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381 lines
12 KiB
Python
381 lines
12 KiB
Python
from collections import Counter
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from pathlib import Path
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import io
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import re
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import tempfile
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import numpy as np
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import pytest
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from matplotlib import cbook, path, patheffects, font_manager as fm
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from matplotlib.figure import Figure
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from matplotlib.patches import Ellipse
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from matplotlib.testing._markers import needs_ghostscript, needs_usetex
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from matplotlib.testing.decorators import check_figures_equal, image_comparison
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import matplotlib as mpl
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import matplotlib.collections as mcollections
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import matplotlib.colors as mcolors
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import matplotlib.pyplot as plt
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# This tests tends to hit a TeX cache lock on AppVeyor.
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@pytest.mark.flaky(reruns=3)
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@pytest.mark.parametrize('papersize', ['letter', 'figure'])
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@pytest.mark.parametrize('orientation', ['portrait', 'landscape'])
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@pytest.mark.parametrize('format, use_log, rcParams', [
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('ps', False, {}),
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('ps', False, {'ps.usedistiller': 'ghostscript'}),
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('ps', False, {'ps.usedistiller': 'xpdf'}),
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('ps', False, {'text.usetex': True}),
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('eps', False, {}),
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('eps', True, {'ps.useafm': True}),
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('eps', False, {'text.usetex': True}),
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], ids=[
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'ps',
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'ps with distiller=ghostscript',
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'ps with distiller=xpdf',
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'ps with usetex',
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'eps',
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'eps afm',
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'eps with usetex'
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])
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def test_savefig_to_stringio(format, use_log, rcParams, orientation, papersize):
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mpl.rcParams.update(rcParams)
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if mpl.rcParams["ps.usedistiller"] == "ghostscript":
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try:
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mpl._get_executable_info("gs")
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except mpl.ExecutableNotFoundError as exc:
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pytest.skip(str(exc))
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elif mpl.rcParams["ps.usedistiller"] == "xpdf":
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try:
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mpl._get_executable_info("gs") # Effectively checks for ps2pdf.
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mpl._get_executable_info("pdftops")
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except mpl.ExecutableNotFoundError as exc:
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pytest.skip(str(exc))
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fig, ax = plt.subplots()
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with io.StringIO() as s_buf, io.BytesIO() as b_buf:
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if use_log:
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ax.set_yscale('log')
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ax.plot([1, 2], [1, 2])
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title = "Déjà vu"
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if not mpl.rcParams["text.usetex"]:
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title += " \N{MINUS SIGN}\N{EURO SIGN}"
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ax.set_title(title)
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allowable_exceptions = []
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if mpl.rcParams["text.usetex"]:
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allowable_exceptions.append(RuntimeError)
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if mpl.rcParams["ps.useafm"]:
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allowable_exceptions.append(mpl.MatplotlibDeprecationWarning)
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try:
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fig.savefig(s_buf, format=format, orientation=orientation,
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papertype=papersize)
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fig.savefig(b_buf, format=format, orientation=orientation,
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papertype=papersize)
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except tuple(allowable_exceptions) as exc:
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pytest.skip(str(exc))
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assert not s_buf.closed
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assert not b_buf.closed
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s_val = s_buf.getvalue().encode('ascii')
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b_val = b_buf.getvalue()
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if format == 'ps':
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# Default figsize = (8, 6) inches = (576, 432) points = (203.2, 152.4) mm.
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# Landscape orientation will swap dimensions.
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if mpl.rcParams["ps.usedistiller"] == "xpdf":
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# Some versions specifically show letter/203x152, but not all,
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# so we can only use this simpler test.
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if papersize == 'figure':
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assert b'letter' not in s_val.lower()
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else:
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assert b'letter' in s_val.lower()
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elif mpl.rcParams["ps.usedistiller"] or mpl.rcParams["text.usetex"]:
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width = b'432.0' if orientation == 'landscape' else b'576.0'
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wanted = (b'-dDEVICEWIDTHPOINTS=' + width if papersize == 'figure'
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else b'-sPAPERSIZE')
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assert wanted in s_val
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else:
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if papersize == 'figure':
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assert b'%%DocumentPaperSizes' not in s_val
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else:
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assert b'%%DocumentPaperSizes' in s_val
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# Strip out CreationDate: ghostscript and cairo don't obey
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# SOURCE_DATE_EPOCH, and that environment variable is already tested in
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# test_determinism.
