How do you get rspec to output what it encountered rather than it “didn't find what it expected”?

问题

I have been struggling to using ruby/rspec/capybara/devise to test my code. A simple test I am trying to write is for signing in. I have a valid user sign in and expect to see an h1 tag as defined in the following code:

describe "Authentication" do

  subject { page }
  describe "with valid information" do
    let(:user) { FactoryGirl.create(:user) }
    before { sign_in_with user.email }

    it { should have_css('h1', text: "Welcome to the Test") }
  end
end

Problem is that I get this in return:

1) Authentication signin page with valid information 
 Failure/Error: it { should have_css('h1', text: "Welcome to the Test") }
   expected css "h1" with text "Welcome to the Test" to return something
 # ./spec/requests/authentication_pages_spec.rb:34:in `block (4 levels) in <top (required)>'

Is there a way to output what the test found in the h1 (or that it didn't find it at all?) instead of it didn't find what it expected? There is a good chance my sign_in method is not working, but I can't validate that because I'm not sure what the test sees after sign_in_with executes.

Thanks and happy to provide more context if it's helpful.

EDIT Updated code to reflect subject of tests.

回答1:

... I'm not sure what the test sees after sign_in_with executes.

You can open a snapshot of the current page with save_and_open_page:

describe "with valid information" do
  let(:user) { FactoryGirl.create(:user) }
  before { sign_in_with user.email }

  it { save_and_open_page; should have_css('h1', text: "Welcome to the Test") }
end

回答2:

There is no subject, you can't use it to represent result. For Capybrara, you need to check the page object returned.

Let's rewrite the test like this:

describe "with valid information" do
  let(:user) { FactoryGirl.create(:user) }
  before do
    sign_in_with user.email
  end
  it "signs in successfully" do
    expect(page).to have_css('h1', text: "Welcome to the Test")
  end        
end

Or better, with Capybara story DSL

feature "User sign in" do

  given(:user) { FactoryGirl.create(:user) }

  scenario "with valid information " do
    sign_in_with user.email
    expect(page).to have_css('h1', text: "Welcome to the Test")
  end        

  scenario "with invalid filing" do
    sign_in_with "foo@bar.com"
    expect(page).to have_text("Invalid email or password")
  end
end

来源：https://stackoverflow.com/questions/15873016/how-do-you-get-rspec-to-output-what-it-encountered-rather-than-it-didnt-find-w

标签

ruby-on-rails-3

rspec

devise

capybara