Ruby Cucumber多行引号与插值?

时间:2010-12-07 14:40:24

标签: ruby-on-rails ruby cucumber gherkin

我正在使用Cucumber将JSON发送到某些API操作。在一个实例中,我需要知道在API调用之前构建的对象的ID并传入该ID。

我想这样做:

  Scenario: Creating a print from an existing document
    Given I am logged in as "foo@localhost.localdomain"
      And I have already built a document
     When I POST /api/prints with data:
       """
       {
         "documentId":"#{@document.id}",
         "foo":"bar",
         "etc":"etc" 
       }
       """
     Then check things

哪个不起作用,因为"""字符串不会像双引号字符串那样插入变量。 I have already built a document步骤会构建@document对象,所以我不知道我的ID会是什么。如果重要的是,我将MongoDB与mongoid一起使用,我手动设置ID的努力已证明毫无结果。

有没有一种干净的方法来实现这个目标?

环境:

ruby: 1.8.7
rails: 3.0.1
cucumber: 0.9.4
cucumber-rails: 0.3.2

3 个答案:

答案 0 :(得分:3)

更改为ERB语法(<%= ... %>),然后在步骤定义中,通过ERB运行字符串:

require 'erb'

When %r{^I POST (.+) with data:$} do |path, data_str|
  data = ERB.new(data_str).result(binding)
  # ...
end

答案 1 :(得分:2)

ERB是推迟评估的一种方式,但也许,西奥,这有点清洁?

这方面的两半是情景方面:

Scenario: Creating a print from an existing document
  Given I am logged in as "foo@localhost.localdomain"
    And I have already built a document
  When I POST /api/prints with data:
   # outer, single quotes defer evaluation of #{@document}
   '{
     "documentId":"#{@document.id}",
     "foo":"bar",
     "etc":"etc" 
   }'
 Then check things

步骤定义方:

When %r{^I POST (.+) with data:$} do |path, data_str|
  # assuming @document is in scope...
  data = eval(data_str)
  # ...
end

答案 2 :(得分:1)

我建议使用类似

之类的场景大纲和示例
Scenario Outline: Posting stuff
....
When I POST /api/prints with data:
   """
   {
     "documentId": <document_id>,
     "foo":"bar",
     "etc":"etc" 
   }
   """
Then check things

Examples: Valid document
| document_id |
| 1234566     |

Examples: Invalid document
| document_id |
| 6666666     |

在示例中。这将清楚地表明价值来自哪里。在此处检查方案大纲中的替换http://cukes.info/step-definitions.html