first try to make a controller test with RSpec on rails

Hello, I'm trying to create a controller test with RSpec but I get the
error when I run

spec login_controller_spec.rb --format specdoc

../../app/controllers/application.rb:4: uninitialized constant
ActionController (NameError)
        from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:
27:in
`gem_original_require'
        from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:
27:in
`require'
        from ./login_controller_spec.rb:9
        from
/usr/lib/ruby/gems/1.8/gems/rspec-1.1.4/lib/spec/runner/
example_group_runner.rb:14:in
`load'
        from
/usr/lib/ruby/gems/1.8/gems/rspec-1.1.4/lib/spec/runner/
example_group_runner.rb:14:in
`load_files'
        from
/usr/lib/ruby/gems/1.8/gems/rspec-1.1.4/lib/spec/runner/
example_group_runner.rb:13:in
`each'
        from
/usr/lib/ruby/gems/1.8/gems/rspec-1.1.4/lib/spec/runner/
example_group_runner.rb:13:in
`load_files'
        from
/usr/lib/ruby/gems/1.8/gems/rspec-1.1.4/lib/spec/runner/options.rb:
98:in
`run_examples'
        from
/usr/lib/ruby/gems/1.8/gems/rspec-1.1.4/lib/spec/runner/
command_line.rb:19:in
`run'
        from /usr/lib/ruby/gems/1.8/gems/rspec-1.1.4/bin/spec:4
        from /usr/bin/spec:19:in `load'
        from /usr/bin/spec:19

Here is my login_controller_spec :