(s, adjust, ignore_na, w)
| 413 | ], |
| 414 | ) |
| 415 | def test_ewma_nan_handling_cases(s, adjust, ignore_na, w): |
| 416 | # GH 7603 |
| 417 | s = Series(s) |
| 418 | expected = (s.multiply(w).cumsum() / Series(w).cumsum()).ffill() |
| 419 | result = s.ewm(com=2.0, adjust=adjust, ignore_na=ignore_na).mean() |
| 420 | |
| 421 | tm.assert_series_equal(result, expected) |
| 422 | if ignore_na is False: |
| 423 | # check that ignore_na defaults to False |
| 424 | result = s.ewm(com=2.0, adjust=adjust).mean() |
| 425 | tm.assert_series_equal(result, expected) |
| 426 | |
| 427 | |
| 428 | def test_ewm_alpha(): |