rspec users - Apr 2007 - Extending assigns in controller specs?

Hello,
  I am interested in enhancing assigns in controller specs to do
things like the following

assigns[:key1, :key2, :key3] #=> vals for keys

Is there away to "break open" this construction to overload the :[]
operator?

Thanks.

-Chris

One method would be to:

1. figure out the class
2. reopen the class,
3. alias the method,
4. use your method if multiple keys are given, use the old aliased  
method if not.

Don''t know if assigns might have some metaclass trickery, though.   
Post what you find.  I''d be interested.

As for spec''ing it out, first:

require File.dirname(__FILE__) + "/..."

class MyController < ActionController
   def single_var
     @var = "var"
   end

   def multi_var
     @var1 = 1
     @var2 = 2
   end
end

describe "MyController''s single_var" do
   controller_name :my_controller

   setup do
     get :single_var
   end

   it "should assign one variable" do
     assign[:var].should == "var"
   end
end

describe "MyController''s multi_var" do

   ...

   it "should assign multi variables" do
     assign[:var1, :var2].should == [1, 2]
   end
end


Obviously you can use more descriptive names than I have here.  But I  
hope you can see where I''m going with this.

Scott


On Apr 5, 2007, at 8:55 AM, Chris Hoffman wrote:
> Hello,
>   I am interested in enhancing assigns in controller specs to do
> things like the following
>
> assigns[:key1, :key2, :key3] #=> vals for keys
>
> Is there away to "break open" this construction to overload the
:[]
> operator?
>
> Thanks.
>
> -Chris
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users

On 4/5/07, Scott Taylor <mailing_lists at railsnewbie.com>
wrote:
>
> One method would be to:
>
> 1. figure out the class
> 2. reopen the class,
> 3. alias the method,
> 4. use your method if multiple keys are given, use the old aliased
> method if not.
>
> Don''t know if assigns might have some metaclass trickery, though.
> Post what you find.  I''d be interested.
>
> As for spec''ing it out, first:
>
> require File.dirname(__FILE__) + "/..."
>
> class MyController < ActionController
>    def single_var
>      @var = "var"
>    end
>
>    def multi_var
>      @var1 = 1
>      @var2 = 2
>    end
> end
>
> describe "MyController''s single_var" do
>    controller_name :my_controller
>
>    setup do
>      get :single_var
>    end
>
>    it "should assign one variable" do
>      assign[:var].should == "var"
>    end
> end
>
> describe "MyController''s multi_var" do
>
>    ...
>
>    it "should assign multi variables" do
>      assign[:var1, :var2].should == [1, 2]
>    end
> end
assigns is available before and after the action so you don''t really
need an action to spec this:

it "should assign a single var" do
  assigns[:a] = ''b''
  assigns[:a].should == ''b''
end

it "should assign multiple vars" do
  assigns[:a, :b] = ''c'', ''d''
  assigns[:a].should == ''c''
  assigns[:b].should == ''d''
end

The class is IvarProxy, which is actually left over from ZenTest,
which an earlier version of Spec::Rails wrapped.

Cheers,
David
>
>
> Obviously you can use more descriptive names than I have here.  But I
> hope you can see where I''m going with this.
>
> Scott
>
>
> On Apr 5, 2007, at 8:55 AM, Chris Hoffman wrote:
>
> > Hello,
> >   I am interested in enhancing assigns in controller specs to do
> > things like the following
> >
> > assigns[:key1, :key2, :key3] #=> vals for keys
> >
> > Is there away to "break open" this construction to overload
the :[]
> > operator?
> >
> > Thanks.
> >
> > -Chris
> > _______________________________________________
> > 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
>

That''s just the information for which I was looking.  Thanks to both of
you.

On 4/5/07, David Chelimsky <dchelimsky at gmail.com>
wrote:
> On 4/5/07, Scott Taylor <mailing_lists at railsnewbie.com> wrote:
> >
> > One method would be to:
> >
> > 1. figure out the class
> > 2. reopen the class,
> > 3. alias the method,
> > 4. use your method if multiple keys are given, use the old aliased
> > method if not.
> >
> > Don''t know if assigns might have some metaclass trickery,
though.
> > Post what you find.  I''d be interested.
> >
> > As for spec''ing it out, first:
> >
> > require File.dirname(__FILE__) + "/..."
> >
> > class MyController < ActionController
> >    def single_var
> >      @var = "var"
> >    end
> >
> >    def multi_var
> >      @var1 = 1
> >      @var2 = 2
> >    end
> > end
> >
> > describe "MyController''s single_var" do
> >    controller_name :my_controller
> >
> >    setup do
> >      get :single_var
> >    end
> >
> >    it "should assign one variable" do
> >      assign[:var].should == "var"
> >    end
> > end
> >
> > describe "MyController''s multi_var" do
> >
> >    ...
> >
> >    it "should assign multi variables" do
> >      assign[:var1, :var2].should == [1, 2]
> >    end
> > end
>
> assigns is available before and after the action so you don''t
really
> need an action to spec this:
>
> it "should assign a single var" do
>   assigns[:a] = ''b''
>   assigns[:a].should == ''b''
> end
>
> it "should assign multiple vars" do
>   assigns[:a, :b] = ''c'', ''d''
>   assigns[:a].should == ''c''
>   assigns[:b].should == ''d''
> end
>
> The class is IvarProxy, which is actually left over from ZenTest,
> which an earlier version of Spec::Rails wrapped.
>
> Cheers,
> David
>
> >
> >
> > Obviously you can use more descriptive names than I have here.  But I
> > hope you can see where I''m going with this.
> >
> > Scott
> >
> >
> > On Apr 5, 2007, at 8:55 AM, Chris Hoffman wrote:
> >
> > > Hello,
> > >   I am interested in enhancing assigns in controller specs to do
> > > things like the following
> > >
> > > assigns[:key1, :key2, :key3] #=> vals for keys
> > >
> > > Is there away to "break open" this construction to
overload the :[]
> > > operator?
> > >
> > > Thanks.
> > >
> > > -Chris
> > > _______________________________________________
> > > 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
> >
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>