mend

Author: discort

pandas/tests/test_resample.py

@@ -3118,6 +3118,11 @@ def f(x):
         result = df.resample('M').apply(f)
         assert_frame_equal(result, expected)
 
+        # A case for series
+        expected = df['col1'].groupby(pd.Grouper(freq='M')).apply(f)
+        result = df['col1'].resample('M').apply(f)
+        assert_series_equal(result, expected)
+
     def test_resample_groupby_with_label(self):
         # GH 13235
         index = date_range('2000-01-01', freq='2D', periods=5)