水豚没有等待期望

Question

我有一个带有链接的页面，该链接打开带有简单输入字段的引导程序模式。 我很难理解为什么Capybara不等待模式打开而立即失败。

我添加了expect(page).to have_content('Did you')以便水豚将等待几秒钟，直到显示模态。 但是由于某种原因，它没有等待并引发Capybara::ExpectationNotMet: expected to find text "Did you" in ...."

如果我睡一秒钟，它将找到模态，但这还不够好，因为这样会调用在spec_helper.rb中找到的DB clean回调：

config.after(:each) do
  DatabaseCleaner.clean
end

这是规格：

RSpec.describe "follower button", type: :request do
  it "sends email #15B to owner", :js do
    using_wait_time 20 do
      FactoryGirl.create(:apartment_with_event)

      visit apartment_path(Apartment.last)
      click_on 'follow-events'
      expect(page).to have_content('Did you')
      within('#follow-events-modal') do
        fill_in 'follower-email-signup-mail', with: 'follower@example.com'
        click_button 'follower-signup-submit'
      end

      expect(page).to have_content(I18n.t("followers.create.title_success"))
      expect(Follower.all.count).to eq(1)
    end
  end
end

我还在spec_helper.rb中设置Capybara.default_max_wait_time Capybara.default_max_wait_time = 10 ，即使在本示例中它应该等待20秒。

忘记了，我使用Capybara-wekbit作为驱动程序。

我真的花了几个小时试图找出原因，而其他示例运行得很好。

更新：添加失败的完整回溯。

Failures:

  1) leeron's button sends email #15B to owner
     Failure/Error: raise ActionController::RoutingError, "No route matches [#{env['REQUEST_METHOD']}] #{env['PATH_INFO'].inspect}"

     ActionController::RoutingError:
       No route matches [GET] "/images/slider/missing.png"
     # /Users/etaiso/.rbenv/versions/2.2.3/gemsets/dorbel/gems/rollbar-1.2.13/lib/rollbar/middleware/rails/show_exceptions.rb:22:in `call_with_rollbar'
     # /Users/etaiso/.rbenv/versions/2.2.3/gemsets/dorbel/gems/railties-4.2.4/lib/rails/rack/logger.rb:38:in `call_app'
     # /Users/etaiso/.rbenv/versions/2.2.3/gemsets/dorbel/gems/railties-4.2.4/lib/rails/rack/logger.rb:20:in `block in call'
     # /Users/etaiso/.rbenv/versions/2.2.3/gemsets/dorbel/gems/railties-4.2.4/lib/rails/rack/logger.rb:20:in `call'
     # /Users/etaiso/.rbenv/versions/2.2.3/gemsets/dorbel/gems/request_store-1.2.0/lib/request_store/middleware.rb:8:in `call'
     # /Users/etaiso/.rbenv/versions/2.2.3/gemsets/dorbel/gems/rack-1.6.4/lib/rack/methodoverride.rb:22:in `call'
     # /Users/etaiso/.rbenv/versions/2.2.3/gemsets/dorbel/gems/rack-1.6.4/lib/rack/runtime.rb:18:in `call'
     # /Users/etaiso/.rbenv/versions/2.2.3/gemsets/dorbel/gems/rack-1.6.4/lib/rack/lock.rb:17:in `call'
     # /Users/etaiso/.rbenv/versions/2.2.3/gemsets/dorbel/gems/rack-1.6.4/lib/rack/sendfile.rb:113:in `call'
     # /Users/etaiso/.rbenv/versions/2.2.3/gemsets/dorbel/gems/railties-4.2.4/lib/rails/engine.rb:518:in `call'
     # /Users/etaiso/.rbenv/versions/2.2.3/gemsets/dorbel/gems/railties-4.2.4/lib/rails/application.rb:165:in `call'
     # /Users/etaiso/.rbenv/versions/2.2.3/gemsets/dorbel/gems/rack-1.6.4/lib/rack/urlmap.rb:66:in `block in call'
     # /Users/etaiso/.rbenv/versions/2.2.3/gemsets/dorbel/gems/rack-1.6.4/lib/rack/urlmap.rb:50:in `each'
     # /Users/etaiso/.rbenv/versions/2.2.3/gemsets/dorbel/gems/rack-1.6.4/lib/rack/urlmap.rb:50:in `call'
     # /Users/etaiso/.rbenv/versions/2.2.3/gemsets/dorbel/gems/capybara-2.7.1/lib/capybara/server.rb:43:in `call'
     # /Users/etaiso/.rbenv/versions/2.2.3/gemsets/dorbel/gems/rack-1.6.4/lib/rack/handler/webrick.rb:88:in `service'
     # ------------------
     # --- Caused by: ---
     # Capybara::ExpectationNotMet:
     #   expected to find text "Did you" in "...(REMOVED BY ME TO SAVE SPACE)..."
     #   /Users/etaiso/.rbenv/versions/2.2.3/gemsets/dorbel/gems/capybara-2.7.1/lib/capybara/node/matchers.rb:527:in `block in assert_text'

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1 example, 1 failure

Answer 1

从回调中我们可以看到实际的异常是来自应用程序的路由错误。 当Capybara重试/等待查找器和期望值时，它会检查服务器抛出的错误，如果Capybara.raise_server_errors为true，它将在测试线程中引发它们，以便测试可见。 从测试线程中的应用程序线程重新引发异常的副作用是，通常由Capybara处理和重试的测试线程中的任何当前异常（例如ExpectationNotMet）都由ruby设置为嵌套cause的应用程序异常。 这不是真正的原因，但我们不能因为Capybara重新引发它在那里显示的服务器错误的方式而导致。 您可以设置Capybara.raise_server_errors = false或更好，但是可以修复丢失的图像。