"error_module.message(error)" sounds good, yes!


*José Valim*
www.plataformatec.com.br
Skype: jv.ptec
Founder and Director of R&D

On Fri, Jun 16, 2017 at 3:08 PM, Michał Muskała <[email protected]> wrote:

> I don't think running Exception.message will cut it, since it will output
> a string that the message/1 implementation failed. Ideally, I wish the test
> would fail in that case.
>
> One solution would be to call error_module.message(error) manually, but
> this would mean ex_unit needs to replicate logic from Exception.message.
> Alternative would be to pattern match on the string returned from
> Exception.message, but this seems even more error-prone.
>
> Michał.
>
> On 16 Jun 2017, 15:02 +0200, José Valim <[email protected]>,
> wrote:
>
> Great catch. Yes, let's always invoke Exception.message on it, even if you
> don't match on it.
>
>
>
> *José Valim*
> www.plataformatec.com.br
> Skype: jv.ptec
> Founder and Director of R&D
>
> On Fri, Jun 16, 2017 at 2:54 PM, Michał Muskała <[email protected]> wrote:
>
>> Hello everybody,
>>
>> Right now, when using assert_raise/2 (without passing the message) the
>> test succeeds even if the exception itself has bad implementation of the
>> message/1 function and raises.
>>
>> I propose that assert_raise should fail whenever such a broken exception
>> implementation is encountered. This should allow catching additional bugs
>> in test suites.
>>
>> Michał.
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