如何在Rails 3中的Cucumber / Capybara的页面上找到图片 [英] How do I find an image on a page with Cucumber / Capybara in Rails 3

问题描述

我使用Cucumber / Capybara与Rails 3，我试图验证上传后的图像的存在。我不知道如何检查图像的URL来验证它。

我有以下情况：

  
假设我在新的列表页面
当我用Amy Johnson Photography填写listing_name时
我将features / support / test_image.jpg文件附加到listing_images_attributes_0_photo 
 
然后我按创建
然后我应该看到Amy Johnson Photography
我应该看到图像test_image.jpg
  
 
 
 
除了最后一步之外的一切都通过。
 
 
 
我的步骤定义，如果它的页面上的文本工作伟大，但不是一个图像url：
 然后/ ^我应该看到图像（。+）$ / do | image | 
如果page.respond_to？ ：should 
 page.should have_content（image）
 else 
 assert page.has_content？（image）
 end 
 end 
  
 
 
 
然后我也尝试过这样的步骤定义：
 然后/ ^我应该看到图像（。+）$ / do | image | 
 html = Nokogiri :: HTML（response.body）
 tags = html.xpath（'// img [@src =/ public / images / foo.png]'）
 ＃tags.length.should eql（num_of_images）
 end 
  
 
 我会看到图片test_image.jpg＃features / step_definitions / listing_steps.rb：41 
 undefined方法`body'for nil：NilClass（NoMethodError）
 ./features/step_definitions/listing_steps.rb:42:in`/ ^我应该看到图像（。+）$ /'
 /manage_listings.feature:24:in`我应该看到图像test_image.jpg'
  
我假设你需要一个nokogiri步骤找到这个正确。或者如果有一个更好的方法，我接受建议。如何验证我刚上传的图片是否在网页上？感谢。
解决方案
 Nokogiri的解决方案应该可以正常工作。唯一的问题是Cabybara API不同于Webrat，所以代替 response.body ，你必须使用 page.body 。
 
 
 
但是这是一个更好的方法来测试与Cabybara的图像：
 然后/ ^我应该看到图像（。+）$ / do | image | 
 page.should have_xpath（// img [@ src = \/ public / images /＃{image} \]）
 end 
  
 
I am using Cucumber / Capybara with Rails 3 and am trying to validate the existence of an image after upload. I'm not sure how to check the url of the image to validate it. 

I have the following scenario:
Scenario: Create new listing
    Given I am on the new listing page
    When I fill in "listing_name" with "Amy Johnson Photography"
    And I attach the file "features/support/test_image.jpg" to "listing_images_attributes_0_photo" 

    And I press "Create"
    Then I should see "Amy Johnson Photography"
    And I should see the image "test_image.jpg"
Everything passes except the last step.

I've tried this for my step definition, which works great if it's text on the page, but doesn't for an image url:
Then /^I should see the image "(.+)"$/ do |image|
  if page.respond_to? :should
      page.should have_content(image)
    else
      assert page.has_content?(image)
    end
end
Then I've also tried something like this step definition instead:
Then /^I should see the image "(.+)"$/ do |image|
    html = Nokogiri::HTML(response.body)
    tags = html.xpath('//img[@src="/public/images/foo.png"]')
    # tags.length.should eql(num_of_images)
end
which causes the following error:
And I should see the image "test_image.jpg"                                                    # features/step_definitions/listing_steps.rb:41
      undefined method `body' for nil:NilClass (NoMethodError)
      ./features/step_definitions/listing_steps.rb:42:in `/^I should see the image "(.+)"$/'
      features/manage_listings.feature:24:in `And I should see the image "test_image.jpg"'
I'm assuming you need a nokogiri step to find this properly. Or if there's a better way, I'm open to suggestions. How can I validate that the image I just uploaded is on the page? Thanks.
解决方案
The solution with Nokogiri should work fine. The only problem is that the Cabybara API is different to Webrat, so instead of response.body, you must use page.body.

But theres an even better way to test for the image with Cabybara :
Then /^I should see the image "(.+)"$/ do |image|
    page.should have_xpath("//img[@src=\"/public/images/#{image}\"]")
end


                        
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