usetex = mpl.rcParams['text.usetex']

linewidth = mpl.rcParams['lines.linewidth']

# test context given dictionary

with mpl.rc_context(rc={'text.usetex': not usetex}):

assert mpl.rcParams['text.usetex'] == (not usetex)

assert mpl.rcParams['text.usetex'] == usetex

# test context given filename (mpl.rc sets linewdith to 33)

with mpl.rc_context(fname=fname):

assert mpl.rcParams['lines.linewidth'] == 33

assert mpl.rcParams['lines.linewidth'] == linewidth

# test context given filename and dictionary

with mpl.rc_context(fname=fname, rc={'lines.linewidth': 44}):

assert mpl.rcParams['lines.linewidth'] == 44

assert mpl.rcParams['lines.linewidth'] == linewidth

# test rc_file

try:

mpl.rc_file(fname)

assert mpl.rcParams['lines.linewidth'] == 33

finally:

rc = mpl.RcParams({'font.cursive': ['Apple Chancery',

'Textile',

'Zapf Chancery',

'cursive'],

'font.family': 'sans-serif',

'font.weight': 'normal',

'font.size': 12})

if six.PY3:

expected_repr = """

'font.weight': 'normal'})""".lstrip()

else:

expected_repr = """

u'font.weight': u'normal'})""".lstrip()

assert_str_equal(expected_repr, repr(rc))

if six.PY3:

expected_str = """

font.weight: normal""".lstrip()

else:

expected_str = """

font.weight: normal""".lstrip()

assert_str_equal(expected_str, str(rc))

# test the find_all functionality

assert ['font.cursive', 'font.size'] == sorted(rc.find_all('i[vz]').keys())

if sys.version_info[:2] < (2, 7):

raise nose.SkipTest("assert_raises as context manager "

"not supported with Python < 2.7")

rc = mpl.RcParams({'figure.figsize': (3.5, 42)})

bad_dict = {'figure.figsize': (3.5, 42, 1)}

# make sure validation happens on input

with assert_raises(ValueError):

with warnings.catch_warnings():

warnings.filterwarnings('ignore',

message='.*(validate)',

category=UserWarning)

if sys.version_info[:2] < (2, 7):

raise nose.SkipTest("assert_raises as context manager "

"not supported with Python < 2.7")

with assert_raises(ValueError):

with warnings.catch_warnings():

warnings.filterwarnings('ignore',

message='.*(validate)',

category=UserWarning)

# Test that it possible to add all values to itself / deepcopy

# This was not possible because validate_bool_maybe_none did not

# accept None as an argument.

# https://github.com/matplotlib/matplotlib/issues/2543

# We filter warnings at this stage since a number of them are raised

# for deprecated rcparams as they should. We dont want these in the

# printed in the test suite.

with warnings.catch_warnings():

warnings.filterwarnings('ignore',

message='.*(deprecated|obsolete)',

category=UserWarning)

with mpl.rc_context():

_copy = mpl.rcParams.copy()

for key in six.iterkeys(_copy):

mpl.rcParams[key] = _copy[key]

mpl.rcParams['text.dvipnghack'] = None

with mpl.rc_context():

from copy import deepcopy

_deep_copy = deepcopy(mpl.rcParams)

# real test is that this does not raise

assert_true(validate_bool_maybe_none(None) is None)

assert_true(validate_bool_maybe_none("none") is None)

_fonttype = mpl.rcParams['svg.fonttype']

assert_true(_fonttype == mpl.rcParams['svg.embed_char_paths'])

with mpl.rc_context():

mpl.rcParams['svg.embed_char_paths'] = False

# only split from above because of the usage of assert_raises

# as a context manager, which only works in 2.7 and above

if sys.version_info[:2] < (2, 7):

raise nose.SkipTest("assert_raises as context manager not supported with Python < 2.7")

from matplotlib.rcsetup import validate_bool_maybe_none, validate_bool

with assert_raises(ValueError):

validate_bool_maybe_none("blah")

with assert_raises(ValueError):

validate_bool(None)

with assert_raises(ValueError):

with mpl.rc_context():

with mpl.rc_context(param_dict):

_, ax = plt.subplots()

ax.plot(range(3), label='test')

leg = ax.legend()

get_func = 'get_facecolor'

rcparam = 'legend.facecolor'

test_values = [({rcparam: 'r'},

mcolors.colorConverter.to_rgba('r')),

({rcparam: 'inherit',

'axes.facecolor': 'r'

},

mcolors.colorConverter.to_rgba('r')),

({rcparam: 'g',

'axes.facecolor': 'r'},

mcolors.colorConverter.to_rgba('g'))

]

for rc_dict, target in test_values:

get_func = 'get_edgecolor'

rcparam = 'legend.edgecolor'

test_values = [({rcparam: 'r'},

mcolors.colorConverter.to_rgba('r')),

({rcparam: 'inherit',

'axes.edgecolor': 'r'

},

mcolors.colorConverter.to_rgba('r')),

({rcparam: 'g',

'axes.facecolor': 'r'},

mcolors.colorConverter.to_rgba('g'))

]

for rc_dict, target in test_values:

utf32_be = os.path.join(os.path.dirname(__file__),

'test_utf32_be_rcparams.rc')

old_lang = os.environ.get('LANG', None)

os.environ['LANG'] = 'en_US.UTF-32-BE'

rc = mpl.rc_params_from_file(utf32_be, True)

if old_lang:

os.environ['LANG'] = old_lang

else:

del os.environ['LANG']

res = validator(arg)

if isinstance(target, np.ndarray):

assert_true(np.all(res == target))

elif not isinstance(target, Cycler):

assert_equal(res, target)

else:

