Xarray test suite failing with dask-master

There are a wide variety of failures, mostly related to backends and indexing, e.g., AttributeError: 'tuple' object has no attribute 'tuple'. By the looks of it, something is going wrong with xarray’s internal ExplicitIndexer objects, which are getting converted into something else.

I’m pretty sure this is due to the recent merge of the Array._meta pull request: https://github.com/dask/dask/pull/4543

There are 81 test failures, but my guess is that there that probably only a handful (at most) of underlying causes.

[shoyer]

We’re down to 1 failing test!

        # Invalid cases
        if not use_dask or LooseVersion(dask.__version__) > LooseVersion('0.17.4'):
            with pytest.raises(TypeError):
>               xr.dot(da_a, dims='a', invalid=None)
E               Failed: DID NOT RAISE <class 'TypeError'>

I think this was an intentional change – see https://github.com/dask/dask/pull/4914.

[pentschev]

Indeed it was. Regardless, https://github.com/dask/dask/pull/4954 will solve that.