[SPARK-23387][SQL][PYTHON][TEST][BRANCH-2.3] Backport assertPandasEqual to branch-2.3. #20577
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What changes were proposed in this pull request?
When backporting a pr with tests using
assertPandasEqual
from master to branch-2.3, the tests fail becauseassertPandasEqual
doesn't exist in branch-2.3.We should backport
assertPandasEqual
to branch-2.3 to avoid the failures.How was this patch tested?
Modified tests.