Francois Reynoud

Selenium Grid

Less Selenium, more unit testing

(With Jasmine)Dima Kovalenko

@dimacus

What do you use for “in browser” testing?

Selenium has some issues

Selenium Issues

• Reliability / Stability

Stability

Selenium Stability Last 2 months

Selenium Stability Last 12 months

Selenium Issues

• Reliability / Stability• Speed

Build Time – 400 Selenium on 3 machines 6 parallel cores

Typical Selenium Flow

Typical Selenium Flow

Typical Selenium Flow

Typical Selenium Flow

Source: GIS

Why so slow?

• Browser speed• JS speed• Machine speed• External URLs

Selenium Issues

• Reliability / Stability• Speed• Internet Explorer / Browser Compatibility

Internet Explorer

Source: GIS

Don’t use Selenium to test JavaScript!

Use it to test application flow instead.

http://pivotal.github.com/jasmine/

Jasmine

• Reliability / Stability

Jasmine

• Reliability / Stability• Browser Compatibility

Jasmine

• Reliability / Stability• Browser Compatibility • Speed

Build Time (3,500+ tests)

Jasmine is a BDD tool

(Behavior Driven Development)

What is BDD

In software engineering, behavior-driven development (abbreviated BDD) is a software development process based on test-driven development (TDD).[1][2] Behavior-driven development combines the general techniques and principles of TDD with ideas from domain-driven design and object-oriented analysis and design to provide software developers and business analysts with shared tools

and a shared process to collaborate on software development.

Source: Wikipedia

BDD In the Nutshell

Write tests that describe application flow.

What BDD looks like

“Purchase flow should accept VISA”

Jasmine Test Sample

It’s Just Functions!

• “describe” “context” “it”…• Can use any JS code to make a test work

Jasmine Features

• Mocks / Spies• Fixtures• Matchers• Setup / Teardown• Asynchronous Support and Callbacks

Mocks / Spies

• Double any function• Monitors the calls the function• Monitors the arguments passed in• Can create a “bare” spy• Mock the Clock

Fixtures

• Adding elements to page on the fly

Matchers

• expect()• toEqual()• not()• toBeFalsy()• toThrow()• Custom matchers

Setup / Teardown

• beforeEach()• afterEach()

Asynch support

• Using spies to verify Callbacks• runs()• waitsFor()

What it is written in

• HTML• JavaScript• Ruby– Rake– ERB– Rspec

Workflow in Ruby

• Rake• ERB (Generate HTML)• Selenium• Tests in Loaded JS• Rspec

Environments supported

• Ruby• Rails• Spider Monkey• Node• Scala• Java• Django• .Net• Perl• HTML

Installation

• gem install jasmine• jasmine init

Questions?