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- import pytest
- import platform
- import matplotlib as mpl
- from matplotlib.testing.decorators import check_figures_equal, image_comparison
- import matplotlib.pyplot as plt
- from matplotlib.ticker import EngFormatter
- @pytest.fixture(autouse=True) # All tests in this module use usetex.
- def usetex():
- if not mpl.checkdep_usetex(True):
- pytest.skip('Missing TeX of Ghostscript or dvipng')
- mpl.rcParams['text.usetex'] = True
- @image_comparison(baseline_images=['test_usetex'],
- extensions=['pdf', 'png'],
- tol={'aarch64': 2.868}.get(platform.machine(), 0.3))
- def test_usetex():
- fig = plt.figure()
- ax = fig.add_subplot(111)
- ax.text(0.1, 0.2,
- # the \LaTeX macro exercises character sizing and placement,
- # \left[ ... \right\} draw some variable-height characters,
- # \sqrt and \frac draw horizontal rules, \mathrm changes the font
- r'\LaTeX\ $\left[\int\limits_e^{2e}'
- r'\sqrt\frac{\log^3 x}{x}\,\mathrm{d}x \right\}$',
- fontsize=24)
- ax.set_xticks([])
- ax.set_yticks([])
- @check_figures_equal()
- def test_unicode_minus(fig_test, fig_ref):
- fig_test.text(.5, .5, "$-$")
- fig_ref.text(.5, .5, "\N{MINUS SIGN}")
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