# Cyclers can't simply be asserted equal. They don't implement __eq__

if sys.version_info[:2] < (2, 7):

raise nose.SkipTest("assert_raises as context manager not "

"supported with Python < 2.7")

with assert_raises(exception_type):

validation_tests = (

{'validator': validate_bool,

'success': chain(((_, True) for _ in

('t', 'y', 'yes', 'on', 'true', '1', 1, True)),

((_, False) for _ in

('f', 'n', 'no', 'off', 'false', '0', 0, False))),

'fail': ((_, ValueError)

for _ in ('aardvark', 2, -1, [], ))},

{'validator': validate_stringlist,

'success': (('', []),

('a,b', ['a', 'b']),

('aardvark', ['aardvark']),

('aardvark, ', ['aardvark']),

('aardvark, ,', ['aardvark']),

(['a', 'b'], ['a', 'b']),

(('a', 'b'), ['a', 'b']),

(iter(['a', 'b']), ['a', 'b']),

(np.array(['a', 'b']), ['a', 'b']),

((1, 2), ['1', '2']),

(np.array([1, 2]), ['1', '2']),

),

'fail': ((dict(), ValueError),

(1, ValueError),

)

},

{'validator': validate_nseq_int(2),

'success': ((_, [1, 2])

for _ in ('1, 2', [1.5, 2.5], [1, 2],

(1, 2), np.array((1, 2)))),

'fail': ((_, ValueError)

for _ in ('aardvark', ('a', 1),

(1, 2, 3)

))

},

{'validator': validate_nseq_float(2),

'success': ((_, [1.5, 2.5])

for _ in ('1.5, 2.5', [1.5, 2.5], [1.5, 2.5],

(1.5, 2.5), np.array((1.5, 2.5)))),

'fail': ((_, ValueError)

for _ in ('aardvark', ('a', 1),

(1, 2, 3)

))

},

{'validator': validate_cycler,

'success': (('cycler("color", "rgb")',

cycler("color", 'rgb')),

(cycler('linestyle', ['-', '--']),

cycler('linestyle', ['-', '--'])),

("""(cycler("color", ["r", "g", "b"]) +

cycler("mew", [2, 3, 5]))""",

(cycler("color", 'rgb') +

cycler("markeredgewidth", [2, 3, 5]))),

("cycler(c='rgb', lw=[1, 2, 3])",

cycler('color', 'rgb') + cycler('linewidth', [1, 2, 3])),

("cycler('c', 'rgb') * cycler('linestyle', ['-', '--'])",

(cycler('color', 'rgb') *

cycler('linestyle', ['-', '--']))),

),

# This is *so* incredibly important: validate_cycler() eval's

# an arbitrary string! I think I have it locked down enough,

# and that is what this is testing.

# TODO: Note that these tests are actually insufficient, as it may

# be that they raised errors, but still did an action prior to

# raising the exception. We should devise some additional tests

# for that...

'fail': ((4, ValueError), # Gotta be a string or Cycler object

('cycler("bleh, [])', ValueError), # syntax error

('Cycler("linewidth", [1, 2, 3])',

ValueError), # only 'cycler()' function is allowed

('1 + 2', ValueError), # doesn't produce a Cycler object

('os.system("echo Gotcha")', ValueError), # os not available

('import os', ValueError), # should not be able to import

('def badjuju(a): return a; badjuju(cycler("color", "rgb"))',

ValueError), # Should not be able to define anything

# even if it does return a cycler

('cycler("waka", [1, 2, 3])', ValueError), # not a property

('cycler(c=[1, 2, 3])', ValueError), # invalid values

("cycler(lw=['a', 'b', 'c'])", ValueError), # invalid values

)

},

{'validator': validate_hatch,

'success': (('--|', '--|'), ('\\oO', '\\oO'),

('/+*/.x', '/+*/.x'), ('', '')),

'fail': (('--_', ValueError),

(8, ValueError),

('X', ValueError)),

},

{'validator': validate_colorlist,

'success': (('r,g,b', ['r', 'g', 'b']),

(['r', 'g', 'b'], ['r', 'g', 'b']),

('r, ,', ['r']),

(['', 'g', 'blue'], ['g', 'blue']),

([np.array([1, 0, 0]), np.array([0, 1, 0])],

np.array([[1, 0, 0], [0, 1, 0]])),

(np.array([[1, 0, 0], [0, 1, 0]]),

np.array([[1, 0, 0], [0, 1, 0]])),

),

'fail': (('fish', ValueError),

),

}

)

for validator_dict in validation_tests:

validator = validator_dict['validator']

for arg, target in validator_dict['success']:

yield _validation_test_helper, validator, arg, target

for arg, error_type in validator_dict['fail']:

# There was previously a bug that meant that if rc_context failed and

# raised an exception due to issues in the supplied rc parameters, the

# global rc parameters were left in a modified state.

if sys.version_info[:2] >= (2, 7):

from collections import OrderedDict

else:

raise SkipTest("Test can only be run in Python >= 2.7 as it requires OrderedDict")

with mpl.rc_context(rc={'text.usetex': False}):

assert mpl.rcParams['text.usetex'] is False

with assert_raises(KeyError):

with mpl.rc_context(rc=OrderedDict([('text.usetex', True),('test.blah', True)])):

pass