/usr/lib/python3/dist-packages/matplotlib/tests/test_backend_ps.py is in python3-matplotlib 1.5.1-1ubuntu1.
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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 | # -*- coding: utf-8 -*-
from __future__ import (absolute_import, division, print_function,
unicode_literals)
import io
import re
import numpy as np
from matplotlib.externals 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')
if __name__ == '__main__':
import nose
nose.runmodule(argv=['-s', '--with-doctest'], exit=False)
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