8 Temmuz 2015 Çarşamba

selenium quickstart tips

By using Selenium (http://www.seleniumhq.org/), you can automate browsers and it is a good practice to use the tool to do some integration testing.. There are many tutorials about this on the web, the following worked for me:
Absoft Training presents more tutorials here: http://www.absofttrainings.com/selenium-training-free-videos/ 

My usage tips :
  • Download Selenium standalone server and the java client.
  • In Eclipse create a java project and add the downloaded jars (must be 2 jars) to classpath.
  • Download Selenium IDE and install it as Firefox plugin.
  • Run the server and deploy your application to test.
  • Open Firefox, start Selenium IDE, press record button and enter your web application url.
  • Test your application, one use case at a time.
  • Close Selenium recording, save it and export test case as Java / Junit 4/ WebDriver.
  • I did not use the immediately exported files. But, i got help from them. I think preparing a utility file which enables you to switch between browser types, between development and production environments is convenient. If you have a complicated web page, it is good practice to write find methods for web elements and reuse them.
  • Then run tests as junit.
Some technical tips:
  • WebDriver interface provides many methods including findElement(), getTitle(), close(), getCurrentUrl() etc. It is good to examine its javadoc.
  • You can locate a web element by id, name or xpath.
  • To create Firefox driver, simply :
    • WebDriver driver = new FirefoxDriver();
  • To create Chrome driver, download the third party executable
    • System.setProperty("webdriver.chrome.driver", "path_to_executable");
    • WebDriver driver = new ChromeDriver();
  • To create IE driver, download the third party executable
    • System.setProperty("webdriver.ie.driver", "path_to_executable");
    • WebDriver driver = new InternetExplorerDriver();
  • To make same arrangements:
    • driver.manage().timeouts().implicitlyWait(60, TimeUnit.SECONDS);
    • driver.manage().window().maximize(); // maximizes opening browser
  • Selenium sees everything on a web page as web element.
  • findElement retrieves first one that matches
  • findElements retrieves all elements that match
  • You can locate by
    • Id
    • Name
    • LinkText (text of hyperlink)
    • PartialLinkText
    • Xpath (ultimate solution, when others don't work)
      • ByXpath("//input[@placeholder='Email']") means locate an input field whose placeholder attribute value is Email.
    • CssSelector
    • TagName
    • ClassName
  • Locating by Xpath
    • Xpath-Absolute: not recommended.
      • //html/body/tag1[index]/..
    • Xpath-Attributes: best when can't use id or name
      • //input[@id='Pass' and @placeholder='Password']
      • //input[contains(@id, 'user')] 
      • //input[starts-with(@id, 'user')] 
      • Selenium IDE and Firefox developer tools can help to get the xpath of the element.
    • Xpath-Relative: best for table cells
      • //table[@id='xtable']/tbody/tr[3]/td[2]
  • You can make Selenium to wait for the presence of some element:
    • final WebDriverWait wait = new WebDriverWait(driver, 60);
    • wait.until(ExpectedConditions.presenceOfElementLocated(By.id("the_id")));
A test case template:

// create driver for the browser you want
WebDriver driver = new FirefoxDriver();

//open homepage

//find related field, enter some value

//find command button and click

//assert results

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