mocha developer - Jul 2007 - Object.stubs doesn''t seem to work.

Hi

I''m using Mocha 0.5.3 and I want to stub out a call to Time.now, just
like the example in the post
http://blog.floehopper.org/articles/2007/06/08/mocha-0-5-released

However, trying it in irb gets me the following error:
>> require ''mocha''
=> true
>> Time.stubs(:now).returns(Time.parse(''Thu Feb 01 00:00:00 UTC
2007''))
NoMethodError: undefined method `stub'' for nil:NilClass
        from /usr/lib/ruby/gems/1.8/gems/mocha-0.5.3/lib/mocha/object.rb:57:in
`stubs''
        from (irb):2

Has this way of stubbing been depreciated between 0.5.0 and 0.5.3, and
if so, what is the new way of stubbing for an Object.method ?

Regards
Jonathan

Hi Jonathan,

You need to use Mocha in the context of a Test::Unit::TestCase (or an RSpec
specification).

The blog post missed this out to improve the signal-to-noise ratio.

require ''rubygems''
require ''mocha''
require ''test/unit''

class TimeTest < Test::Unit::TestCase

  def test_time_now
    Time.stubs(:now).returns(Time.parse(''Thu Feb 01 00:00:00 UTC
2007''))
    assert_equal Time.parse(''Thu Feb 01 00:00:00 UTC 2007''),
Time.now
  end

end

The reason it needs to be within a TestCase or similar is because Mocha
temporarily modifies the Time class for the duration of the test and needs a
hook to put it back how it was.

I hope that makes sense.
-- 
James.
http://blog.floehopper.org

Ah, yes, thank you!

I feel a little foolish now.  It hadn''t occured to me it needed to be
in a TestCase when I set out to test it a little first in irb.

Thanks for the quick response
Jonathan

Hi, I''m trying to stub the login_required() method of the 
acts_as_authenticated plugin in an RoR integration test.
This method is defined in the AuthenticatedSystem module, in the 
lib/authenticated_system.rb

What happen is that the stub have no effect and the real method is still 
executed.

Here is the code. Any idea ?

Thank you



require "#{File.dirname(__FILE__)}/../test_helper"

class CheckStopsiteTest < ActionController::IntegrationTest
  fixtures :users
 
  def test_closed_site
    AuthenticatedSystem.stubs(:login_required).returns(true)
    get ''/admin/maintenance/stop_site''
    assert_response :success
    get ''/fr/site''
    assert_redirected_to :controller => ''site'', :action
=> ''closed_site''
  end
 
end

SiteController.any_instance.stubs(:login_required).returns(true)

perhaps?

On 9/27/07, Christophe <anaema_ml at yahoo.fr>
wrote:
> Hi, I''m trying to stub the login_required() method of the
> acts_as_authenticated plugin in an RoR integration test.
> This method is defined in the AuthenticatedSystem module, in the
> lib/authenticated_system.rb
>
> What happen is that the stub have no effect and the real method is still
> executed.
>
> Here is the code. Any idea ?
>
> Thank you
>
>
>
> require "#{File.dirname(__FILE__)}/../test_helper"
>
> class CheckStopsiteTest < ActionController::IntegrationTest
>   fixtures :users
>
>   def test_closed_site
>     AuthenticatedSystem.stubs(:login_required).returns(true)
>     get ''/admin/maintenance/stop_site''
>     assert_response :success
>     get ''/fr/site''
>     assert_redirected_to :controller => ''site'',
:action => ''closed_site''
>   end
>
> end
> _______________________________________________
> mocha-developer mailing list
> mocha-developer at rubyforge.org
> http://rubyforge.org/mailman/listinfo/mocha-developer
>

Unfortunately I already tried this too - And it doesn''t work...


le 28/09/2007 01:10, Duncan Beevers nous a dit:
> SiteController.any_instance.stubs(:login_required).returns(true)
>
> perhaps?
>
> On 9/27/07, Christophe <anaema_ml at yahoo.fr> wrote:
>   
>> Hi, I''m trying to stub the login_required() method of the
>> acts_as_authenticated plugin in an RoR integration test.
>> This method is defined in the AuthenticatedSystem module, in the
>> lib/authenticated_system.rb
>>
>> What happen is that the stub have no effect and the real method is
still
>> executed.
>>
>> Here is the code. Any idea ?
>>
>> Thank you
>>
>>
>>
>> require "#{File.dirname(__FILE__)}/../test_helper"
>>
>> class CheckStopsiteTest < ActionController::IntegrationTest
>>   fixtures :users
>>
>>   def test_closed_site
>>     AuthenticatedSystem.stubs(:login_required).returns(true)
>>     get ''/admin/maintenance/stop_site''
>>     assert_response :success
>>     get ''/fr/site''
>>     assert_redirected_to :controller => ''site'',
:action => ''closed_site''
>>   end
>>
>> end
>>

On 27/09/2007, Christophe <anaema_ml at yahoo.fr>
wrote:
>
> Hi, I''m trying to stub the login_required() method of the
> acts_as_authenticated plugin in an RoR integration test.
> This method is defined in the AuthenticatedSystem module, in the
> lib/authenticated_system.rb
>
> What happen is that the stub have no effect and the real method is still
> executed.
>
> Here is the code. Any idea ?
>
> Thank you
>
>
>
> require "#{File.dirname(__FILE__)}/../test_helper"
>
> class CheckStopsiteTest < ActionController::IntegrationTest
>   fixtures :users
>
>   def test_closed_site
>     AuthenticatedSystem.stubs(:login_required).returns(true)
>     get ''/admin/maintenance/stop_site''
>     assert_response :success
>     get ''/fr/site''
>     assert_redirected_to :controller => ''site'',
:action => ''closed_site''
>   end
>
> end

Sorry not to reply sooner - I''ve been away on holiday.

It''s a while since I looked at acts_as_authenticated, but I suspect the
problem is that the login_required method is a module *instance* method and
not a module method. This means you need to stub the method on the instance
into which it has been mixed - probably the controller in this case. The
difference between stubbing a module method and a module instance method is
probably best explained by a couple of quick examples - see
http://pastie.caboo.se/103234.

In your test, I suspect you need to do something like...

def test_closed_site
  @controller.stubs(:login_required).returns(true)
  get ''/admin/maintenance/stop_site''
  assert_response :success
  get ''/fr/site''
  assert_redirected_to :controller => ''site'', :action =>
''closed_site''
end

I hope that solves your problem. Let me know if not.

One last thought - are you sure it makes sense to stub within an
"integration" test?
-- 
James.
http://blog.floehopper.org
http://tumble.floehopper.org