/usr/lib/python3/dist-packages/matplotlib/tests/test_backend_ps.py is in python3-matplotlib 2.0.0+dfsg1-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 | # -*- coding: utf-8 -*-
from __future__ import (absolute_import, division, print_function,
unicode_literals)
import io
import re
import numpy as np
import six
import matplotlib
import matplotlib.pyplot as plt
from matplotlib import patheffects
from matplotlib.testing.decorators import cleanup, knownfailureif
needs_ghostscript = knownfailureif(
matplotlib.checkdep_ghostscript()[0] is None,
"This test needs a ghostscript installation")
needs_tex = knownfailureif(
not matplotlib.checkdep_tex(),
"This test needs a TeX installation")
def _test_savefig_to_stringio(format='ps', use_log=False):
fig, ax = plt.subplots()
buffers = [
six.moves.StringIO(),
io.StringIO(),
io.BytesIO()]
if use_log:
ax.set_yscale('log')
ax.plot([1, 2], [1, 2])
ax.set_title("Déjà vu")
for buffer in buffers:
fig.savefig(buffer, format=format)
values = [x.getvalue() for x in buffers]
if six.PY3:
values = [
values[0].encode('ascii'),
values[1].encode('ascii'),
values[2]]
# Remove comments from the output. This includes things that
# could change from run to run, such as the time.
values = [re.sub(b'%%.*?\n', b'', x) for x in values]
assert values[0] == values[1]
assert values[1] == values[2].replace(b'\r\n', b'\n')
for buffer in buffers:
buffer.close()
@cleanup
def test_savefig_to_stringio():
_test_savefig_to_stringio()
@cleanup
@needs_ghostscript
def test_savefig_to_stringio_with_distiller():
matplotlib.rcParams['ps.usedistiller'] = 'ghostscript'
_test_savefig_to_stringio()
@cleanup
@needs_tex
def test_savefig_to_stringio_with_usetex():
matplotlib.rcParams['text.latex.unicode'] = True
matplotlib.rcParams['text.usetex'] = True
_test_savefig_to_stringio()
@cleanup
def test_savefig_to_stringio_eps():
_test_savefig_to_stringio(format='eps')
@cleanup
def test_savefig_to_stringio_eps_afm():
matplotlib.rcParams['ps.useafm'] = True
_test_savefig_to_stringio(format='eps', use_log=True)
@cleanup
@needs_tex
def test_savefig_to_stringio_with_usetex_eps():
matplotlib.rcParams['text.latex.unicode'] = True
matplotlib.rcParams['text.usetex'] = True
_test_savefig_to_stringio(format='eps')
@cleanup
def test_composite_image():
# Test that figures can be saved with and without combining multiple images
# (on a single set of axes) into a single composite image.
X, Y = np.meshgrid(np.arange(-5, 5, 1), np.arange(-5, 5, 1))
Z = np.sin(Y ** 2)
fig = plt.figure()
ax = fig.add_subplot(1, 1, 1)
ax.set_xlim(0, 3)
ax.imshow(Z, extent=[0, 1, 0, 1])
ax.imshow(Z[::-1], extent=[2, 3, 0, 1])
plt.rcParams['image.composite_image'] = True
with io.BytesIO() as ps:
fig.savefig(ps, format="ps")
ps.seek(0)
buff = ps.read()
assert buff.count(six.b(' colorimage')) == 1
plt.rcParams['image.composite_image'] = False
with io.BytesIO() as ps:
fig.savefig(ps, format="ps")
ps.seek(0)
buff = ps.read()
assert buff.count(six.b(' colorimage')) == 2
@cleanup
def test_patheffects():
with matplotlib.rc_context():
matplotlib.rcParams['path.effects'] = [
patheffects.withStroke(linewidth=4, foreground='w')]
fig, ax = plt.subplots()
ax.plot([1, 2, 3])
with io.BytesIO() as ps:
fig.savefig(ps, format='ps')
@cleanup
@needs_tex
@needs_ghostscript
def test_tilde_in_tempfilename():
# Tilde ~ in the tempdir path (e.g. TMPDIR, TMP oder TEMP on windows
# when the username is very long and windows uses a short name) breaks
# latex before https://github.com/matplotlib/matplotlib/pull/5928
import tempfile
import shutil
import os
import os.path
tempdir = None
old_tempdir = tempfile.tempdir
try:
# change the path for new tempdirs, which is used
# internally by the ps backend to write a file
tempdir = tempfile.mkdtemp()
base_tempdir = os.path.join(tempdir, "short~1")
os.makedirs(base_tempdir)
tempfile.tempdir = base_tempdir
# usetex results in the latex call, which does not like the ~
plt.rc('text', usetex=True)
plt.plot([1, 2, 3, 4])
plt.xlabel(r'\textbf{time} (s)')
#matplotlib.verbose.set_level("debug")
output_eps = os.path.join(base_tempdir, 'tex_demo.eps')
# use the PS backend to write the file...
plt.savefig(output_eps, format="ps")
finally:
tempfile.tempdir = old_tempdir
if tempdir:
try:
shutil.rmtree(tempdir)
except Exception as e:
# do not break if this is not removeable...
print(e)
if __name__ == '__main__':
import nose
nose.runmodule(argv=['-s', '--with-doctest'], exit=False)
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