"""

pytest markers for the internal Matplotlib test suite.

"""

import logging

import shutil

import pytest

import matplotlib.testing

import matplotlib.testing.compare

from matplotlib import _get_executable_info, ExecutableNotFoundError

_log = logging.getLogger(__name__)

def _checkdep_usetex() -> bool:

if not shutil.which("tex"):

_log.warning("usetex mode requires TeX.")

return False

try:

_get_executable_info("dvipng")

except ExecutableNotFoundError:

_log.warning("usetex mode requires dvipng.")

return False

try:

_get_executable_info("gs")

except ExecutableNotFoundError:

_log.warning("usetex mode requires ghostscript.")

return False

return True

needs_ghostscript = pytest.mark.skipif(

"eps" not in matplotlib.testing.compare.converter,

reason="This test needs a ghostscript installation")

needs_pgf_lualatex = pytest.mark.skipif(

not matplotlib.testing._check_for_pgf('lualatex'),

reason='lualatex + pgf is required')

needs_pgf_pdflatex = pytest.mark.skipif(

not matplotlib.testing._check_for_pgf('pdflatex'),

reason='pdflatex + pgf is required')

needs_pgf_xelatex = pytest.mark.skipif(

not matplotlib.testing._check_for_pgf('xelatex'),

reason='xelatex + pgf is required')

needs_usetex = pytest.mark.skipif(

not _checkdep_usetex(),

reason="This test needs a TeX installation")