python - How to verify dynamic element present in Selenium WebDriver -


i'm writing scripts in python using selenium webdriver test web application.

the web application allows users ask questions, added div asked. each question div has own "upvote" , "downvote" link/image. image changes when "upvote" icon clicked, active inactive, or vice versa. know xpath upvote icon is:

"//div[@id='recent-questions-container']/div/div/div/div/div[2]/div/ul/li/a/i"

this "i" @ end of path class, , either 

<i class="fa fa-2x fa-thumbs-o-up"></i>

or 

<i class="fa fa-2x fa-thumbs-up clicked"></i>

depending on whether or not clicked. want verify correct image in place upon being clicked. how can that? ideally, i'd perform verification using assertions, la:

self.asserttrue(self.is_element_present( ... ))

here html i'm talking about

<div id="recent-questions-container">     <div question_id="randomly generated blah" class="q row recent-question animated pulse" data-score="0">         <div class="col-xs-12">         <div class="question-content">             <p>3</p>               <div class="row question-controls">                 <div class="owner-view hidden">                     ...                 <div class="student-view">                     <div class="col-lg-12 col-md-12 col-sm-12 col-xs-12 question-controls-left">                         <ul class="list-inline">                             <li>                                 <a href="#" class="student-view thumbs-up-to-active">                                     <i class="fa fa-thumbs-o-up fa-2x"></i></a>                             </li>                             <li>                                 <span class="num-votes">0</span>                             </li>                             <li class="thumbs-down-li">                                 <a href="#" class="student-view thumbs-down-to-active">                                     <i class="fa fa-thumbs-o-down fa-2x"></i></a>                             </li>                         </ul>                     </div>                  </div>              </div>             <hr>         </div>     </div>     </div> ... other questions ...              </div>             <hr>         </div>     </div>     </div>               </div>

you can use get_attribute class attribute , search if class contains clicked make sure in fact clicked

#make sure selector correct xpath = "//div[@id='recent-questions-container']/div/div/div/div/div[2]/div/ul/li/a/i" element = driver.find_element(by.xpath, xpath) attr = element.get_attribute('class') if  'clicked' in attr:     print("clicked") else:     print("was not clicked")

edit

i click element , should expecting change class active. find count should more 0

driver = self.driver #perform click here #the idea avoid nosuchelement exception # , see if element count greater 0 assert (len(driver.find_elements_by_css_selector(".student-view.thumbs-up-to-active")) > 0)

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