Rails - Mar 2008 - Unitialized constant ActionView::Helpers::TagHelper::Set

Hi all,

 I write the following test to a simple plugin

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

   require File.dirname(__FILE__) + ''/../lib/meta_tags''
   require ''action_view/helpers/tag_helper''

   class MetaTagsTest < Test::Unit::TestCase

    include MetaTagHelper
    include ActionView::Helpers::TagHelper

    . . .

   end

and when I run rake in the root plugin directory I get the following
error

 /usr/bin/ruby18 -Ilib:lib
"/usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake/rake_test_loader.rb"
"test/meta_tags_test.rb"

/usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_view/helpers/tag_helper.rb:11:
uninitialized constant ActionView::Helpers::TagHelper::Set (NameError)

        from
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:32:in
`gem_original_require''

        from
/usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:32:in `require''

        from ./test/meta_tags_test.rb:8


 I forget some require before? somebody can help me? thanks in advance.
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I respond to myself

  require ''set''

 :)

Franco Brusatti wrote:
>  I write the following test to a simple plugin
> 
>    require ''rubygems''
>    require ''test/unit''
> 
>    require File.dirname(__FILE__) + ''/../lib/meta_tags''
>    require ''action_view/helpers/tag_helper''
> 
>    class MetaTagsTest < Test::Unit::TestCase
> 
>     include MetaTagHelper
>     include ActionView::Helpers::TagHelper
> 
>     . . .
> 
> and when I run rake in the root plugin directory I get the following
> error
> 
>  /usr/bin/ruby18 -Ilib:lib
>
"/usr/lib/ruby/gems/1.8/gems/rake-0.8.1/lib/rake/rake_test_loader.rb"
> "test/meta_tags_test.rb"
> 
>
/usr/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_view/helpers/tag_helper.rb:11:
> uninitialized constant ActionView::Helpers::TagHelper::Set (NameError)
> 
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