issues: 508167922

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id node_id number title user state locked assignee milestone comments created_at updated_at closed_at author_association active_lock_reason draft pull_request body reactions performed_via_github_app state_reason repo type
508167922 MDU6SXNzdWU1MDgxNjc5MjI= 3409 test failure with upstream-dev 2448579 closed 0     12 2019-10-17T00:34:32Z 2019-11-19T14:06:46Z 2019-11-19T14:06:46Z MEMBER      

https://dev.azure.com/xarray/xarray/_build/results?buildId=1101&view=logs

``` =================================== FAILURES =================================== ____ testdatetime_reduce[False] ______

dask = False

@arm_xfail
@pytest.mark.parametrize("dask", [False, True])
def test_datetime_reduce(dask):
    time = np.array(pd.date_range("15/12/1999", periods=11))
    time[8:11] = np.nan
    da = DataArray(np.linspace(0, 365, num=11), dims="time", coords={"time": time})

    if dask and has_dask:
        chunks = {"time": 5}
        da = da.chunk(chunks)

    actual = da["time"].mean()

  assert not pd.isnull(actual)

E AssertionError: assert not True E + where True = <function isna at 0x7f2475449ae8>(<xarray.DataArray 'time' ()>\narray('NaT', dtype='datetime64[ns]')) E + where <function isna at 0x7f2475449ae8> = pd.isnull

xarray/tests/test_duck_array_ops.py:288: AssertionError ____ test_datetime_reduce[True] ______

dask = True

@arm_xfail
@pytest.mark.parametrize("dask", [False, True])
def test_datetime_reduce(dask):
    time = np.array(pd.date_range("15/12/1999", periods=11))
    time[8:11] = np.nan
    da = DataArray(np.linspace(0, 365, num=11), dims="time", coords={"time": time})

    if dask and has_dask:
        chunks = {"time": 5}
        da = da.chunk(chunks)

    actual = da["time"].mean()

  assert not pd.isnull(actual)

E AssertionError: assert not True E + where True = <function isna at 0x7f2475449ae8>(<xarray.DataArray 'time' ()>\narray('NaT', dtype='datetime64[ns]')) E + where <function isna at 0x7f2475449ae8> = pd.isnull

xarray/tests/test_duck_array_ops.py:288: AssertionError =============================== warnings summary ```

 
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   completed 13221727 issue

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