My app is builded with rails 2.3.12, rspec-rails 1.3.2, webrat 0.7.3.
My spec_helper.rb
ENV["RAILS_ENV"] ||= ''test''
require
File.expand_path(File.join(File.dirname(__FILE__),''..'',''config'',''environment''))
require ''spec/autorun''
require ''spec/rails''
require ''webrat''
Dir[File.expand_path(File.join(File.dirname(__FILE__),''support'',''**'',''*.rb''))].each
{|f| require f}
Webrat.configure do |config|
  config.mode = :rails
  config.open_error_files = false # prevents webrat from opening the
browser
end
# Uncomment the next line to use webrat''s matchers
require ''webrat/integrations/rspec-rails''
Spec::Runner.configure do |config|
  config.use_transactional_fixtures = true
  config.use_instantiated_fixtures  = false
  config.fixture_path = RAILS_ROOT + ''/spec/fixtures/''
  include Webrat::Methods
#config.include Webrat::Matchers, :type => :views
end
My spec:
require ''spec_helper''
describe "Campaign" do
  describe "in first step" do
    before(:each) do
      @user = Factory(:user)
      @campaign = Factory(:campaign, :owner => @user)
    end
    it "should have an owner" do
      @campaign.owner.should == @user
    end
    it "testing request" do
      visit "/"
    end
  end
end
I get:
ActionView::TemplateError in ''Campaign in first step should have an
owner''
super: no superclass method `response'' for #<DeviseMailer:
0x7f29a3a07610>
In app/views/devise_mailer/confirmation_instructions.html.erb
    webrat (0.7.3) lib/webrat/core/methods.rb:31:in `response''
    /usr/lib/ruby/gems/1.8/gems/rspec-rails-1.3.2/lib/spec/rails/
extensions/action_view/base.rb:27:in `render''
    devise (1.0.9) app/models/devise_mailer.rb:42:in
`render_with_scope''
    devise (1.0.9) app/models/devise_mailer.rb:31:in `setup_mail''
    devise (1.0.9) app/models/devise_mailer.rb:7:in
`confirmation_instructions''
    devise (1.0.9) lib/devise/models/confirmable.rb:61:in
`send_confirmation_instructions''
    /usr/lib/ruby/gems/1.8/gems/factory_girl-2.0.3/lib/factory_girl/
proxy/create.rb:9:in `result''
    /usr/lib/ruby/gems/1.8/gems/factory_girl-2.0.3/lib/factory_girl/
factory.rb:86:in `run''
    /usr/lib/ruby/gems/1.8/gems/factory_girl-2.0.3/lib/factory_girl/
syntax/methods.rb:54:in `create''
    /usr/lib/ruby/gems/1.8/gems/factory_girl-2.0.3/lib/factory_girl/
syntax/vintage.rb:53:in `send''
    /usr/lib/ruby/gems/1.8/gems/factory_girl-2.0.3/lib/factory_girl/
syntax/vintage.rb:53:in `default_strategy''
    /usr/lib/ruby/gems/1.8/gems/factory_girl-2.0.3/lib/factory_girl/
syntax/vintage.rb:146:in `Factory''
    spec/models/campaign_spec.rb:7
    rspec (1.3.0) lib/spec/example/example_methods.rb:74:in
`instance_eval''
    rspec (1.3.0) lib/spec/example/example_methods.rb:74:in
`eval_each_fail_fast''
    rspec (1.3.0) lib/spec/example/example_methods.rb:74:in `each''
    rspec (1.3.0) lib/spec/example/example_methods.rb:74:in
`eval_each_fail_fast''
    rspec (1.3.0) lib/spec/example/example_group_hierarchy.rb:17:in
`run_before_each''
    rspec (1.3.0) lib/spec/example/example_methods.rb:107:in
`run_before_each''
    rspec (1.3.0) lib/spec/example/example_methods.rb:128:in
`before_each_example''
    rspec (1.3.0) lib/spec/example/example_methods.rb:39:in `execute''
    /usr/lib/ruby/1.8/timeout.rb:53:in `timeout''
    rspec (1.3.0) lib/spec/example/example_methods.rb:37:in `execute''
    rspec (1.3.0) lib/spec/example/example_group_methods.rb:214:in
`run_examples''
    rspec (1.3.0) lib/spec/example/example_group_methods.rb:212:in
`each''
    rspec (1.3.0) lib/spec/example/example_group_methods.rb:212:in
`run_examples''
    rspec (1.3.0) lib/spec/example/example_group_methods.rb:103:in
`run''
    rspec (1.3.0) lib/spec/runner/example_group_runner.rb:23:in `run''
    rspec (1.3.0) lib/spec/runner/example_group_runner.rb:22:in `each''
    rspec (1.3.0) lib/spec/runner/example_group_runner.rb:22:in `run''
    rspec (1.3.0) lib/spec/runner/options.rb:152:in `run_examples''
    rspec (1.3.0) lib/spec/runner/command_line.rb:9:in `run''
    rspec (1.3.0) bin/spec:5
    /usr/bin/spec:19:in `load''
    /usr/bin/spec:19