[rspec-users] Problems with raising errors on a mocked object

David Chelimsky dchelimsky at gmail.com
Wed Aug 8 02:39:21 EDT 2007


On 8/8/07, Eivind Uggedal <eivindu at ifi.uio.no> wrote:
> Here you go: http://pastie.caboo.se/85876

OK - that helped.

The and_raise method can take an exception class or object. If you
pass it the class, it will try to create an instance of it using
Klass.new. This is the source of the problem. In your example we see:

@user.should_receive(:save!).and_raise(ActiveRecord::RecordInvalid)

Rspec tries to call ActiveRecord::RecordInvalid.new, but that requires
an argument, which is why you get an error saying it got 0 for 1
arguments.

Because and_raise can also take an exception object, the solution to
this problem is:

@user.should_receive(:save!).and_raise(ActiveRecord::RecordInvalid.new(@user))

I guess the root of the problem is poor docs - I'm updating the rdoc
now and it will be published with the next release.

Cheers,
David


>
> Eivind
>
> On 8/8/07, David Chelimsky <dchelimsky at gmail.com> wrote:
> > On 8/7/07, Eivind Uggedal <eivindu at ifi.uio.no> wrote:
> > > I'm trying to mock a object to raise a certain error. By doing so I
> > > get a ArgumentError on ActiveRecord's save! method:
> > >
> > > http://pastie.caboo.se/85628
> > >
> > > I've tried to debug it but just can't seem to find what I'm doing
> > > wrong. Any help is greatly appreciated.
> >
> > Please run this:
> >
> > ruby script/spec ./spec/controllers/users_controller_spec.rb -b
> >
> > That will give the complete backtrace for the failure, which I'd ask
> > you to pastie as well.
> >
> > >
> > > Cheers,
> > > Eivind Uggedal
> > > _______________________________________________
> > > rspec-users mailing list
> > > rspec-users at rubyforge.org
> > > http://rubyforge.org/mailman/listinfo/rspec-users
> > >
> > _______________________________________________
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> > rspec-users at rubyforge.org
> > http://rubyforge.org/mailman/listinfo/rspec-users
> >
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