How best to test modules for 'mixing-in' with AR classes?

Rails
1

Hi,

I’m converting some AR classes into modules and moving their
attributes to whatever AR classes formerly held the association.

I’m finding it hard to test these modules.

I think I want to use a tableless AR model in my module tests. I just
define one of these – with the attributes the module needs – in the
test file and use it in the test. This works, but not for all AR
methods. In particular, I run into errors when I invoke certain AR
methods that seem to require the presence of a table.

So, simply put, how do I get a fully functional AR model for use in
testing, without an accompanying migration?

Any thoughts?

Thanks,

Lille

2

On May 16, 3:37pm, Lille [email protected] wrote:

methods. In particular, I run into errors when I invoke certain AR
methods that seem to require the presence of a table.

So, simply put, how do I get a fully functional AR model for use in
testing, without an accompanying migration?

not entirely what you ask, but how about creating an in memory
sqlite3 database and creating tables in there (you don’t need a
migration file - you can have the table creating stuff in your test’s
setup) ?

Fred

3

Thanks!

So, maybe I automate the creation of the in-memory database with a
rake task for the test? If not, what do you think?

I think an issue here is that my modules assuming their parents are AR
classes. Is that really modular?

Lille

On May 16, 10:47am, Frederick C. [email protected]

4

On 16 May 2011, at 16:01, Lille [email protected] wrote:

Thanks!

So, maybe I automate the creation of the in-memory database with a
rake task for the test? If not, what do you think?

I think an issue here is that my modules assuming their parents are AR
classes. Is that really modular?

Depends on what your code does - if it is inherently very active-recordy
stuff then that’s probably ok. If it is legitimate to include the module
in a non activerecord class then I’d aim to do that in tests too.

Fred.