Rails - Dec 2007 - Uninitialized constant in integration test

I am seeing weird issues when trying to create integration tests.  Here
is a very simple example of something that is failing.  The
assert_redirected_to, and other methods, fail with this or similar
exceptions.

I have tried requiring both ''application'' and
''listings_controller'', but
neither solves this problem, although the exception changes.

Anybody know what''s going on here?

Thanks.

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

class FooTest < ActionController::IntegrationTest
  def test_redirect
    get "/"
    assert_redirected_to "/"
  end
end
----


with this exception:


NameError: uninitialized constant ApplicationController
   
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.0.1/lib/active_support/dependencies.rb:266:in
`load_missing_constant''
   
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.0.1/lib/active_support/dependencies.rb:453:in
`const_missing''
   
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.0.1/lib/active_support/dependencies.rb:465:in
`const_missing''
    /Users/.../trunk/rails/app/controllers/listings_controller.rb:3
   
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.0.1/lib/active_support/dependencies.rb:203:in
`load_without_new_constant_marking''
   
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.0.1/lib/active_support/dependencies.rb:203:in
`load_file''
   
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.0.1/lib/active_support/dependencies.rb:342:in
`new_constants_in''
   
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.0.1/lib/active_support/dependencies.rb:202:in
`load_file''
   
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.0.1/lib/active_support/dependencies.rb:94:in
`require_or_load''
   
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.0.1/lib/active_support/dependencies.rb:248:in
`load_missing_constant''
   
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.0.1/lib/active_support/dependencies.rb:453:in
`const_missing''
   
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.0.1/lib/active_support/dependencies.rb:465:in
`const_missing''
   
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.0.1/lib/active_support/inflector.rb:257:in
`constantize''
   
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.0.1/lib/active_support/core_ext/string/inflections.rb:148:in
`constantize''
   
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.0.1/lib/action_controller/routing.rb:1423:in
`recognize''
   
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.0.1/lib/action_controller/assertions/routing_assertions.rb:138:in
`recognized_request_for''
   
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.0.1/lib/action_controller/assertions/response_assertions.rb:70:in
`assert_redirected_to''
   
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.0.1/lib/action_controller/assertions/response_assertions.rb:62:in
`each''
   
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.0.1/lib/action_controller/assertions/response_assertions.rb:62:in
`assert_redirected_to''
   
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.0.1/lib/action_controller/assertions.rb:54:in
`clean_backtrace''
   
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.0.1/lib/action_controller/assertions/response_assertions.rb:54:in
`assert_redirected_to''
    test/integration/foo_test.rb:6:in `test_redirect''
   
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.0.1/lib/action_controller/integration.rb:532:in
`run''
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Slight correction.  In the above case, require
''listings_controller''
allows it to work.  However if I add a second test as in this:

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

class FooTest < ActionController::IntegrationTest

  def test_redirect
    get "/"
    assert_redirected_to "/"
  end

  def test_foo
    get "/"
    assert_redirected_to "/"
  end
end


Then I get exceptions like this:

ArgumentError (A copy of ApplicationController has been removed from the 
module tree but is still active!):
   
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.0.1/lib/active_support/dependencies.rb:237:in
`load_missing_constant''
   
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.0.1/lib/active_support/dependencies.rb:469:in
`const_missing''
    /app/controllers/application.rb:75:in `prepare_session''
   
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.0.1/lib/action_controller/filters.rb:469:in
`send!''
   
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.0.1/lib/action_controller/filters.rb:469:in
`call''
...
   
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.0.1/lib/action_controller/integration.rb:157:in
`get''
   
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.0.1/lib/action_controller/integration.rb:382:in
`send!''
   
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.0.1/lib/action_controller/integration.rb:382:in
`get''
    test/integration/foo_test.rb:7:in `test_redirect''
    /usr/local/lib/ruby/1.8/test/unit/testcase.rb:78:in `__send__''
    /usr/local/lib/ruby/1.8/test/unit/testcase.rb:78:in `run''
   
/usr/local/lib/ruby/gems/1.8/gems/actionpack-2.0.1/lib/action_controller/integration.rb:532:in
`run''

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