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Fix test_non_gui_warning for Azure (and mplcairo). #12726

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Nov 4, 2018
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Fix test_non_gui_warning for Azure (and mplcairo). #12726

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6 changes: 3 additions & 3 deletions lib/matplotlib/tests/test_backend_bases.py
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Original file line number Diff line number Diff line change
Expand Up @@ -58,11 +58,11 @@ def test_get_default_filename(tmpdir):


@pytest.mark.backend('pdf')
@pytest.mark.skipif('SYSTEM_TEAMFOUNDATIONCOLLECTIONURI' in os.environ,
reason="this test fails an azure for unknown reasons")
def test_non_gui_warning():
def test_non_gui_warning(monkeypatch):
plt.subplots()

monkeypatch.setitem(os.environ, "DISPLAY", ":999")

with pytest.warns(UserWarning) as rec:
plt.show()
assert len(rec) == 1
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