11import numpy as np
22from io import BytesIO
33import os
4+ import re
45import tempfile
56import warnings
67import xml .parsers .expat
78
89import pytest
910
11+ import matplotlib as mpl
12+ from matplotlib import dviread
13+ from matplotlib .figure import Figure
1014import matplotlib .pyplot as plt
1115from matplotlib .testing .decorators import image_comparison
12- import matplotlib
13- from matplotlib import dviread
1416
1517
1618with warnings .catch_warnings ():
1719warnings .simplefilter ('ignore' )
1820needs_usetex = pytest .mark .skipif (
19- not matplotlib .checkdep_usetex (True ),
21+ not mpl .checkdep_usetex (True ),
2022reason = "This test needs a TeX installation" )
2123
2224
@@ -100,15 +102,10 @@ def test_bold_font_output_with_none_fonttype():
100102
101103def _test_determinism_save (filename ,usetex ):
102104# This function is mostly copy&paste from "def test_visibility"
103- # To require no GUI, we use Figure and FigureCanvasSVG
104- # instead of plt.figure and fig.savefig
105- from matplotlib .figure import Figure
106- from matplotlib .backends .backend_svg import FigureCanvasSVG
107- from matplotlib import rc
108- rc ('svg' ,hashsalt = 'asdf' )
109- rc ('text' ,usetex = usetex )
105+ mpl .rc ('svg' ,hashsalt = 'asdf' )
106+ mpl .rc ('text' ,usetex = usetex )
110107
111- fig = Figure ()
108+ fig = Figure ()# Require no GUI.
112109ax = fig .add_subplot (111 )
113110
114111x = np .linspace (0 ,4 * np .pi ,50 )
@@ -122,7 +119,7 @@ def _test_determinism_save(filename, usetex):
122119ax .set_xlabel ('A string $1+2+\\ sigma$' )
123120ax .set_ylabel ('A string $1+2+\\ sigma$' )
124121
125- FigureCanvasSVG ( fig ). print_svg (filename )
122+ fig . savefig (filename , format = "svg" )
126123
127124
128125@pytest .mark .parametrize (
@@ -165,36 +162,30 @@ def test_determinism(filename, usetex):
165162@needs_usetex
166163def test_missing_psfont (monkeypatch ):
167164"""An error is raised if a TeX font lacks a Type-1 equivalent"""
168- from matplotlib import rc
169165
170166def psfont (* args ,** kwargs ):
171167return dviread .PsFont (texname = 'texfont' ,psname = 'Some Font' ,
172168effects = None ,encoding = None ,filename = None )
173169
174170monkeypatch .setattr (dviread .PsfontsMap ,'__getitem__' ,psfont )
175- rc ('text' ,usetex = True )
171+ mpl . rc ('text' ,usetex = True )
176172fig ,ax = plt .subplots ()
177173ax .text (0.5 ,0.5 ,'hello' )
178174with tempfile .TemporaryFile ()as tmpfile ,pytest .raises (ValueError ):
179175fig .savefig (tmpfile ,format = 'svg' )
180176
181177
182- @needs_tex
178+ # Use Computer Modern Sans Serif, not Helvetica (which has no \textwon).
179+ @pytest .mark .style ('default' )
180+ @needs_usetex
183181def test_unicode_won ():
184- from pylab import rcParams ,plot ,ylabel ,savefig
185- rcParams .update ({'text.usetex' :True ,'text.latex.unicode' :True })
186-
187- plot (1 ,1 )
188- ylabel (r'\textwon' )
182+ fig = Figure ()
183+ fig .text (.5 ,.5 ,r'\textwon' ,usetex = True )
189184
190- fd = BytesIO ()
191- savefig (fd ,format = 'svg' )
192- fd .seek (0 )
193- buf = fd .read ().decode ()
194- fd .close ()
185+ with BytesIO ()as fd :
186+ fig .savefig (fd ,format = 'svg' )
187+ buf = fd .getvalue ().decode ('ascii' )
195188
196189won_id = 'Computer_Modern_Sans_Serif-142'
197- def_regex = re .compile (r'<path d=(.|\s)*?id="{0}"/>' .format (won_id ))
198- use_regex = re .compile (r'<use[^/>]*? xlink:href="#{0}"/>' .format (won_id ))
199- assertTrue (bool (def_regex .search (buf )))
200- assertTrue (bool (use_regex .search (buf )))
190+ assert re .search (r'<path d=(.|\s)*?id="{0}"/>' .format (won_id ),buf )
191+ assert re .search (r'<use[^/>]*? xlink:href="#{0}"/>' .format (won_id ),buf )