Rails - Aug 2007 - How to access controller's instance variables in integration tests?

In my controller''s action I set instance variables like:

    @last_action = xxx
    @paid_with_card = xxx

Now, how do I access them in my integration tests? I tried Mike
Clark''s example(1):
   assert_not_nil assigns(:paid_with_card)

But my test fails:
============start test output=====Started
...................F..
Finished in 17.906 seconds.

  1) Failure:
test_select_and_buy_pack(AllPagesTest)
    [./test/integration/all_pages_test.rb:27:in
`test_select_and_buy_pack''
     c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/
action_controller/integration.rb:453:in `run'']:
<nil> expected to not be nil.


22 tests, 63 assertions, 2 failures, 0 errors
============end  test output=====

What can I do to access these variables? What do I get wrong here?
What am I missing? How do you actually read instance variables from
the controller in the integration tests?????

Thanks in advance!
/Jesper Rønn-Jensen,
www.justaddwater.dk

PS I have also tried these that don''t seem to work either:
    # controller.instance_variable_get("@paid_with_card")
    # controller.assigns(:paid_with_card)
    # controller.assigns[:paid_with_card]
    # assigns[:paid_with_card]


(1) Mike Clark''s example: http://clarkware.com/cgi/blosxom/2006/04/04


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Jesper Rønn-Jensen wrote:
> In my controller''s action I set instance variables like:
>
>     @last_action = xxx
>     @paid_with_card = xxx
>
> Now, how do I access them in my integration tests? I tried Mike
> Clark''s example(1):
>    assert_not_nil assigns(:paid_with_card)
>
> But my test fails:
> ============start test output=====> Started
> ...................F..
> Finished in 17.906 seconds.
>
>   1) Failure:
> test_select_and_buy_pack(AllPagesTest)
>     [./test/integration/all_pages_test.rb:27:in
> `test_select_and_buy_pack''
>      c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/
> action_controller/integration.rb:453:in `run'']:
> <nil> expected to not be nil.
>
>
> 22 tests, 63 assertions, 2 failures, 0 errors
> ============end  test output=====>
>
> What can I do to access these variables? What do I get wrong here?
> What am I missing? How do you actually read instance variables from
> the controller in the integration tests?????
>
> Thanks in advance!
> /Jesper Rønn-Jensen,
> www.justaddwater.dk
>
> PS I have also tried these that don''t seem to work either:
>     # controller.instance_variable_get("@paid_with_card")
>     # controller.assigns(:paid_with_card)
>     # controller.assigns[:paid_with_card]
>     # assigns[:paid_with_card]
>
>
> (1) Mike Clark''s example:
http://clarkware.com/cgi/blosxom/2006/04/04
>
>
> >
>
>   
Try

controller.instance_variable_get(:@paid_with_card)

Hope this helps,
Chris

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> Try
> controller.instance_variable_get(:@paid_with_card)
> Hope this helps,
> Chris
Thanks for your support Chris.
I finally managed to get it working, and inspired by your tip I made
an integration test to test off what works and whatnot. I have
included the non-working examples as well for later reference.

Kind regards,
Jesper Rønn-Jensen
http://justaddwater.dk/

PS. Actually I got it working with the first example I posted:
  assert_not_nil assigns(:paid_with_card)
The catch was to put a
> post_via_redirect :params
> assert_not_nil assigns(:paid_with_card)
instead of
> post :params
> assert_redirected_to
> follow_redirect
> assert_not_nil assigns(:paid_with_card)

========file "/test/integration/test_of_assigns.rb"
below===========require "#{File.dirname(__FILE__)}/../test_helper"
# This test requires a root route pointed to a controller for the
default action
# controller#index responding to "/"
#
# Index action must contain setting of the instance variable @sub
(value: anything but nil)
#   @sub
#
# Run this file separately with
#   ruby test_of_assigns.rb
#
class AssignOperatorTest < ActionController::IntegrationTest
  fixtures :whatever

  def test_front_page_1_works
    get "/"
    assert_response :success
    assert_not_nil assigns(:sub)
  end

  def test_front_page_2_works
    get "/"
    assert_not_nil controller.instance_variable_get("@sub")
  end

  def test_front_page_3_works
    get "/"
    assert_not_nil controller.instance_variable_get(:@sub)
  end

  def test_front_page_4_failure
    get "/"
    assert_not_nil controller.assigns[:sub]
  end

  def test_front_page_5_error
    get "/"
    assert_not_nil controller.instance_variable_get(:sub)
  end

  def test_front_page_6_error
    get "/"
    assert_not_nil controller.instance_variable_get[:sub]
  end

  def test_front_page_7_error
    get "/"
    assert_not_nil controller.assigns("@sub")
  end

  def test_front_page_8_error
    get "/"
    assert_not_nil controller.assigns(:sub)
  end

end
#
# ruby script\about
# About your application''s environment
# Ruby version                 1.8.6 (i386-mswin32)
# RubyGems version             0.9.2
# Rails version                1.2.3
# Active Record version        1.15.3
# Action Pack version          1.13.3
# Action Web Service version   1.2.3
# Action Mailer version        1.3.3
# Active Support version       1.4.2
# Application root             C:/Documents and Settings/Administrator/
My Documents/rails/tmp
# Environment                  development
# Database adapter             sqlite3
# Database schema version      19


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