将 Capybara 与 Rails TestCase 一起使用时的机架测试错误答案

【问题标题】：Rack test error while using Capybara with Rails TestCase将 Capybara 与 Rails TestCase 一起使用时的机架测试错误
【发布时间】：2017-05-31 19:56:25
【问题描述】：

我已将 Capybara 包含在我的集成测试中。我已经根据文档设置了我的 test_helper 文件。

ENV['RAILS_ENV'] ||= 'test'
require File.expand_path('../../config/environment', __FILE__)
require 'rails/test_help'
require 'capybara'
require 'capybara/dsl'
require 'vcr'

class ActiveSupport::TestCase
  include Devise::Test::IntegrationHelpers
  # Setup all fixtures in test/fixtures/*.yml for all tests in alphabetical order.
  fixtures :all

  # Add more helper methods to be used by all tests here...
  VCR.configure do |c|
    c.hook_into :webmock
    c.cassette_library_dir = 'vcr_cassettes'
    c.default_cassette_options = { :record => :once }
  end
end

class ActionDispatch::IntegrationTest
  # Make the Capybara DSL available in all integration tests
  include Capybara::DSL

  # Reset sessions and driver between tests
  # Use super wherever this method is redefined in your individual test classes
  def teardown
    Capybara.reset_sessions!
    Capybara.use_default_driver
  end
end

为了使用 Capybara 测试我的集成测试，我在我的 portfolio_flow_test 文件中设置了一个方法（也需要 test_helper.rb）

test "signed in user can visit portfolio index page" do
  @user = users(:nicholas)
  sign_in @user
  visit portfolios_path
  assert_select "h1", "Portfolios"
end

我在所有测试中都收到此错误

ArgumentError: rack-test requires a rack application, but none was given

Capybara 的默认驱动程序是机架测试，所以我不清楚为什么在运行测试时它会失败。

【问题讨论】：

标签： ruby-on-rails capybara

【解决方案1】：

您不需要为您的 rails 应用程序设置 Capybara.app 的 'capybara/rails'。它记录在 Capybara README - https://github.com/teamcapybara/capybara#setup

【讨论】：