CI: xfail test_area_lim (#38212)

Author: jbrockmendel

pandas/tests/plotting/frame/test_frame.py

@@ -456,22 +456,28 @@ def test_line_lim(self):
  assert xmin <= lines[0].get_data()[0][0]
  assert xmax >= lines[0].get_data()[0][-1]
 
- def test_area_lim(self):
+ @pytest.mark.xfail(
+ strict=False,
+ reason="2020-12-01 this has been failing periodically on the "
+ "ymin==0 assertion for a week or so.",
+ )
+ @pytest.mark.parametrize("stacked", [True, False])
+ def test_area_lim(self, stacked):
  df = DataFrame(np.random.rand(6, 4), columns=["x", "y", "z", "four"])
 
  neg_df = -df
- for stacked in [True, False]:
- ax = _check_plot_works(df.plot.area, stacked=stacked)
- xmin, xmax = ax.get_xlim()
- ymin, ymax = ax.get_ylim()
- lines = ax.get_lines()
- assert xmin <= lines[0].get_data()[0][0]
- assert xmax >= lines[0].get_data()[0][-1]
- assert ymin == 0
 
- ax = _check_plot_works(neg_df.plot.area, stacked=stacked)
- ymin, ymax = ax.get_ylim()
- assert ymax == 0
+ ax = _check_plot_works(df.plot.area, stacked=stacked)
+ xmin, xmax = ax.get_xlim()
+ ymin, ymax = ax.get_ylim()
+ lines = ax.get_lines()
+ assert xmin <= lines[0].get_data()[0][0]
+ assert xmax >= lines[0].get_data()[0][-1]
+ assert ymin == 0
+
+ ax = _check_plot_works(neg_df.plot.area, stacked=stacked)
+ ymin, ymax = ax.get_ylim()
+ assert ymax == 0
 
  def test_area_sharey_dont_overwrite(self):
  # GH37942