Rspec-core: RSpec::ExampleGroups에 대한 정의되지 않은 메서드 '컨트롤러'

rspec-rails (3.0.0.beta2) 에서 rspec-rails (3.0.0.rc1)

투기

require 'spec_helper'
describe ApplicationController do
  controller do
    def index
      render :text => 'Ok'
    end

    def show
      raise TypeError, 'Any fake value!'
    end
  end

  it "redirects to new_sessions_path" do
    get :index
    expect(response).to redirect_to(new_session_path)
  end
end

오류

spec/controllers/application_controller_spec.rb:5:in `block (2 levels) in <top (required)>': undefined method `controller' for #<Class:0x007fed8fe69180> (NoMethodError)
    from /Users/ankitgupta/.rvm/gems/ruby-2.1.1/gems/rspec-core-3.0.0.rc1/lib/rspec/core/example_group.rb:331:in `module_exec'
    from /Users/ankitgupta/.rvm/gems/ruby-2.1.1/gems/rspec-core-3.0.0.rc1/lib/rspec/core/example_group.rb:331:in `subclass'
    from /Users/ankitgupta/.rvm/gems/ruby-2.1.1/gems/rspec-core-3.0.0.rc1/lib/rspec/core/example_group.rb:227:in `block in define_example_group_method'
    from /Users/ankitgupta/Documents/projects/work/my-development/spec/controllers/application_controller_spec.rb:4:in `block in <top (required)>'
    from /Users/ankitgupta/.rvm/gems/ruby-2.1.1/gems/rspec-core-3.0.0.rc1/lib/rspec/core/example_group.rb:331:in `module_exec'
    from /Users/ankitgupta/.rvm/gems/ruby-2.1.1/gems/rspec-core-3.0.0.rc1/lib/rspec/core/example_group.rb:331:in `subclass'
    from /Users/ankitgupta/.rvm/gems/ruby-2.1.1/gems/rspec-core-3.0.0.rc1/lib/rspec/core/example_group.rb:227:in `block in define_example_group_method'
    from /Users/ankitgupta/.rvm/gems/ruby-2.1.1/gems/rspec-core-3.0.0.rc1/lib/rspec/core/dsl.rb:41:in `block in expose_example_group_alias'
    from /Users/ankitgupta/.rvm/gems/ruby-2.1.1/gems/rspec-core-3.0.0.rc1/lib/rspec/core/dsl.rb:79:in `block (2 levels) in expose_example_group_alias_globally'
    from /Users/ankitgupta/Documents/projects/work/my-development/spec/controllers/application_controller_spec.rb:3:in `<top (required)>'
    from /Users/ankitgupta/.rvm/gems/ruby-2.1.1/gems/rspec-core-3.0.0.rc1/lib/rspec/core/configuration.rb:1051:in `load'
    from /Users/ankitgupta/.rvm/gems/ruby-2.1.1/gems/rspec-core-3.0.0.rc1/lib/rspec/core/configuration.rb:1051:in `block in load_spec_files'
    from /Users/ankitgupta/.rvm/gems/ruby-2.1.1/gems/rspec-core-3.0.0.rc1/lib/rspec/core/configuration.rb:1051:in `each'
    from /Users/ankitgupta/.rvm/gems/ruby-2.1.1/gems/rspec-core-3.0.0.rc1/lib/rspec/core/configuration.rb:1051:in `load_spec_files'
    from /Users/ankitgupta/.rvm/gems/ruby-2.1.1/gems/rspec-core-3.0.0.rc1/lib/rspec/core/runner.rb:97:in `setup'
    from /Users/ankitgupta/.rvm/gems/ruby-2.1.1/gems/rspec-core-3.0.0.rc1/lib/rspec/core/runner.rb:85:in `run'
    from /Users/ankitgupta/.rvm/gems/ruby-2.1.1/gems/rspec-core-3.0.0.rc1/lib/rspec/core/runner.rb:70:in `run'
    from /Users/ankitgupta/.rvm/gems/ruby-2.1.1/gems/rspec-core-3.0.0.rc1/lib/rspec/core/runner.rb:38:in `invoke'
    from /Users/ankitgupta/.rvm/gems/ruby-2.1.1/gems/rspec-core-3.0.0.rc1/exe/rspec:4:in `<top (required)>'
    from /Users/ankitgupta/.rvm/gems/ruby-2.1.1/bin/rspec:23:in `load'
    from /Users/ankitgupta/.rvm/gems/ruby-2.1.1/bin/rspec:23:in `<main>'
    from /Users/ankitgupta/.rvm/gems/ruby-2.1.1/bin/ruby_executable_hooks:15:in `eval'
    from /Users/ankitgupta/.rvm/gems/ruby-2.1.1/bin/ruby_executable_hooks:15:in `<main>'