to work in contexts like rspec before(:all)

Namespace
Methods
T
Instance Public methods
test_request()

Source: show | on GitHub 

# File actionpack/test/controller/integration_test.rb, line 912
def test_request
  with_routing do |routes|
    routes.draw { get ':action' => FooController }
    get '/ok'

    assert_response 200
    assert_equal 'ok', response.body
    assert_equal 'ok', cookies['key']
  end
end