tonghuaroot created SPARK-57363:
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Summary: Add tests for Index.identical in pandas-on-Spark
Key: SPARK-57363
URL: https://issues.apache.org/jira/browse/SPARK-57363
Project: Spark
Issue Type: Test
Components: Pandas API on Spark
Affects Versions: 5.0.0
Reporter: tonghuaroot
Index.identical in pandas-on-Spark (pyspark.pandas.indexes.base.Index) has no
positive test coverage. The method behaves like Index.equals but additionally
requires the index name(s) to match, yet the test suite never asserts its
True/False result - the only reference to it is a comment in test_equals noting
that equals ignores the index name unlike identical. This adds positive parity
tests in IndexBasicMixin (python/pyspark/pandas/tests/indexes/test_basic.py),
comparing Index.identical against pandas for: a single Index compared with
itself; equal elements with the same name (-> True); equal elements with a
different name (-> False, the case that distinguishes identical from equals);
unequal elements (-> False); a MultiIndex compared with itself and with another
MultiIndex that has the same tuples but different level names (-> False); and
an Index compared against a MultiIndex (-> False). Cross-object comparisons are
wrapped in option_context('compute.ops_on_diff_frames', True), mirroring the
existing test_equals. No product code changes; tests only.
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