ruby on rails - In a controller spec, how to find a specific tag in the generated view? -

i know integration tests preferred need ran in controller test, i'm testing gem injecting html code in view, xhr can't run in feature spec (if can, please explain me how :) )

so rspec controller tests can assert selector present (with capybara) :

response.body.should have_selector('#foobar') 

has_selector? call all method capybara find selector.

what want last child of body , assert id in particular.

afaik it's not possible have_selector.

what :

all('body:first-child').first.id.should == '#foobar' 

however, capybara dsl, defined (more or less):

def all(*args)   page.all(*args) end 

and page empty unless use visit it's integrations specs.

how can use capybara all method inside rspec controller test ?

i can't test right after googling seems trick

def page   capybara::node::simple.new(response.body) end 

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