[Python-ideas] hookable assertions - to support testing utilities and debugging (original) (raw)

Nick Coghlan ncoghlan at gmail.com
Thu Feb 19 12:12:23 CET 2015


On 19 February 2015 at 21:05, Steven D'Aprano <steve at pearwood.info> wrote:

On Thu, Feb 19, 2015 at 08:25:34AM +0100, Ronny Pfannschmidt wrote:

Hi, the idea is to have the assert statement call a global method, just like import does one could then do something like [...] I believe that overloading assert in this fashion is an abuse of assert. If we want custom "raise if not this condition" calls, I think we should copy unittest and define functions that do what we want, not abuse the assert statement. If you want to (mis)use assert for unit and regression testing, you should see the nose third party module and see if that does the sort of thing you want.

py.test is the one to look at for this: http://pytest.org/latest/assert.html#assert-with-the-assert-statement

It (optionally) rewrites the AST for assert statements to make them suitable for testing purposes rather than being optional runtime integrity checks.

Cheers, Nick.

-- Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia



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