[erlang-questions] parametrized modules and unit testing

Ken Robinson <>
Mon Feb 22 13:18:13 CET 2010


Hi,
I've not used this module but it appears to give the behavior you want.
http://frihjul.net/emock

regards,
Ken.

On Mon, Feb 22, 2010 at 7:52 PM, Vlad Dumitrescu <> wrote:
> On Mon, Feb 22, 2010 at 10:28, pietje <> wrote:
>> Suppose I have 2 modules, say ma and mb, and that module ma uses
>> (imports) module mb.
>> I'm trying to figure out in Erlang how to write unit tests for module
>> ma that do not depend on the particular
>> implementation of functions in module mb.
>
> Hi,
>
> One simple way is to use conditional compilation; in ma use
>
> -ifdef(TEST).
>    -include_lib("eunit/include/eunit.hrl").
>    -define(MB, mock_mb).
> -else.
>    -define(MB, mb).
> -endif.
>
> and make all calls to mb via ?MB. (Of course, you'll have to implement
> a mock_mb module).
>
>
> A more advanced way would be to have a central mock server where you
> can register a fun for each mocked function (in any module) and use
> error_handler:undefined_function to use these registered funs instead
> of the real ones. This is quite complex to implement, though.
>
> best regards,
> Vlad
>
> ________________________________________________________________
> erlang-questions (at) erlang.org mailing list.
> See http://www.erlang.org/faq.html
> To unsubscribe; mailto:
>
>


More information about the erlang-questions mailing list