TST: add categorical tests for DataFrame.equals #63247

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ingo-stallknecht wants to merge 1 commit into pandas-dev:main from ingo-stallknecht:test-equals-categorical

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ingo-stallknecht commented Dec 2, 2025

closes #xxxx (Replace xxxx with the GitHub issue number)
Tests added and passed if fixing a bug or adding a new feature
All code checks passed.
Added type annotations to new arguments/methods/functions.
Added an entry in the latest doc/source/whatsnew/vX.X.X.rst file if fixing a bug or adding a new feature.
If I used AI to develop this pull request, I prompted it to follow AGENTS.md.

What changes are proposed in this pull request?

This PR adds tests for DataFrame.equals with Categorical columns:

Verifies that DataFrames are considered equal when values and categories are the same, even if the category order differs.
Verifies that DataFrames are not equal when the category set differs.

This helps improve test coverage for equals on Categorical data.

How is this PR tested?

New test in pandas/tests/frame/methods/test_equals.py

TST: add categorical tests for DataFrame.equals

550c039

Signed-off-by: Ingo Stallknecht <ingostallknecht@gmail.com>

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