[rspec-users] Mocking Resolv::DNS?

Mikel Lindsaar raasdnil at gmail.com
Tue Jul 24 09:02:38 EDT 2007


Thank you, works perfectly!

Regards

Mikel

On 7/24/07, Pat Maddox <pergesu at gmail.com> wrote:
> On 7/24/07, Mikel Lindsaar <raasdnil at gmail.com> wrote:
> > Hello Rspecers,
> >
> > I have a rails project where I am calling Resolv::DNS.open and then
> > using the block to check a domain name.
> >
> > The code snippet in question is:
> >
> >    domain = "mytest.com"
> >    Resolv::DNS.open do |dns|
> >      @mx = dns.getresources(domain, Resolv::DNS::Resource::IN::MX)
> >    end
> >
> > I obviously want to stub this out, especially for speed but can't
> > quite work out how.
> >
> > I have done:
> >
> > >From what I can tell, Resolv::DNS first is receiving :open and it will
> > then be yielding instances of Resolv::DNS to be using inside the
> > block.
> >
> > So, my last unsuccessfull attempt at mocking this out is:
> >
> >     @dns = mock(Resolv::DNS)
> >     Resolv::DNS.should_receive(:open).and_return([@dns])
> >     @dns.should_receive(:getresources).and_return("MX Record")
> >
> > The errors I am getting are not about mocks receiving unexpected
> > messages.  The :open message mock gets called.  The second one (on
> > @dns.should_receive(:getresources) also does not complain.
> >
> > But @mx in the above code ends up as nil, when I would think it should
> > end up as "MX Record".
> >
> > Any pointers?
> >
> > Regards
> >
> > Mikel
> >
> > --
> > http://www.blognow.com.au/q
> > _______________________________________________
> > rspec-users mailing list
> > rspec-users at rubyforge.org
> > http://rubyforge.org/mailman/listinfo/rspec-users
> >
>
> I'm not sure if this will work, but try
>
> Resolv::DNS.should_receive(:open).and_yield(@dns)
>
> Pat
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