尽管使用了 JavaScript 警报 window，但销毁方法测试并未失败

Question

我有一个 Rails 应用程序，正在使用 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 link：

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

我运行测试，测试通过。它不应该通过，因为在调用操作之前我有警报 window。

我安装了

brew cask install chromedriver

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，我会改进测试：

accept_confirm do
    click_link 'Destroy'
end

我想我的问题是，我不知道把线放在哪里：

Capybara.default_driver = :selenium_chrome ### 不工作

我在哪里创建水豚的配置文件？在官方文档中，他们在 lib/capybara.rb

中说

我在那里试过了，我得到了错误：

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'

Answer 1

您没有显示您的 Capybara 配置 (default_driver/javascript_driver)，而且您的测试中也没有 js 元数据，这意味着您可能使用 rack_test 驱动程序运行你的测试。 rack_test 驱动不支持 JS，因此会完全忽略 JS 确认。如果你想测试 JS 行为，你需要确保你使用的是真正支持 JS 的驱动程序 - 请参阅 https://github.com/teamcapybara/capybara#drivers and https://github.com/teamcapybara/capybara#using-capybara-with-rspec

尽管使用了 JavaScript 警报 window，但销毁方法测试并未失败

Destroy method test doesn't fail, although JavaScript alert window is used

rspec

ruby-on-rails

capybara