Update cmr10 minus sign test

casperdcl · timhoffm · casperdcl · commit d4d701ad1220 · 2021-04-23T17:58:38.000+01:00
Co-authored-by: Tim Hoffmann &lt;2836374+timhoffm@users.noreply.github.com&gt;
diff --git a/lib/matplotlib/tests/test_mathtext.py b/lib/matplotlib/tests/test_mathtext.py
@@ -387,7 +387,12 @@ def test_math_fontfamily():
              size=24, math_fontfamily='stix')
 
 
-def test_mathtext_fontfamily():
+def test_mathtext_cmr10_minus_sign():
+    # cmr10 does not contain a minus sign and used to issue a warning
+    # RuntimeWarning: Glyph 8722 missing from current font.
     mpl.rcParams['font.family'] = 'cmr10'
     fig, ax = plt.subplots()
     ax.plot(range(-1, 1), range(-1, 1))
+    with pytest.warns(None) as record:
+        fig.canvas.draw()
+    assert len(record) == 0    
