selenium ui paradigm - ddd north 2
DESCRIPTION
Slide deck from the presentation at DDD North 2TRANSCRIPT
SELENIUMUI Testing Paradigm
@NathanGloyn
nathangloyn
Design Code Release
Agenda
UI testing Why use Selenium? Selenium: Origins Selenium: IDE & Concepts Selenium: WebDriver Selenium: Advanced concepts Summary Questions
What is UI testing?
a.k.a System Testing, Functional testing
Use UI to drive the system All parts of system exercised Ensure that UI behaves as expected
Testing through the UI
Pros Ensure that system works as a whole Easy regression testing
Cons Expensive Time consuming
Why use Selenium
Free Open source Supports Java, Ruby, .Net, Python,
PHP & Perl Portable Combine with other tools
Origins
Thoughtworks Jason Huggins Javascript Java + Http Request Simon Stewart WebDriver
Origins: Projects
Selenium Core
Remote Control GridIDE
Web driverSelenium 1.0Selenium 2.0
Selenium IDE
Firefox addin Record & replay Supports plugins Creates Selenese scripts Can output unit tests in various
languages
Selenium IDE
Demo
Concepts: Assert vs Verify a.k.a hard or soft assertions Different uses Fail Assert = immediate test failure Fail verify = continue to end of test Use depends on test
Concepts: Commands
Actions Click keyDown
Accessors Title Text
Assertions Assert Verify
Concepts: Locators
id Name Tag Name Class Name CSS Link Partial link
Xpath
Attribute based
Structure based
Content based
Concepts using Selenium IDE
Demo
Selenium IDE: Summary
Easy way to get started Able to create suites of tests Very good for quick smoke tests e.g
navigation Test can be exported to different
languages Limited to FireFox Very data sensitive Not usable from a CI server
Web Driver
Has native browser specific drivers No server needed Object Oriented API HtmlUnit support Support for Selenium RC
WebDriver
Demo
Brittle tests
Data dependent Framework & test code combined Incorrect locators
Data
Deterministic vs Non-Deterministic
Static vs Dynamic Easier vs Hard
Brittle tests
Bad Code
Page Object Pattern
Popular design pattern in testing Abstracts a page Encapsulates all operations Helps prevent brittle tests Page Object does not assert or verify
Page Object Pattern
Demo
Domain Specific Language
Abstraction Specification Not a “proper” DSL Readable Build it piece at a time Investment
Domain Specific Language
Demo
Summary
Tests the application end to end Very easy to get going with Strategies to avoid brittle tests Free Investment in tests
Questions?