Ruby on rails 破坏方法试验不'；t失败，尽管使用了JavaScript警报窗口

我有一个Rails应用程序，使用RSpec和Capybara进行测试

我有以下测试：

context 'destroy user' do
    scenario "should be successful" do
      user = User.create(first_name: 'John', last_name: 'Doe', email: 'john.doe@example.com')
      visit users_path

      click_link 'Destroy'
      # expect { click_link 'Destroy' }.to change(User, :count).by(-1)

      expect(page).to have_content 'User was successfully destroyed'
    end
  end

我在浏览器中有以下链接：

<%= link_to "Destroy", user_path(user), method: :delete, data: { confirm: "Are you sure?" } %>

因为我想测试JS，但不幸的是测试并没有失败

rails_helper.rb

# This file is copied to spec/ when you run 'rails generate rspec:install'
require 'spec_helper'
ENV['RAILS_ENV'] ||= 'test'
require File.expand_path('../../config/environment', __FILE__)
# Prevent database truncation if the environment is production
abort("The Rails environment is running in production mode!") if Rails.env.production?

# Add additional requires below this line. Rails is not loaded until this point!
require 'rspec/rails'
require 'capybara/rails'

# Capybara.default_driver = :selenium_chrome ### not working

# require "support/factory_bot"
Dir[Rails.root.join('spec/support/**/*.rb')].each { |f| require f }

begin
  ActiveRecord::Migration.maintain_test_schema!
rescue ActiveRecord::PendingMigrationError => e
  puts e.to_s.strip
  exit 1
end
RSpec.configure do |config|
  # Remove this line if you're not using ActiveRecord or ActiveRecord fixtures
  config.fixture_path = "#{::Rails.root}/spec/fixtures"

  config.use_transactional_fixtures = true

  config.infer_spec_type_from_file_location!

  # Filter lines from Rails gems in backtraces.
  config.filter_rails_from_backtrace!
end

一旦测试失败，我将通过以下方法改进测试：

accept_confirm do
    click_link 'Destroy'
end

我想我的问题是，我不知道该把线放在哪里：

Capybara.default_driver=：selenium_chrome####不工作

我在哪里为水豚的配置创建文件？在官方文件中，他们在lib/capybara.rb中说

我在那里试过了，我得到了一个错误：

An error occurred while loading ./spec/models/user_spec.rb.
Failure/Error: require File.expand_path('../../config/environment', __FILE__)

Bundler::GemRequireError:
  There was an error while trying to load the gem 'capybara'.
  Gem Load Error is: uninitialized constant Capybara
  Backtrace for gem load error is:
  /Users/albert/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/active_support.rb:74:in `block in load_missing_constant'
  /Users/albert/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/active_support.rb:8:in `without_bootsnap_cache'

---

您没有显示您的Capybara配置（

default\u driver

/

javascript\u driver

），测试中也没有

js

元数据，这意味着您可能正在使用机架测试驱动程序运行测试。

rack_test

驱动程序不支持JS，因此将完全忽略JS确认。如果您想测试JS行为，您需要确保您使用的驱动程序实际上支持JS-请参阅和

我不确定“官方文档”告诉您如何在

lib/Capybara.rb

中配置Capybara，但它应该配置在一个仅在测试运行期间加载的文件中。通常，这与RSpec的配置位置相同（使用RSpec时），因此rails_helper.rb或spec_helpers.rb取决于您的具体设置。您还应该在spec_helper.rb中要求使用capybara/rspec，如capybara文档中所述-

An error occurred while loading ./spec/models/user_spec.rb.
Failure/Error: require File.expand_path('../../config/environment', __FILE__)

Bundler::GemRequireError:
  There was an error while trying to load the gem 'capybara'.
  Gem Load Error is: uninitialized constant Capybara
  Backtrace for gem load error is:
  /Users/albert/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/active_support.rb:74:in `block in load_missing_constant'
  /Users/albert/.rbenv/versions/2.4.4/lib/ruby/gems/2.4.0/gems/bootsnap-1.3.2/lib/bootsnap/load_path_cache/core_ext/active_support.rb:8:in `without_bootsnap_cache'