TST: resample dtype issue xref #15418

Author: jreback

pandas/tests/tseries/test_resample.py

@@ -1944,7 +1944,7 @@ def test_resample_nunique_with_date_gap(self):
         index = pd.date_range('1-1-2000', '2-15-2000', freq='h')
         index2 = pd.date_range('4-15-2000', '5-15-2000', freq='h')
         index3 = index.append(index2)
-        s = pd.Series(range(len(index3)), index=index3)
+        s = pd.Series(range(len(index3)), index=index3, dtype='int64')
         r = s.resample('M')
 
         # Since all elements are unique, these should all be the same