Automated browser testing with Selenium and C#
Darren Bruning@dbruning
Going to cover:• Why browser automation?• Why selenium?• “Naked” selenium• Selenium in a test framework: Kumara• Kumara internals• More Selenium goodness
Why browser automation?
• Primarily for testing• Maybe also to script boring repetitive tasks
What is selenium?• There are lots of browsers• They all do similar things (go to websites, let you click on things)• There was no consistent API to automate them• Selenium 1: was javascripty, problematic• WebDriver project started at Google• Selenium 2 adopted WebDriver as preferred method to “drive”
browsers.
WebDriver protocol• Uses HTTP as a transport• “Bindings” for different languages, emit HTTP calls• WebDriver “drivers” (servers) accept HTTP calls & actually drive the
browser
What does Selenium API look like?
Why not write tests directly against Selenium API?• Tests end up with lots of code• “business logic” gets obscured• Tests only readable by devs• Would be more value in the tests if they also served as
documentation• => BDD (Behaviour Driven Design)
SpecFlow – feature files
SpecFlow – behind the curtain
SpecFlow is great and all but…• Yaaaay • test readability! • Feature documentation!
• Boo• Need plugin for Visual Studio• Can’t use refactoring tools• Becomes a pain to keep the feature file text in sync with the regex
Enter the Kumara!• Nee Calcot• Given – when –then syntax• Given(List<ICondition>)• When(List<Action>)• Then(List<ICondition>)• It’s still just code, but it’s
very readable (maybe even by a BA? Or tester?)
ICondition
Wait, how can a condition satisfy itself???
ActionBasedCondition implements ICondition
Example of an ActionBasedCondition
… and another one with preconditions
So basically, with Kumara:• You define some “Root Nouns”
(the things you interact with in a test)
• You create some IConditions on those root nouns
• You write tests using those conditions
How does Kumara use WebDriver?
Commonly, by CSS:
Then your tests can be all like…
The awesomest thing about Selenium is…
Review past tests, watch videos:• https://saucelabs.com/tests/69f48decbb234e3b8adadf2a3205eebe
Run in any combination of OS and browser
Also awesome: PhantomJS
• Very fast!• Runs locally, so less network latency for WebDriver calls,
bloating out the test runtime
Build it into your CI flow, for early feedback
Questions?