_context():
mpl.rcParams[PARAM] = 'gray'
with temp_style('test', DUMMY_SETTINGS):
with style.context('test'):
assert mpl.rcParams[PARAM] == VALUE
# Check that this value is reset after the exiting the context.
assert mpl.rcParams[PARAM] == 'gray'
def test_context_with_dict():
original_value = 'gray'
other_value = 'blue'
mpl.rcParams[PARAM] = original_value
with style.context({PARAM: other_value}):
assert mpl.rcParams[PARAM] == other_value
assert mpl.rcParams[PARAM] == original_value
def test_context_with_dict_after_namedstyle():
# Test dict after style name where dict modifies the same parameter.
original_value = 'gray'
other_value = 'blue'
mpl.rcParams[PARAM] = original_value
with temp_style('test', DUMMY_SETTINGS):
with style.context(['test', {PARAM: other_value}]):
assert mpl.rcParams[PARAM] == other_value
assert mpl.rcParams[PARAM] == original_value
def test_context_with_dict_before_namedstyle():
# Test dict before style name where dict modifies the same parameter.
original_value = 'gray'
other_value = 'blue'
mpl.rcParams[PARAM] = original_value
with temp_style('test', DUMMY_SETTINGS):
with style.context([{PARAM: other_value}, 'test']):
assert mpl.rcParams[PARAM] == VALUE
assert mpl.rcParams[PARAM] == original_value
def test_context_with_union_of_dict_and_namedstyle():
# Test dict after style name where dict modifies the a different parameter.
original_value = 'gray'
other_param = 'text.usetex'
other_value = True
d = {other_param: other_value}
mpl.rcParams[PARAM] = original_value
mpl.rcParams[other_param] = (not other_value)
with temp_style('test', DUMMY_SETTINGS):
with style.context(['test', d]):
assert mpl.rcParams[PARAM] == VALUE
assert mpl.rcParams[other_param] == other_value
assert mpl.rcParams[PARAM] == original_value
assert mpl.rcParams[other_param] == (not other_value)
def test_context_with_badparam():
original_value = 'gray'
other_value = 'blue'
d = OrderedDict([(PARAM, original_value), ('badparam', None)])
with style.context({PARAM: other_value}):
assert mpl.rcParams[PARAM] == other_value
x = style.context([d])
with pytest.raises(KeyError):
with x:
pass
assert mpl.rcParams[PARAM] == other_value