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|
import pytest
@pytest.mark.parametrize(
"ini, cli, kwarg, expected",
[
("backend1", None, None, "backend1"),
("backend1", "backend2", None, "backend2"),
("backend1", "backend2", "backend3", "backend3"),
],
)
def test_config(pytester, ini, cli, kwarg, expected):
ini = f"mpl-default-backend = {ini}" if ini else ""
pytester.makeini(
f"""
[pytest]
{ini}
"""
)
kwarg = f"backend='{kwarg}'" if kwarg else ""
pytester.makepyfile(
f"""
import matplotlib.pyplot as plt
import pytest
@pytest.mark.mpl_image_compare({kwarg})
def test_mpl():
fig, ax = plt.subplots()
ax.plot([1, 2, 3])
return fig
"""
)
cli = f"--mpl-default-backend={cli}" if cli else ""
result = pytester.runpytest("--mpl", cli)
result.assert_outcomes(failed=1)
result.stdout.re_match_lines([f".*(ModuleNotFound|Value)Error: .*{expected}.*"])
|
