Nokogiri 的解决方案应该可以正常工作.唯一的问题是 Cabybara API 与 Webrat 不同，因此您必须使用 page.body 而不是 response.body.

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.

但还有一种更好的方法来使用 Cabybara 测试图像:

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