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[英]typeahead.js test failing on Rails 4 with Cucumber and Capybara-Webkit
[英]Test database seeding with Minitest-rails, Capybara, Capybara-webkit and Rails 4
我对TDD非常陌生,因此选择了上述Gems。 我认为我已经正确设置了它,因为我可以运行测试。 但是,我无法弄清楚如何从db / seeds.rb中填充测试数据库。 当我调用
rake db:seed RAILS_ENV=test
在终端中,我可以看到通过PGAdmin在数据库中创建的行。 但是,当我使用以下命令运行测试时
rake minitest:all
之后数据库最终变成空白,并且在测试中,当我保存屏幕截图时,数据库中的项不会像我在开发中时那样出现在前端。
我的test_helper.rb包含以下内容。
ENV["RAILS_ENV"] = "test"
require File.expand_path("../../config/environment", __FILE__)
require "rails/test_help"
require "minitest/rails"
require 'minitest/rails/capybara'
require 'minitest/focus'
require 'minitest/colorize'
Capybara.javascript_driver = :webkit
class ActiveSupport::TestCase
fixtures :all
DatabaseCleaner.strategy = :transaction
class MiniTest::Spec
before :each do
Rake::Task["db:seed"].invoke
DatabaseCleaner.start
end
after :each do
DatabaseCleaner.clean
end
end
end
还有一些额外的背景信息,即我的db / seeds.rb文件(当使用rake手动播种时有效)
ProgramIndustry.delete_all
ProgramIndustry.create([
{ name: 'Accounting and finance'},
{ name: 'Banking'},
{ name: 'Construction'},
{ name: 'Education'}
])
在测试开始时,为什么数据库不填充seeds.rb?
您的数据库为空,因为您使用的是DatabaseCleaner,它将从数据库中删除数据。 我假设这是您希望test_helper.rb文件看起来像的样子:
ENV["RAILS_ENV"] = "test"
require File.expand_path("../../config/environment", __FILE__)
require "rails/test_help"
require "minitest/rails"
require 'minitest/rails/capybara'
require 'minitest/focus'
require 'minitest/colorize'
Capybara.javascript_driver = :webkit
class ActiveSupport::TestCase
fixtures :all
DatabaseCleaner.strategy = :transaction
before do
DatabaseCleaner.start
Rake::Task["db:seed"].invoke # seed after starting
end
after do
DatabaseCleaner.clean
end
end
我不知道从before钩子调用db:seed任务,这似乎有点怀疑。 但是我不使用DatabaseCleaner,因为我更喜欢使用Fixture和ActiveSupport :: TestCase支持的事务。
我不知道为什么要使用DatabaseCleaner,但是看到您在Minitest中使用RSpec语法时,我假设您只是在尝试一些事情,直到它们起作用为止。 可能我建议删除DatabaseCleaner并将所有测试数据放入固定装置中,并使用以下内容来管理跨线程的数据库事务:
ENV["RAILS_ENV"] = "test"
require File.expand_path("../../config/environment", __FILE__)
require "rails/test_help"
require "minitest/rails"
require 'minitest/rails/capybara'
require 'minitest/focus'
require 'minitest/colorize'
class ActiveSupport::TestCase
fixtures :all
end
# Capybara driver
Capybara.javascript_driver = :webkit
# Make all database transactions use the same thread
ActiveRecord::ConnectionAdapters::ConnectionPool.class_eval do
def current_connection_id
Thread.main.object_id
end
end
如果对此有疑问,请考虑以下变化:
ENV["RAILS_ENV"] = "test"
require File.expand_path("../../config/environment", __FILE__)
require "rails/test_help"
require "minitest/rails"
require 'minitest/rails/capybara'
require 'minitest/focus'
require 'minitest/colorize'
class ActiveSupport::TestCase
fixtures :all
end
# Capybara driver
Capybara.javascript_driver = :webkit
# Make all database transactions use the same thread
class ActiveRecord::Base
mattr_accessor :shared_connection
@@shared_connection = nil
def self.connection
@@shared_connection || retrieve_connection
end
end
ActiveRecord::Base.shared_connection = ActiveRecord::Base.connection
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