How can I test one, more or none images in a page with Cucumber?
I want to test if I have 0, 1, 2 or 开发者_Go百科3 times a pictures ('foo.png') in a certain page with Cucumber.
How should I write the custom step?
Thanks
You need to write a custom cucumber step that uses a custom rspec expectation matcher.
The sudo code would look something like this.
features/page.feature
Given I am on the images page
Then I should see 3 images
features/step_definitions/page_steps.rb
This file would use nokogiri to collect all the images with a given name and then use rspec to validate your expectation.
Then /^I should see (.+) images$/ do |num_of_images|
html = Nokogiri::HTML(response.body)
tags = html.xpath('//img[@src="/public/images/foo.png"]')
tags.length.should eql(num_of_images)
end
Here is a working Rspec example that shows how to use Nokogiri with Rspec
require 'nokogiri'
describe "ImageCount" do
it "should have 4 image" do
html = Nokogiri::HTML('<html><body><div id=""><img src="/public/images/foo.png"></div> <div id=""><img src="/public/images/foo.png"></div> <div id=""><img src="/public/images/foo.png"></div> <div id=""><img src="/public/images/foo.png"></div> </html></body>')
tags = html.xpath('//img[@src="/public/images/foo.png"]')
tags.length.should eql(4)
end
it "should have 3 image" do
html = Nokogiri::HTML('<html><body><div id=""><img src="/public/images/bar.png"></div> <div id=""><img src="/public/images/foo.png"></div> <div id=""><img src="/public/images/foo.png"></div> <div id=""><img src="/public/images/foo.png"></div> </html></body>')
tags = html.xpath('//img[@src="/public/images/foo.png"]')
tags.length.should eql(3)
end
it "should have 1 image" do
html = Nokogiri::HTML('<html><body><div id=""><img src="/public/images/bar.png"></div> <div id=""><img src="/public/images/aaa.png"></div> <div id=""><img src="/public/images/bbb.png"></div> <div id=""><img src="/public/images/foo.png"></div> </html></body>')
tags = html.xpath('//img[@src="/public/images/foo.png"]')
tags.length.should eql(1)
end
end
This is another way using capybara:
Then /^(?:|I )should see (\d+) images?$/ do |count|
all("img").length.should == count.to_i
end
加载中,请稍侯......
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