test: dask Backend specific xfailed tests

This tracks tests xfailed only in the dask backend (i.e. not the pandas backend). This provides a good tracker of compatibility differences. In the codebase sections of not working code will be marked TODO - <reason keyword> - #2553.

Backend Specific Tests

Done?	test file	test name	reason	keyword	GH Issue
❌	test_datatypes	test_series_to_ibis_literal	ir.as_value_expr does not handle dd.Series	as_value_expr
❌	test_arrays	test_array_collect_rolling_partitioned	Windowing not implemented	windowing
❌	test_join	test_join_with_non_trivial_key	execute_materialized_join is broken	execute_materialized_join
❌	test_join	test_join_with_non_trivial_key_project_table	execute_materialized_join is broken	execute_materialized_join
❌	test_operations	test_project_scope_does_not_override	Windowing not implemented	windowing
✔️	test_operations	test_aggregation_group_by	Aggregations not implemented	aggregations
✔️	test_operations	test_boolean_aggregation	Aggregations not implemented	aggregations
❌	test_operations	test_sort_by	Sorting partially implemented	sorting
❌	test_operations	test_complex_sort_by	Sorting partially implemented	sorting
✔️	test_operations	test_weighted_average	Grouping not implemented	grouping
✔️	test_operations	test_groupby_with_unnamed_arithmetic	Grouping not implemented	grouping
✔️	test_operations	test_cast_on_group_by	Grouping not implemented	grouping
✔️	test_operations	test_left_binary_op_gb	Aggregations not implemented	aggregations
✔️	test_structs	test_struct_field_series_group_by_value	Grouping not implemented	grouping
❌	test_timecontext	test_context_adjustment_window	Windowing not implemented	windowing
❌	test_timecontext	test_setting_timecontext_in_scope	Windowing not implemented	windowing
❌	test_timecontext	test_context_adjustment_multi_window	Windowing not implemented	windowing
❌	test_timecontext	test_context_adjustment_window_groupby_id	Windowing not implemented	windowing
❌	test_udf	test_udaf_analytic_groupby	Windowing not implemented	windowing
❌	test_udf	test_udaf_window	Windowing not implemented	windowing
❌	test_udf	test_udaf_window_interval	Windowing not implemented	windowing
❌	test_udf	test_multiple_argument_udaf_window	Windowing not implemented	windowing
❌	test_udf	test_udaf_window_nan	Windowing not implemented	windowing
✔️	test_udf	test_array_return_type_reduction_window	Windowing not implemented	windowing

Ibis/all tests

Done?	test file	test name	reason	keyword	GH Issue
✔️	test_join	test_join_project_left_table	Pandas used in test	pandas
✔️	test_generic	test_isin	Sorting not implemented	sorting
✔️	test_generic	test_notin	Sorting not implemented	sorting
✔️	test_union	test_union	Pandas used in test	pandas
✔️	test_aggregations	test_aggregate	Aggregations not implemented / pandas in test	aggregations
✔️	test_aggregations	test_aggregate_grouped	Aggregations not implemented / pandas in test	aggregations
✔️	test_aggregations	test_reduction_ops	iloc used in test	iloc
✔️	test_aggregations	test_group_concat	Aggregations not implemented / iloc in test	aggregations
✔️	test_aggregations	test_topk_op	Sorting not implemented / pandas in test	sorting
✔️	test_aggregations	test_topk_filter_op	Sorting not implemented / pandas in test	sorting
✔️	test_string	test_string_col_is_unicode	pandas used in test body	pandas
❌	test_string	test_string	different dtypes returned	dtype
❌	test_string	test_string	Substring operations not implemented	substring
✔️	test_temporal	test_timestamp_truncate	pandas used in test body	pandas
✔️	test_temporal	test_date_truncate	pandas used in test body	pandas
❌	test_temporal	test_integer_to_interval_timestamp	Dask issues with DateOffset	DateOffset	https://github.com/dask/dask/issues/6958
❌	test_temporal	test_integer_to_interval_date	Dask issues with DateOffset	DateOffset	https://github.com/dask/dask/issues/6958
✔️	test_temporal	test_temporal_binop	pandas used in test body	pandas
✔️	test_temporal	test_interval_add_cast_column	pandas used in test body (sorting)	pandas
✔️	test_temporal	test_day_of_week_column_group_by	pandas used in test body (sorting)	pandas
❌	test_temporal	test_now_from_projection	limit does not work	limit
✔️ :	test_vectorized_udf	test_analytic_udf_mutate	Windowing not implemented	windowing
❌	test_vectorized_udf	test_analytic_udf_destruct	Windowing not implemented	windowing
❌	test_vectorized_udf	test_analytic_udf_destruct_overwrite	Windowing not implemented	windowing
❌	test_vectorized_udf	test_reduction_udf_destruct_window	Windowing not implemented	windowing

Notes

• Many of the aggregation/grouping issues are interrelated (we often group before performing an aggregation)
• AggContext has also not been implemented for the dask backend.
• A large portion of the grouping issues are due to the fact that obj and grouper methods on Dask GroupBy structures

[emilyreff7]

A few additional tests were newly x-failed in the dask backend in this PR https://github.com/ibis-project/ibis/pull/2776/:

test file	test name	reason
test_vectorized_udf.py	test_elementwise_udf_destruct	Length mismatch
test_vectorized_udf.py	test_elementwise_udf_overwrite_destruct	Length mismatch
test_vectorized_udf.py	test_elementwise_udf_overwrite_destruct_and_assign	Length mismatch
test_vectorized_udf.py	test_elementwise_udf_destruct_exact_once	Length mismatch
test_vectorized_udf.py	test_elementwise_udf_multiple_overwrite_destruct	Length mismatch

[jreback]

you can add checkboxes to the above table to make this easier once these are starting to get fixed