/usr/lib/python2.7/dist-packages/seaborn/tests/test_rcmod.py is in python-seaborn 0.4.0-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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import matplotlib as mpl
from distutils.version import LooseVersion
import nose
import matplotlib.pyplot as plt
import nose.tools as nt
import numpy.testing as npt
from .. import rcmod
class RCParamTester(object):
def flatten_list(self, orig_list):
iter_list = map(np.atleast_1d, orig_list)
flat_list = [item for sublist in iter_list for item in sublist]
return flat_list
def assert_rc_params(self, params):
for k, v in params.items():
if k == "svg.embed_char_paths":
# This param causes test issues and is deprecated anyway
continue
elif isinstance(v, np.ndarray):
npt.assert_array_equal(mpl.rcParams[k], v)
else:
nt.assert_equal((k, mpl.rcParams[k]), (k, v))
class TestAxesStyle(RCParamTester):
styles = ["white", "dark", "whitegrid", "darkgrid", "ticks"]
def test_default_return(self):
current = rcmod.axes_style()
self.assert_rc_params(current)
def test_key_usage(self):
_style_keys = set(rcmod._style_keys)
for style in self.styles:
nt.assert_true(not set(rcmod.axes_style(style)) ^ _style_keys)
def test_bad_style(self):
with nt.assert_raises(ValueError):
rcmod.axes_style("i_am_not_a_style")
def test_rc_override(self):
rc = {"axes.facecolor": "blue", "foo.notaparam": "bar"}
out = rcmod.axes_style("darkgrid", rc)
nt.assert_equal(out["axes.facecolor"], "blue")
nt.assert_not_in("foo.notaparam", out)
def test_set_style(self):
for style in self.styles:
style_dict = rcmod.axes_style(style)
rcmod.set_style(style)
self.assert_rc_params(style_dict)
def test_style_context_manager(self):
rcmod.set_style("darkgrid")
orig_params = rcmod.axes_style()
with rcmod.axes_style("whitegrid"):
context_params = rcmod.axes_style("whitegrid")
self.assert_rc_params(context_params)
self.assert_rc_params(orig_params)
def test_style_context_independence(self):
nt.assert_true(set(rcmod._style_keys) ^ set(rcmod._context_keys))
def test_set_rc(self):
rcmod.set(rc={"lines.linewidth": 4})
nt.assert_equal(mpl.rcParams["lines.linewidth"], 4)
rcmod.set()
def test_reset_defaults(self):
# Changes to the rc parameters make this test hard to manage
# on older versions of matplotlib, so we'll skip it
if LooseVersion(mpl.__version__) < LooseVersion("1.3"):
raise nose.SkipTest
rcmod.reset_defaults()
self.assert_rc_params(mpl.rcParamsDefault)
rcmod.set()
def test_reset_orig(self):
# Changes to the rc parameters make this test hard to manage
# on older versions of matplotlib, so we'll skip it
if LooseVersion(mpl.__version__) < LooseVersion("1.3"):
raise nose.SkipTest
rcmod.reset_orig()
self.assert_rc_params(mpl.rcParamsOrig)
rcmod.set()
class TestPlottingContext(RCParamTester):
contexts = ["paper", "notebook", "talk", "poster"]
def test_default_return(self):
current = rcmod.plotting_context()
self.assert_rc_params(current)
def test_key_usage(self):
_context_keys = set(rcmod._context_keys)
for context in self.contexts:
missing = set(rcmod.plotting_context(context)) ^ _context_keys
nt.assert_true(not missing)
def test_bad_context(self):
with nt.assert_raises(ValueError):
rcmod.plotting_context("i_am_not_a_context")
def test_font_scale(self):
notebook_ref = rcmod.plotting_context("notebook")
notebook_big = rcmod.plotting_context("notebook", 2)
font_keys = ["axes.labelsize", "axes.titlesize", "legend.fontsize",
"xtick.labelsize", "ytick.labelsize"]
for k in font_keys:
nt.assert_equal(notebook_ref[k] * 2, notebook_big[k])
def test_rc_override(self):
key, val = "grid.linewidth", 5
rc = {key: val, "foo": "bar"}
out = rcmod.plotting_context("talk", rc=rc)
nt.assert_equal(out[key], val)
nt.assert_not_in("foo", out)
def test_set_context(self):
for context in self.contexts:
context_dict = rcmod.plotting_context(context)
rcmod.set_context(context)
self.assert_rc_params(context_dict)
def test_context_context_manager(self):
rcmod.set_context("notebook")
orig_params = rcmod.plotting_context()
with rcmod.plotting_context("paper"):
context_params = rcmod.plotting_context("paper")
self.assert_rc_params(context_params)
self.assert_rc_params(orig_params)
class TestFonts(object):
def test_set_font(self):
rcmod.set(font="Verdana")
_, ax = plt.subplots()
ax.set_xlabel("foo")
try:
nt.assert_equal(ax.xaxis.label.get_fontname(),
"Verdana")
except AssertionError:
if has_verdana():
raise
else:
raise nose.SkipTest("Verdana font is not present")
finally:
rcmod.set()
plt.close("all")
def test_set_serif_font(self):
rcmod.set(font="serif")
_, ax = plt.subplots()
ax.set_xlabel("foo")
nt.assert_in(ax.xaxis.label.get_fontname(),
mpl.rcParams["font.serif"])
rcmod.set()
plt.close("all")
def test_different_sans_serif(self):
if LooseVersion(mpl.__version__) < LooseVersion("1.4"):
raise nose.SkipTest
rcmod.set()
rcmod.set_style(rc={"font.sans-serif":
["Verdana"]})
_, ax = plt.subplots()
ax.set_xlabel("foo")
try:
nt.assert_equal(ax.xaxis.label.get_fontname(),
"Verdana")
except AssertionError:
if has_verdana():
raise
else:
raise nose.SkipTest("Verdana font is not present")
finally:
rcmod.set()
plt.close("all")
def has_verdana():
"""Helper to verify if Verdana font is present"""
# This import is relatively lengthy, so to prevent its import for
# testing other tests in this module not requiring this knowledge,
# import font_manager here
import matplotlib.font_manager as mplfm
try:
verdana_font = mplfm.findfont('Verdana', fallback_to_default=False)
except:
# if https://github.com/matplotlib/matplotlib/pull/3435
# gets accepted
return False
# otherwise check if not matching the logic for a 'default' one
try:
unlikely_font = mplfm.findfont("very_unlikely_to_exist1234",
fallback_to_default=False)
except:
# if matched verdana but not unlikely, Verdana must exist
return True
# otherwise -- if they match, must be the same default
return verdana_font != unlikely_font
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