Rails - Jan 2006 - How to test a failing transaction

Hi,

I was wondering if somebody knows how I can make a transaction fail, so 
I can test my rescue code. So a very basic transaction:

      begin
        Listing.transaction(@ad) do

          if @ad.save
            flash[:notice] = ''Ad was successfully created.''
            redirect_to :action => ''list''
          else
            render :action => ''new''
          end
        end
      rescue => error
        flash[:warning] = ''An error has occurred''
        redirect_to :action => ''new''
      end

But I want to test that I get redirected to ''new'' and have a
flash
message. All suggestions are welcome.

Kind regards,

Nick

-- 
Posted via http://www.ruby-forum.com/.

On 1/7/06, Nick Snels <nick.snels@gmail.com>
wrote:
> Hi,
>
> I was wondering if somebody knows how I can make a transaction fail, so
> I can test my rescue code. So a very basic transaction:
>
>       begin
>         Listing.transaction(@ad) do
>
>           if @ad.save
>             flash[:notice] = ''Ad was successfully
created.''
>             redirect_to :action => ''list''
>           else
>             render :action => ''new''
>           end
>         end
>       rescue => error
>         flash[:warning] = ''An error has occurred''
>         redirect_to :action => ''new''
>       end
>
> But I want to test that I get redirected to ''new'' and
have a flash
> message. All suggestions are welcome.
>
> Kind regards,
>
> Nick
>
use @ad.save! and pass in some data to  make the data invalid in your
test.  Be sure to use the uses_transaction method in your unit test
(or turn off transactional fixtures) when testing this.  You typically
can''t have nested transactions (depending on DB I believe).

http://weblog.digett.com/2005/07/06/transactional-fixtures-in-ruby-on-rails/

--
rick
http://techno-weenie.net