rspec users - Oct 2007 - Easy AR association stubbing

I''ve added a method to the mock class that makes it pretty easy to
stub associations in rails. I''ve been using it for awhile and it seems
to cut down on a lot of setup code for the controller and model specs
that use associations.

#before
@person = mock_model(Person)
posts = mock(''post_proxy'')
posts.stub!(:build).and_return(mock_model(Post, :save => true))
@person.stub!(:posts).and_return(posts)


# now
@person = mock_model(Person)
@person.stub_association!(:posts, :find_by_title => mock_model(Post))


Just add this to the spec helper

module Spec
  module Mocks
    module Methods
      def stub_association!(association_name, methods_to_be_stubbed = {})
        mock_association = Spec::Mocks::Mock.new(association_name.to_s)
        methods_to_be_stubbed.each do |method, return_value|
          mock_association.stub!(method).and_return(return_value)
        end
        self.stub!(association_name).and_return(mock_association)
      end
    end
  end
end

Thanks I''ll give it a try and praise you later.
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But what if I need to use posts as such?

@person = mock_model(Person)
@person.stub_association!(:posts, :find_by_title => mock_model(Post))

posts.stub!(:count).and_return(2)
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On 10/6/07, Andrew WC Brown <omen.king at gmail.com>
wrote:
> But what if I need to use posts as such?
>
> @person = mock_model(Person)
> @person.stub_association!(:posts, :find_by_title => mock_model(Post))
>
> posts.stub!(:count).and_return(2)
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>
Take a look at the source: you can pass in whatever methods you want
to be stubbed.  So, for example,

@person.stub_association!(:posts, :find_by_title => mock_model(Post),
:count => 2)

Also, you should be able to stub after the fact like so:

@person.posts.stub!(:count).and_return 2

Pat

Here''s my old association:

    @game = mock_game(:to_param => "1")
    Game.stub!(:find).and_return(@game)
    @players = mock(''player_proxy'')
    @players.stub!(:build).and_return(mock_model(Player, :save => true))
    @game.stub!(:players).and_return(@players)

Here''s one of my specs:

  it "should assign the found players for the view" do
    do_get
    assigns[:players].should eql(@players)

  end

Everything works great. So I try to use assoication_stub!

    @game = mock_game(:to_param => "1")
    Game.stub!(:find).and_return(@game)
    @game.stub_association!(:players, :build => mock_model(Player, :save
=>
true))

1)
''PlayersController handling GET /saltmines/games/1/players should
assign the
found players for the view'' FAILED
expected nil, got #<Spec::Mocks::Mock:0x1a53358 @name="players">
(using
.eql?)
/Volumes/EXTERNAL/web/omenking.ca/spec/controllers/players_controller_spec.rb:103:
/Volumes/EXTERNAL/web/omenking.ca/spec/controllers/players_controller_spec.rb:63:



Any suggestions?

On 10/6/07, Pat Maddox <pergesu at gmail.com>
wrote:
>
> On 10/6/07, Andrew WC Brown <omen.king at gmail.com> wrote:
> > But what if I need to use posts as such?
> >
> > @person = mock_model(Person)
> > @person.stub_association!(:posts, :find_by_title =>
mock_model(Post))
> >
> > posts.stub!(:count).and_return(2)
> >
> > _______________________________________________
> > rspec-users mailing list
> > rspec-users at rubyforge.org
> > http://rubyforge.org/mailman/listinfo/rspec-users
> >
>
> Take a look at the source: you can pass in whatever methods you want
> to be stubbed.  So, for example,
>
> @person.stub_association!(:posts, :find_by_title => mock_model(Post),
> :count => 2)
>
> Also, you should be able to stub after the fact like so:
>
> @person.posts.stub!(:count).and_return 2
>
> Pat
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>
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you no longer have @players

try
assigns[:players].should eql(@game.players)

On 10/8/07, Andrew WC Brown <omen.king at gmail.com>
wrote:
> Here''s my old association:
>
>     @game = mock_game(:to_param => "1")
>     Game.stub!(:find).and_return(@game)
>     @players = mock(''player_proxy'')
>     @players.stub!(:build).and_return(mock_model(Player,
> :save => true))
>     @game.stub!(:players).and_return(@players)
>
> Here''s one of my specs:
>
>   it "should assign the found players for the view" do
>     do_get
>     assigns[:players].should eql(@players)
>
>   end
>
> Everything works great. So I try to use assoication_stub!
>
>     @game = mock_game(:to_param => "1")
>     Game.stub!(:find).and_return(@game)
>     @game.stub_association!(:players, :build => mock_model(Player, :save
=>
> true))
>
> 1)
> ''PlayersController handling GET /saltmines/games/1/players should
assign the
> found players for the view'' FAILED
> expected nil, got #<Spec::Mocks::Mock:0x1a53358
@name="players"> (using
> .eql?)
>
/Volumes/EXTERNAL/web/omenking.ca/spec/controllers/players_controller_spec.rb:103:
>
/Volumes/EXTERNAL/web/omenking.ca/spec/controllers/players_controller_spec.rb:63:
>
>
>
> Any suggestions?
>
>
>  On 10/6/07, Pat Maddox <pergesu at gmail.com> wrote:
> > On 10/6/07, Andrew WC Brown <omen.king at gmail.com> wrote:
> > > But what if I need to use posts as such?
> > >
> > > @person = mock_model(Person)
> > > @person.stub_association! (:posts, :find_by_title =>
mock_model(Post))
> > >
> > > posts.stub!(:count).and_return(2)
> > >
> > > _______________________________________________
> > > rspec-users mailing list
> > > rspec-users at rubyforge.org
> > > http://rubyforge.org/mailman/listinfo/rspec-users
> > >
> >
> > Take a look at the source: you can pass in whatever methods you want
> > to be stubbed.  So, for example,
> >
> > @person.stub_association!(:posts, :find_by_title =>
mock_model(Post),
> > :count => 2)
> >
> > Also, you should be able to stub after the fact like so:
> >
> > @person.posts.stub! (:count).and_return 2
> >
> > Pat
> > _______________________________________________
> > rspec-users mailing list
> > rspec-users at rubyforge.org
> > http://rubyforge.org/mailman/listinfo/rspec-users
> >
>
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>

On 10/5/07, Andrew WC Brown <omen.king at gmail.com>
wrote:
> I''ve added a method to the mock class that makes it pretty easy to
> stub associations in rails. I''ve been using it for awhile and it
seems
> to cut down on a lot of setup code for the controller and model specs
> that use associations.
Hi Matthew,

Thanks for this tip. I tried refactoring my subdomain as account keys  
spec (http://rubyforge.org/pipermail/rspec-users/2007-October/ 
004157.html) with stub_association!, but am having some trouble.

Here''s my setup method:

   before do
     @request.host = "subdomain.test.host"
     @item = mock_model(Item)
     Item.stub!(:find).and_return(@item)
     @current_company = mock_model(Company)
     @current_company.stub_association!(:items, :find => [@item])
   end

   it "should find the item requested" do
    
@current_company.should_receive(:find).with("1").and_return(@item)
     do_get
   end

... fails with:
Mock ''Company_1005'' expected :find with ("1") once,
but received it 0
times


I''m using subdomains as account keys, as in my code example here:  
http://rubyforge.org/pipermail/rspec-users/2007-October/004157.html

Thanks!

- Ryan Heneise

try:   it "should find the item requested" do
   
@current_company.items.should_receive(:find).with("1").and_return(@item)
    do_get
  end


-Matt
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