TST: stricter monotonicity/uniqueness tests #23256
Merged
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git diff upstream/master -u -- "*.py" | flake8 --diff
Asserting a method always passes. For example
assert df.agg
always passes.By making the monotonicity and uniqueness tests stricter (i.e. testing for actual True/False rather than truthy/Falsy values) I think we get better ensurance that some PR doesn't accidentally turn a property into a method or that the property doesn't accidentally returns a non-boolean return value.