BUG: The test test_series.py::test_case_when fails on Unidist

[AndreyPavlenko]

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Reproducible Example

Run the test test_series.py::test_case_when()

Issue Description

The with the new implementation #6972 of case_when(), the test fails on unidist. Currently, PandasQueryCompiler.case_when() defaults to Pandas for the Unidist engine.

Expected Behavior

The test passes.

Error Logs

File "/usr/share/miniconda3/envs/modin_on_unidist/lib/python3.9/site-packages/unidist/core/backends/mpi/core/controller/common.py", line 138, in pull_data
if info_package["package_type"] == common.MetadataPackage.SHARED_DATA:
TypeError: 'int' object is not subscriptable

Installed Versions

Replace this line with the output of pd.show_versions()