TST: remove patches to pandas.util.testing.N

pandas/tests/indexing/multiindex/conftest.py

@@ -18,11 +18,12 @@ def multiindex_dataframe_random_data():
 
 
 @pytest.fixture
-def multiindex_year_month_day_dataframe_random_data():
+def multiindex_year_month_day_dataframe_random_data(monkeypatch):
     """DataFrame with 3 level MultiIndex (year, month, day) covering
     first 100 business days from 2000-01-01 with random data"""
-    tm.N = 100
-    tdf = tm.makeTimeDataFrame()
+    with monkeypatch.context() as m:
+        m.setattr("pandas.util.testing.N", 100)
+        tdf = tm.makeTimeDataFrame()
     ymd = tdf.groupby([lambda x: x.year, lambda x: x.month,
                        lambda x: x.day]).sum()
     # use Int64Index, to make sure things work

pandas/tests/plotting/test_datetimelike.py

@@ -312,11 +312,10 @@ def test_business_freq(self):
         assert PeriodIndex(data=idx).freqstr == 'B'
 
     @pytest.mark.slow
-    def test_business_freq_convert(self):
-        n = tm.N
-        tm.N = 300
-        bts = tm.makeTimeSeries().asfreq('BM')
-        tm.N = n
+    def test_business_freq_convert(self, monkeypatch):
+        with monkeypatch.context() as m:
+            m.setattr("pandas.util.testing.N", 300)
+            bts = tm.makeTimeSeries().asfreq('BM')
         ts = bts.to_period('M')
         _, ax = self.plt.subplots()
         bts.plot(ax=ax)

pandas/tests/reshape/merge/test_join.py

@@ -697,11 +697,11 @@ def test_panel_join_overlap(self):
             expected = no_overlap.join(p1_suf.join(p2_suf))
             tm.assert_panel_equal(joined, expected)
 
-    def test_panel_join_many(self):
+    def test_panel_join_many(self, monkeypatch):
         with catch_warnings(record=True):
-            tm.K = 10
-            panel = tm.makePanel()
-            tm.K = 4
+            with monkeypatch.context() as m:
+                m.setattr("pandas.util.testing.K", 10)
+                panel = tm.makePanel()
 
             panels = [panel.iloc[:2], panel.iloc[2:6], panel.iloc[6:]]
 

pandas/tests/series/test_alter_axes.py

@@ -22,8 +22,8 @@ def test_setindex(self, string_series):
             string_series.index = None
 
         # wrong length
-        msg = (r"Length mismatch: Expected axis has (30|100) elements, new"
-               r" values have (29|99) elements")
+        msg = ("Length mismatch: Expected axis has 30 elements, new"
+               " values have 29 elements")
         with pytest.raises(ValueError, match=msg):
             string_series.index = np.arange(len(string_series) - 1)
 

pandas/tests/test_multilevel.py

@@ -47,8 +47,10 @@ def setup_method(self, method):
         s[3] = np.NaN
         self.series = s
 
+        n = tm.N
         tm.N = 100
         self.tdf = tm.makeTimeDataFrame()
+        tm.N = n
         self.ymd = self.tdf.groupby([lambda x: x.year, lambda x: x.month,
                                      lambda x: x.day]).sum()