zhengruifeng opened a new pull request, #45952:
URL: https://github.com/apache/spark/pull/45952
### What changes were proposed in this pull request?
Add a helper function to sort PS Frame/Series
Use it in `pyspark.pandas.tests.diff_frames_ops.test_arithmetic_*` and their
parity tests
### Why are the changes needed?
normally, `sort_index` or `sort_value` is enough to make test result
deterministic. However, there are some edge case like `MultiIndex` that the
indices could be duplicated and the sorted result is non-deterministic. for
example, test
`pyspark.pandas.tests.connect.diff_frames_ops.test_parity_arithmetic_chain.ArithmeticChainParityTests.test_arithmetic_chain`
fail in some testing envs even with `sort_index`:
```
Left:
cow length 250.0
power NaN
speed -218.8
speed 1.2
weight NaN
...
float64
Right:
cow length 250.0
power NaN
speed 1.2
speed -218.8
weight NaN
...
float64
```
This PR introduce a new helper function to sort indices and values together.
### Does this PR introduce _any_ user-facing change?
no, test only
### How was this patch tested?
ci
### Was this patch authored or co-authored using generative AI tooling?
no
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