什么是黄瓜 #source_tag ？

Question

我什么时候遇到黄瓜这个问题。这就是一切。

我的宝石文件

source 'https://rubygems.org'

gem 'rails', '3.2.1'

gem 'pg'

# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails',   '~> 3.2.3'
  gem 'coffee-rails', '~> 3.2.1'
  gem 'uglifier', '>= 1.0.3'
end

gem 'jquery-rails'

group :test do 
  gem 'rspec-rails'
  gem 'factory_girl_rails'
  gem 'cucumber-rails'
  gem 'database_cleaner'
  gem 'capybara'
end

功能测试

Feature: Requesting invitations
  As a visitor
  I want to request a beta invitation
  So I can be sent an invitation when the site is ready

  Scenario: Requesting an invitation
    Given I am on the homepage
    When I request and invitation for "foo@example.com"
    Then I should see "Your on the list" confirmation

错误输出

    Feature: Requesting invitations
      As a visitor
      I want to request a beta invitation
      So I can be sent an invitation when the site is ready

      Scenario: Requesting an invitation
        Given I am on the homepage
        When I request and invitation for "foo@example.com"
        Then I should see "Your on the list" confirmation

rake cucumber:ok
/Users/node/.rvm/rubies/ruby-1.9.2-p290/bin/ruby -S bundle exec cucumber  --profile default
Using the default profile...
Feature: Requesting invitations
  As a visitor
  I want to request a beta invitation
  So I can be sent an invitation when the site is ready

  Scenario: Requesting an invitation                    # features/requesting_invitations.feature:6
Deprecated: please use #source_tags instead.
    Given I am on the homepage                          # features/requesting_invitations.feature:7
      Undefined step: "I am on the homepage" (Cucumber::Undefined)
      features/requesting_invitations.feature:7:in `Given I am on the homepage'
    When I request and invitation for "foo@example.com" # features/requesting_invitations.feature:8
      Undefined step: "I request and invitation for "foo@example.com"" (Cucumber::Undefined)
      features/requesting_invitations.feature:8:in `When I request and invitation for "foo@example.com"'
    Then I should see "Your on the list" confirmation   # features/requesting_invitations.feature:9
      Undefined step: "I should see "Your on the list" confirmation" (Cucumber::Undefined)
      features/requesting_invitations.feature:9:in `Then I should see "Your on the list" confirmation'

1 scenario (1 undefined)
3 steps (3 undefined)
0m0.967s

You can implement step definitions for undefined steps with these snippets:

Given /^I am on the homepage$/ do
  pending # express the regexp above with the code you wish you had
end

When /^I request and invitation for "([^"]*)"$/ do |arg1|
  pending # express the regexp above with the code you wish you had
end

Then /^I should see "([^"]*)" confirmation$/ do |arg1|
  pending # express the regexp above with the code you wish you had
end

rake aborted!
Command failed with status (1): [/Users/node/.rvm/rubies/ruby-1.9.2-p290/bi...]

Tasks: TOP => cucumber:ok
(See full trace by running task with --trace)

所以你可以看到，当我运行这个 rake 任务时，它会因某种原因而中断。当我运行“rake cucumber”时，我得到了同样的结果，我不知道#source_tag 是什么，也找不到关于它的文档。我该如何解决这个问题并消除错误？我认为这是一个非常直接的场景。宝石清单给出：

cucumber (1.1.8)
cucumber-rails (1.3.0)

谢谢。欢迎任何帮助。

Answer 1

#source_tag 警告实际上是针对水豚开发者的。 Capybara 是 cucumber-rails 的依赖项。

（提示，现在是精简 Gemfile 的好时机……每一点都有帮助。）

如cucumber github issues中所见

确实，弃用警告是为了向 Capybara 开发人员显示的，因此作为 Cucumber 用户的您没有意义看到它。我想我们应该完全删除弃用警告，除非有人能想出一个聪明的机制，只在 Capybara 开发人员运行测试时才显示它。 @aslakhellesoy @joliss @jnicklas WDYT？

...

Cucumber 1.1.9 已发布，删除警告。

tl;dr 升级到 cucumber >= 1.1.9，#source_tag 干扰就会消失。

Answer 2

我不确定“source_tags”消息的含义，但它是警告而不是错误。真正的问题似乎是 Cucumber 没有找到任何步骤定义。您需要编写步骤定义，Cucumber 应该为您提供开始的代码 - 它通常在结果摘要之后立即打印“sn-ps”。