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s_val = re.sub(b"(?<=\n%%CreationDate: ).*", b"", s_val)
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b_val = re.sub(b"(?<=\n%%CreationDate: ).*", b"", b_val)
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assert s_val == b_val.replace(b'\r\n', b'\n')
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def test_patheffects():
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mpl.rcParams['path.effects'] = [
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patheffects.withStroke(linewidth=4, foreground='w')]
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fig, ax = plt.subplots()
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ax.plot([1, 2, 3])
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with io.BytesIO() as ps:
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fig.savefig(ps, format='ps')
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@needs_usetex
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@needs_ghostscript
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def test_tilde_in_tempfilename(tmp_path):
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# Tilde ~ in the tempdir path (e.g. TMPDIR, TMP or TEMP on windows
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# when the username is very long and windows uses a short name) breaks
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# latex before https://github.com/matplotlib/matplotlib/pull/5928
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base_tempdir = tmp_path / "short-1"
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base_tempdir.mkdir()
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# Change the path for new tempdirs, which is used internally by the ps
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# backend to write a file.
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with cbook._setattr_cm(tempfile, tempdir=str(base_tempdir)):
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# usetex results in the latex call, which does not like the ~
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mpl.rcParams['text.usetex'] = True
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plt.plot([1, 2, 3, 4])
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plt.xlabel(r'\textbf{time} (s)')
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# use the PS backend to write the file...
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plt.savefig(base_tempdir / 'tex_demo.eps', format="ps")
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@image_comparison(["empty.eps"])
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def test_transparency():
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fig, ax = plt.subplots()
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ax.set_axis_off()
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ax.plot([0, 1], color="r", alpha=0)
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ax.text(.5, .5, "foo", color="r", alpha=0)
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@needs_usetex
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@image_comparison(["empty.eps"])
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def test_transparency_tex():
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mpl.rcParams['text.usetex'] = True
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fig, ax = plt.subplots()
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ax.set_axis_off()
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ax.plot([0, 1], color="r", alpha=0)
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ax.text(.5, .5, "foo", color="r", alpha=0)
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def test_bbox():
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fig, ax = plt.subplots()
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with io.BytesIO() as buf:
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fig.savefig(buf, format='eps')
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buf = buf.getvalue()
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bb = re.search(b'^%%BoundingBox: (.+) (.+) (.+) (.+)$', buf, re.MULTILINE)
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assert bb
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hibb = re.search(b'^%%HiResBoundingBox: (.+) (.+) (.+) (.+)$', buf,
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re.MULTILINE)
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assert hibb
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for i in range(1, 5):
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# BoundingBox must use integers, and be ceil/floor of the hi res.
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assert b'.' not in bb.group(i)
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assert int(bb.group(i)) == pytest.approx(float(hibb.group(i)), 1)
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@needs_usetex
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def test_failing_latex():
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"""Test failing latex subprocess call"""
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mpl.rcParams['text.usetex'] = True
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# This fails with "Double subscript"
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plt.xlabel("$22_2_2$")
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with pytest.raises(RuntimeError):
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plt.savefig(io.BytesIO(), format="ps")
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@needs_usetex
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def test_partial_usetex(caplog):
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caplog.set_level("WARNING")
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plt.figtext(.1, .1, "foo", usetex=True)
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plt.figtext(.2, .2, "bar", usetex=True)
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plt.savefig(io.BytesIO(), format="ps")
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record, = caplog.records # asserts there's a single record.
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assert "as if usetex=False" in record.getMessage()
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@needs_usetex
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def test_usetex_preamble(caplog):
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mpl.rcParams.update({
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"text.usetex": True,
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# Check that these don't conflict with the packages loaded by default.
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"text.latex.preamble": r"\usepackage{color,graphicx,textcomp}",
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})
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plt.figtext(.5, .5, "foo")
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plt.savefig(io.BytesIO(), format="ps")
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@image_comparison(["useafm.eps"])
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def test_useafm():
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mpl.rcParams["ps.useafm"] = True
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fig, ax = plt.subplots()
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ax.set_axis_off()
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ax.axhline(.5)
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ax.text(.5, .5, "qk")
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@image_comparison(["type3.eps"])
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def test_type3_font():
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plt.figtext(.5, .5, "I/J")
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@image_comparison(["coloredhatcheszerolw.eps"])
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def test_colored_hatch_zero_linewidth():
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ax = plt.gca()
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ax.add_patch(Ellipse((0, 0), 1, 1, hatch='/', facecolor='none',
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edgecolor='r', linewidth=0))
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ax.add_patch(Ellipse((0.5, 0.5), 0.5, 0.5, hatch='+', facecolor='none',
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edgecolor='g', linewidth=0.2))
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ax.add_patch(Ellipse((1, 1), 0.3, 0.8, hatch='\\', facecolor='none',
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edgecolor='b', linewidth=0))
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ax.set_axis_off()
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@check_figures_equal(extensions=["eps"])
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def test_text_clip(fig_test, fig_ref):
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ax = fig_test.add_subplot()
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# Fully clipped-out text should not appear.
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ax.text(0, 0, "hello", transform=fig_test.transFigure, clip_on=True)
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fig_ref.add_subplot()
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@needs_ghostscript
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def test_d_glyph(tmp_path):
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# Ensure that we don't have a procedure defined as /d, which would be
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# overwritten by the glyph definition for "d".
