The stackoverflow link you posted shows that the winner of the discussion (marked as accepted and higher votes) is the answer that tells you NOT to test private methods.
If a private method is changed, the tests for the public methods should pick it up, via a difference in the expected output of the public methods that use the private method.
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The stackoverflow link you posted shows that the winner of the discussion (marked as accepted and higher votes) is the answer that tells you NOT to test private methods.
If a private method is changed, the tests for the public methods should pick it up, via a difference in the expected output of the public methods that use the private method.