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Automated Web Testing With Selenium


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Automated Web Testing with Selenium. A presentation to Sydney Business Technology User Group (SBTUG) on 30 September 2009

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Automated Web Testing With Selenium

  1. 1. Automated Web Testing with Selenium<br />By Jodie Miners<br />Presented to SBTUG<br />30 September 2009 <br />
  2. 2. What is Selenium?<br />It’s Free and Open Source<br />It originally came from Thoughtworks<br />It comes in 3 flavours<br />IDE (Integrated Development Environment) – for recording test cases in Firefox<br />RC (Remote Control) – for running automated tests on any browser<br />Grid – for large scale test runs of multiple tests in parallel <br />You can get it here<br />“Selenium tests run directly in a browser, just as real users do”<br />
  3. 3. Why use Selenium<br />You are always doing the same steps over and over again<br />You need to get to the last step in a wizard to test that step<br />You want to pre-fill some dummy data<br />Formal Functional and Regression Testing<br />Load Testing *<br />
  4. 4. Selenium IDE<br />A Firefox add-on that allows you to record tests for playing back in any browser.<br />Very simple to use<br />Allows non developers to get up and running with automated testing very quickly<br />Then they can pass on to developers for refinement or inclusion into a continuous build system<br />Can extend it easily with a little bit of HTML knowledge<br />
  5. 5. Recording and Playback<br />First Decide what you are testing and work out your test case(s)<br />IDE Demo<br />Record a test<br />Play back a test<br />Debug a test<br />Step through a test<br />Capture screen shot<br />Asserts<br />
  6. 6. Selenese<br />The language of selenium. It is quite easy to learn<br />3 parts to it<br />Command – eg Type<br />Locator – eg Input Box<br />Value – eg “ABC”<br />Can easily be written in HTML<br />Things to help build the IDE tests<br />Assert / Wait for Page to Load / Verify Text Present / Verify element present on each page<br />Slow things down with pauses and timeouts<br />Step through firs then run, add pauses and wait’s if it fails because it’s going too fast<br />Add think times<br />
  7. 7. Selenese Locators<br />Can Locate page elements by the following 4 methods<br />ID, DOM, Xpath, CSS<br />IDE recorderwill choose the best one to use, or you can choose which ever method if you are coding the tests. <br />Can also use Wildcards and Regular Expressions <br />See for more info - it’s very comprehensive<br />Install Firebug to help with working out the locators<br />
  8. 8. Selenium RC<br />Takes a little time and effort to get it up and running<br />Can then run your tests scripts from IDE in different browsers<br />With good results reporting<br />Or write the tests in code and automate the testing even further<br />Issues<br />Need to Install and use Java<br />Very command line / batch file based<br />Selenium RC Demo<br />
  9. 9. Demo<br />Run the test in Firefox<br />Run the test in IE<br />Run the test in Chrome<br />Note that they are all in sequence<br />
  10. 10. Coding your tests<br />Coding of Selenium testing can be done in<br />Java, Ruby, Groovy, C#, Perl, PHP, Python<br />Most examples are Java or Ruby, not that many people using C#<br />Add If statements<br />Eg if stock exists then add to cart (rather than having an error message)<br />Add looping statements<br />For each product found, add to cart<br />Easier to add parameterisation or data driven tests<br />eg have a list of products in a file or table – add each of the products to the cart<br />(you can do data driven tests in IDE – see here )<br />Multiple test runs<br />Run the test 4 times, each time logged in as a different user<br />Selenium Code Demo with NUnit<br />
  11. 11. Demo<br />Show the code<br />Paste the selenese in<br />Show NunitvsMSTest?<br />Run the Nunit test<br />Have one prepared ready to go<br />
  12. 12. Reporting<br />There is a great reporting framework if you code in Java or use TestNG<br />Logging Selenium<br />For C# these are the options: <br />Just capture the Selenium output to a file<br />Code a reporting framework yourself<br />Use the Visual Studio Team System Test Edition framework<br />Use the NUnit reporting<br />I use a combination of VSTT reporting and some additional logging to a database that I created myself.<br />
  13. 13. Selenium Grid<br />Scale out the tests to run on multiple browsers at the same time<br />Saves time in doing the testing<br />But you need to rely on the reporting as you can’t watch 5+ browsers do the testing<br />Great tutorial and demo here<br />Requires Java SDK and Apache Ant to run<br />
  14. 14. My Grid Setup<br />
  15. 15. Taking the Grid Further<br />Scale out your grid to the Cloud using Amazon EC2 service<br />Or use a third party service<br />Sauce Labs<br />In early beta<br />Uses your own code <br />So can set up the code to either run locally or via web <br />Current special US$100 for 5000 minutes<br />Lots of Browser / OS combinations<br />Test Environment Picture<br />BrowserMob<br />Time consuming to set up<br />Some limitations on which selenium commands can be used<br />Lots of options (eg can test with specific bandwidth limitations)<br />Can be used as for http requests only, as well as real browser tests<br />Around US$2.00 per browser per hour<br />
  16. 16. More Advanced Topics<br />UI Element mapping – How developers can make it easier for end users to build Selenium tests using element locator names that they can understand<br /><br />Using Xpath references with the Ext-JS javascript framework <br /><br />
  17. 17. Load Testing<br />Purists say Selenium is not for load testing<br />That is mainly because of the hardware required to run multiple browsers on the same machine.<br />I hit limits of 5-8 browsers on a standard desktop machine and 12-15 browsers on a server<br />Use Browser Mob or SauceLabs to overcome these issues.<br />Also as Selenium uses Real Browsers it requires real logins to simulate real loads – so you have to log in as real users on your system<br />It does not do virtual load and virtual users<br />
  18. 18. Recording in IE (just for @aussienick)<br />Watin for .net<br /><br />Has a built in recorder for IE<br />There are also Watir (ruby), and Watij (java) variants <br /><br />Visual Studio Team System 2008 Test Edition (VSTT)<br />Visual Studio Team System 2010 Test Edition + Team Foundation Server<br />Looks Fantastic<br />Will also record and play back windows apps<br />Must use TFS<br />
  19. 19. References<br />Selenium Tutorial a good video<br />Full list of software testing tools<br />VSTT Quick Reference<br />
  20. 20. X-Path References<br />There is a great deal of help online for Xpath, here are some of the best sites I’ve found<br />Xpath reference<br />Some nice simple examples (on the Xpath tab)<br />Quick Reference Card<br />MSDN<br />Great tutorial with lots of examples<br />Selenium Wiki Xpath reference<br />