（Ruby）在黄瓜测试中不能使用硒命令吗？

Question

I am trying to save object definitions in a "home page" file and simply call those methods whenever I need to use that button/link/image/etc. But for some reason the selenium commands are bringing up a NoMethodError . When I simply run the cucumber command while on the features folder in the terminal, I get these errors:

When I click on Site Management           # features/step_definitions/steps.rb:17
  undefined method `find_element' for nil:NilClass (NoMethodError)
  ./features/lib/pages/home.rb:3:in `siteMgmt'
  ./features/step_definitions/steps.rb:18:in `/^I click on Site Management$/'
  features/test.feature:6:in `When I click on Site Management'

So in other words, it's trying to "click on site management," the code moves to the Home class, the SiteMgmt method (great!) and then fails when trying to run the selenium find_method method. I thought I might have to add a require selenium-webdriver at the top of home.rb , but a) that's NOT the case in steps.rb and, even if I add it, it doesn't work.

Here is the folder structure:

features/
    --test.feature
    lib/
        pages/
            --home.rb
    step_definitions/
        --steps.rb
    support/
        --env.rb

env.rb

require 'selenium-webdriver'

Dir[File.dirname(__FILE__) + "/../lib/pages/*.rb"].each {|file| require file }

Before do |scenario|
  @driver = Selenium::WebDriver.for :chrome
  @url = "URL goes here"
end

After do |scenario|
  @driver.quit
end

test.feature

Feature: Proof of Concept
  Stack overflow help!

  Scenario:
    Given I am logged into the site
    When I click on Site Management
    Then the Site Management page should load

steps.rb

Given(/^I am logged into AMP$/) do
  @driver.get @amp_url
end

When(/^I click on Site Management$/) do
  link = Home.new.siteMgmt
  link.click
end

Then(/^the Site Management page should load$/) do
  # assert here
end

home.rb

class Home
    def siteMgmt
        elem = @driver.find_element(:xpath, '//*[@id="body"]/section[2]/ul/li[1]/h3/a')
        return elem
    end
end

Thanks for all your help!

Answer 1

The @driver instance variable that's created in the Before block isn't available to an instantiated Home object. You could add a parameter to the site_mgmt method and pass the @driver instance variable in. Here's a contrived example:

class Home
  def site_mgmt(driver)
    elem = driver.find_element(:id, "logo")
  end
end

require 'selenium-webdriver'

@driver = Selenium::WebDriver.for :chrome
@driver.navigate.to "http://www.iana.org/domains/reserved"

link = Home.new.site_mgmt(@driver)
link.click

A couple of notes: 1) variables in ruby are snake_case'd (ie site_mgmt instead of siteMgmt ; and 2) return elem in site_mgmt isn't needed because ruby methods implicitly return.

Answer 2

Well, it turns out all I had to do is turn @driver to $driver. I'm still learning Ruby and didn't realize the difference.