Selenium in real-world projects: Automated testing for web applications

Selenium in real world projects Automated testing of web applications Martin Kleppmann Ept Computing | www.eptcomputing.com

Deploying a new release http://ﬂickr.com/photos/josa/124264708/ (creative commons)

http://ﬂickr.com/photos/dennissylvesterhurd/200001422/ (creative commons)

Selenium

Model-View-Controller Controller Unit testing Request Client Model DB Response View

Build cycle Checkout latest version Run unit/model tests Migrate staging database 10 mins Deploy to staging server Fill database with example data Render lots of views: wget -r Run Selenium scripts Notify us of outcome

Model-View-Controller Selenium testing Controller Unit testing Request Client Model DB Response View wget -r

Functional stack Rendering on screen DOM (Document tree) Selenium HTML wget -r HTTP Web framework Model test Database

Sample script # User is not logged in. Searches for auction and chooses it in the listing selenium.type quot;search_queryquot;, quot;seleniumquot; selenium.click quot;commitquot; selenium.wait_for_page_to_load quot;30000quot; selenium.click quot;link=Selenium test auction, single lot, normal+buy nowquot; selenium.wait_for_page_to_load quot;30000quot; # User places a bid of 12 pounds (below the reserve price) selenium.type quot;bid_max_price_vattedquot;, quot;12quot; selenium.click quot;bid_submitquot; selenium.wait_for_page_to_load quot;30000quot; # User logs in as Adalbert selenium.type quot;loginquot;, quot;adalbertquot; selenium.type quot;passwordquot;, quot;asdfquot; selenium.click quot;commitquot; selenium.wait_for_page_to_load quot;30000quot; # Bid confirmation page selenium.click quot;bid_submitquot; selenium.wait_for_page_to_load quot;30000quot; # Redirected to auction page - check Adalbert is losing assert selenium.is_text_present(quot;You are losing your bid on this auctionquot;) assert selenium.is_text_present(quot;below the seller's reserve pricequot;)

Selenium strong points • Simple and powerful DOM-level testing • Fairly stable – ok for continuous integration • Ajax-heavy apps (cross-browser issues) • Testing typical user ﬂows • Good ﬁt with Agile et al. • Open Source

Selenium weak points • Fiddly setup, platform maintenance • Tedious error diagnosis • Valid UI changes may break test • Rendering tests limited • Interaction with Flash • Slow; concurrency problematic • Heavily dependent on state – generate data

The future • “Selenium on demand” service – “rent a web browser”, large choice of platforms • Acceptance testing; testing impact of ads • Memory leak detection • Access to email in tests • etc...

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Selenium in real-world projects: Automated testing for web applications

by Martin Kleppmann on Sep 27, 2008

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Selenium in real-world projects: Automated testing for web applications — Presentation Transcript