TST: xfail some tests for mpl 2.2 compat

xref #20301

Author: jreback

pandas/tests/plotting/test_datetimelike.py

@@ -1356,10 +1356,10 @@ def test_plot_outofbounds_datetime(self):
  values = [datetime(1677, 1, 1, 12), datetime(1677, 1, 2, 12)]
  ax.plot(values)
 
+ @td.xfail_if_mpl_2_2
  @pytest.mark.skip(
  is_platform_mac(),
  "skip on mac for precision display issue on older mpl")
- @pytest.mark.xfail(reason="suspect on mpl 2.2.2")
  def test_format_timedelta_ticks_narrow(self):
 
  if self.mpl_ge_2_0_0:
@@ -1381,10 +1381,10 @@ def test_format_timedelta_ticks_narrow(self):
  for l, l_expected in zip(labels, expected_labels):
  assert l.get_text() == l_expected
 
+ @td.xfail_if_mpl_2_2
  @pytest.mark.skip(
  is_platform_mac(),
  "skip on mac for precision display issue on older mpl")
- @pytest.mark.xfail(reason="suspect on mpl 2.2.2")
  def test_format_timedelta_ticks_wide(self):
 
  if self.mpl_ge_2_0_0:

pandas/tests/plotting/test_frame.py

@@ -2461,6 +2461,7 @@ def test_errorbar_asymmetrical(self):
 
  tm.close()
 
+ @td.xfail_if_mpl_2_2
  def test_table(self):
  df = DataFrame(np.random.rand(10, 3),
  index=list(string.ascii_letters[:10]))

pandas/tests/plotting/test_misc.py

@@ -52,6 +52,7 @@ def test_bootstrap_plot(self):
 @td.skip_if_no_mpl
 class TestDataFramePlots(TestPlotBase):
 
+ @td.xfail_if_mpl_2_2
  @td.skip_if_no_scipy
  def test_scatter_matrix_axis(self):
  scatter_matrix = plotting.scatter_matrix

pandas/tests/plotting/test_series.py

@@ -792,6 +792,7 @@ def test_errorbar_plot(self):
  with pytest.raises((ValueError, TypeError)):
  s.plot(yerr=s_err)
 
+ @td.xfail_if_mpl_2_2
  def test_table(self):
  _check_plot_works(self.series.plot, table=True)
  _check_plot_works(self.series.plot, table=self.series)

pandas/util/_test_decorators.py

@@ -89,6 +89,17 @@ def _skip_if_mpl_1_5():
  mod.use("Agg", warn=False)
 
 
+def _skip_if_mpl_2_2():
+ mod = safe_import("matplotlib")
+
+ if mod:
+ v = mod.__version__
+ if LooseVersion(v) > LooseVersion('2.1.2'):
+ return True
+ else:
+ mod.use("Agg", warn=False)
+
+
 def _skip_if_has_locale():
  lang, _ = locale.getlocale()
  if lang is not None:
@@ -151,6 +162,8 @@ def decorated_func(func):
  reason="Missing matplotlib dependency")
 skip_if_mpl_1_5 = pytest.mark.skipif(_skip_if_mpl_1_5(),
  reason="matplotlib 1.5")
+xfail_if_mpl_2_2 = pytest.mark.xfail(_skip_if_mpl_2_2(),
+ reason="matplotlib 2.2")
 skip_if_32bit = pytest.mark.skipif(is_platform_32bit(),
  reason="skipping for 32 bit")
 skip_if_windows = pytest.mark.skipif(is_platform_windows(),