Presented By: Brent Strange

Browser Compatibility Testing Risk Analysis

Learn the art of trimming browsers from a browser compatibility test list by knowing your users, understanding how the browser works, OS & browser facts versus misconceptions, and grouping browsers by common component versions to remove redundancy.

Agenda

• Browser History• Who are your users?• Understand The Browser• Understand how browsers differ• Using the Browser Cheat Sheet• Your turn… A Challenge• Browser fact vs. fiction• So what is a browser compatibility defect?• Manage Risk• Questions

The History

Browser Statistics

43%

32%

16%4%

3%1% 1%

Browser Version Market Share (01/2008)

Internet Explorer 7.0Internet Explorer 6.0Firefox 2.0Safari 3.0OtherSafari 41Opera 9.x

Source: marketshare.com

The Task At Hand

..b.. b.. but that’s over 20 released versions…

I want you to test our site with FireFox 1.0 – 2.0 by the end of day!

How Do You Tackle Testing This?

The Browser Dissected

Layout Engine

JavaScript Engin

e

Plugins

Shell Featu

res

Component: Layout Engine

Layout Engine

Component: Shell Features

Shell Features

Component: JavaScript Engine

JavaScript Engine

Component: Plugins

Plugins

Component Differences

Internet Explorer•Layout Engine: Trident•JavaScript Engine: JScript

FireFox•Layout Engine: Gecko•JavaScript Engine: SpiderMonkey

Netscape•Layout Engine: Gecko•JavaScript Engine: SpiderMonkey

Opera•Layout Engine: Presto•JavaScript Engine: linear_b, futhark

Safari•Layout Engine: KHTML•JavaScript Engine: WebKit (Webcore & JavaScriptCore)

The Browser Cheat Sheet

Removing Browser Redundancy

FireFox 2.0.0

FireFox2.0.0.5

FireFox 2.0.0.11

FireFox2.0.0.11

Removing OS Redundancy

IE 6Ser 2003

IE 6 WinXP

IE 6Win2000

IE 6 WinXP

Determine the Test Matrix

Back to: The Task At Hand

End of day?! Hah...I’ll have it done in 2 hours.

I want you to test our site with FireFox 1.0 – 2.0 by the end of day!

Challenge: One small change?

I only changed 1 line of JavaScript code

Response.Write( Math.Round(3.1415) );to

Response.Write( Math.PI );

Determine the Test Matrix

Browser Fact vs. Fiction

Find Browser Compatibility Defects

So…what is a browser compatibility defect?

Manage Risk

• Set Expectationso Define Browser Assumptionso Define OS Assumptions

• Define the browser list to be tested• Defend your strategy with facts

Questions

About

Download this presentation and handouts at:

http://QAInsight.net