[SPARK-49928][PYTHON][TESTS] Refactor plot-related unit tests #48415
+192
−50
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What changes were proposed in this pull request?
Refactor plot-related unit tests.
Why are the changes needed?
Different plots have different key attributes of the resulting figure to test against. The refactor makes the comparison easier.
Does this PR introduce any user-facing change?
No.
How was this patch tested?
Test changes.
Was this patch authored or co-authored using generative AI tooling?
No.