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fig = plt.figure()
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fig.text(.5, .5, "def")
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out = tmp_path / "test.eps"
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fig.savefig(out)
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mpl.testing.compare.convert(out, cache=False) # Should not raise.
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@image_comparison(["type42_without_prep.eps"], style='mpl20')
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def test_type42_font_without_prep():
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# Test whether Type 42 fonts without prep table are properly embedded
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mpl.rcParams["ps.fonttype"] = 42
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mpl.rcParams["mathtext.fontset"] = "stix"
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plt.figtext(0.5, 0.5, "Mass $m$")
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@pytest.mark.parametrize('fonttype', ["3", "42"])
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def test_fonttype(fonttype):
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mpl.rcParams["ps.fonttype"] = fonttype
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fig, ax = plt.subplots()
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ax.text(0.25, 0.5, "Forty-two is the answer to everything!")
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buf = io.BytesIO()
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fig.savefig(buf, format="ps")
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test = b'/FontType ' + bytes(f"{fonttype}", encoding='utf-8') + b' def'
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assert re.search(test, buf.getvalue(), re.MULTILINE)
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def test_linedash():
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"""Test that dashed lines do not break PS output"""
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fig, ax = plt.subplots()
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ax.plot([0, 1], linestyle="--")
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buf = io.BytesIO()
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fig.savefig(buf, format="ps")
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assert buf.tell() > 0
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def test_empty_line():
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# Smoke-test for gh#23954
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figure = Figure()
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figure.text(0.5, 0.5, "\nfoo\n\n")
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buf = io.BytesIO()
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figure.savefig(buf, format='eps')
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figure.savefig(buf, format='ps')
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def test_no_duplicate_definition():
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fig = Figure()
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axs = fig.subplots(4, 4, subplot_kw=dict(projection="polar"))
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for ax in axs.flat:
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ax.set(xticks=[], yticks=[])
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ax.plot([1, 2])
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fig.suptitle("hello, world")
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buf = io.StringIO()
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fig.savefig(buf, format='eps')
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buf.seek(0)
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wds = [ln.partition(' ')[0] for
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ln in buf.readlines()
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if ln.startswith('/')]
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assert max(Counter(wds).values()) == 1
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@image_comparison(["multi_font_type3.eps"], tol=0.51)
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def test_multi_font_type3():
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fp = fm.FontProperties(family=["WenQuanYi Zen Hei"])
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if Path(fm.findfont(fp)).name != "wqy-zenhei.ttc":
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pytest.skip("Font may be missing")
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plt.rc('font', family=['DejaVu Sans', 'WenQuanYi Zen Hei'], size=27)
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plt.rc('ps', fonttype=3)
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fig = plt.figure()
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fig.text(0.15, 0.475, "There are 几个汉字 in between!")
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@image_comparison(["multi_font_type42.eps"], tol=1.6)
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def test_multi_font_type42():
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fp = fm.FontProperties(family=["WenQuanYi Zen Hei"])
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if Path(fm.findfont(fp)).name != "wqy-zenhei.ttc":
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pytest.skip("Font may be missing")
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plt.rc('font', family=['DejaVu Sans', 'WenQuanYi Zen Hei'], size=27)
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plt.rc('ps', fonttype=42)
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fig = plt.figure()
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fig.text(0.15, 0.475, "There are 几个汉字 in between!")
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@image_comparison(["scatter.eps"])
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def test_path_collection():
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rng = np.random.default_rng(19680801)
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xvals = rng.uniform(0, 1, 10)
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yvals = rng.uniform(0, 1, 10)
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sizes = rng.uniform(30, 100, 10)
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fig, ax = plt.subplots()
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ax.scatter(xvals, yvals, sizes, edgecolor=[0.9, 0.2, 0.1], marker='<')
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ax.set_axis_off()
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paths = [path.Path.unit_regular_polygon(i) for i in range(3, 7)]
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offsets = rng.uniform(0, 200, 20).reshape(10, 2)
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sizes = [0.02, 0.04]
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pc = mcollections.PathCollection(paths, sizes, zorder=-1,
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facecolors='yellow', offsets=offsets)
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ax.add_collection(pc)
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ax.set_xlim(0, 1)
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@image_comparison(["colorbar_shift.eps"], savefig_kwarg={"bbox_inches": "tight"},
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style="mpl20")
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def test_colorbar_shift(tmp_path):
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cmap = mcolors.ListedColormap(["r", "g", "b"])
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norm = mcolors.BoundaryNorm([-1, -0.5, 0.5, 1], cmap.N)
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plt.scatter([0, 1], [1, 1], c=[0, 1], cmap=cmap, norm=norm)
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plt.colorbar()
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def test_auto_papersize_removal():
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fig = plt.figure()
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with pytest.raises(ValueError, match="'auto' is not a valid value"):
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fig.savefig(io.BytesIO(), format='eps', papertype='auto')
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with pytest.raises(ValueError, match="'auto' is not a valid value"):
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mpl.rcParams['ps.papersize'] = 'auto'
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