82 lines
2.2 KiB
Python
82 lines
2.2 KiB
Python
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"""
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Helper functions for testing.
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"""
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import locale
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import logging
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import subprocess
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from pathlib import Path
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from tempfile import TemporaryDirectory
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import matplotlib as mpl
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from matplotlib import _api
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_log = logging.getLogger(__name__)
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def set_font_settings_for_testing():
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mpl.rcParams['font.family'] = 'DejaVu Sans'
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mpl.rcParams['text.hinting'] = 'none'
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mpl.rcParams['text.hinting_factor'] = 8
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def set_reproducibility_for_testing():
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mpl.rcParams['svg.hashsalt'] = 'matplotlib'
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def setup():
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# The baseline images are created in this locale, so we should use
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# it during all of the tests.
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try:
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locale.setlocale(locale.LC_ALL, 'en_US.UTF-8')
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except locale.Error:
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try:
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locale.setlocale(locale.LC_ALL, 'English_United States.1252')
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except locale.Error:
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_log.warning(
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"Could not set locale to English/United States. "
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"Some date-related tests may fail.")
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mpl.use('Agg')
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with _api.suppress_matplotlib_deprecation_warning():
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mpl.rcdefaults() # Start with all defaults
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# These settings *must* be hardcoded for running the comparison tests and
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# are not necessarily the default values as specified in rcsetup.py.
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set_font_settings_for_testing()
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set_reproducibility_for_testing()
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def _check_for_pgf(texsystem):
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"""
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Check if a given TeX system + pgf is available
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Parameters
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----------
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texsystem : str
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The executable name to check
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"""
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with TemporaryDirectory() as tmpdir:
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tex_path = Path(tmpdir, "test.tex")
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tex_path.write_text(r"""
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\documentclass{minimal}
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\usepackage{pgf}
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\begin{document}
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\typeout{pgfversion=\pgfversion}
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\makeatletter
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\@@end
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""")
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try:
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subprocess.check_call(
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[texsystem, "-halt-on-error", str(tex_path)], cwd=tmpdir,
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stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
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except (OSError, subprocess.CalledProcessError):
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return False
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return True
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def _has_tex_package(package):
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return bool(mpl.dviread.find_tex_file(f"{package}.sty"))
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