I see what you mean, this is nice [?]
On Thu, May 28, 2015 at 11:25 PM, Herwig Hochleitner <hhochleit...@gmail.com
> wrote:
> 2015-05-28 19:42 GMT+02:00 Mohit Thatte <mohit.tha...@gmail.com>:
>>
>> The interesting question here is what constitutes useful information!
>>
>
> (let [pred #(exists? ".foo")]
> (wait-until pred)) ;; <- the fact that it's called 'pred is not
> interesting in most cases
>
>
>> The trade-off is breaking an existing public API.
>>
>
> How so?
>
> (defmacro op [msg args expr]
> `(with-meta (fn ~args ~expr) {:msg ~msg :args '~args :expr '~expr}))
>
> (let [pred1 #(exists? ".foo")
> pred2 (op "checks existance" [] (exists? ".foo"))]
> ;; both these will work, the one with pred1 will give less useful
> errors. the API of wait-until is unchanged
> (wait-until pred1)
> (wait-until pred2))
>
> If Shalaka's primary goal is prettier errors in test failures, I'd settle
>> for the fn body itself as the error message and that could be achieved
>> without breaking the API.
>>
>
> The op macro can include the code in its information.
>
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-Mohit Thatte
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