Testing Web Apps With Scripting Languages Mark Rees

Testing Web Applications with Scripting Languages

Mark Rees Century Software

twill 

Simple language for web browsing

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Stress tester



Web site tester

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http://code.google.com/p/twill

twill-sh 

Interactive shell −

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Scripted browsing −

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twill-sh twill-sh -u http://localhost:8087

Record twill scripts with scotch

twill-fork 

Scripted stress testing −

twill-fork -n 100 -p 5 test-wiki.twill

twill - unit testing 

twill-sh process directory of tests

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twill master run script

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Python unit test framework

twill – other features 

Supports authentication

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Debug helpers

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Extended with user defined commands

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Handles “bad” html

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“in-process” wsgi support

twill – the cons 

Advanced usage requires python skills

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It knows nothing about javascript

selenium 

Test web apps from within the browser

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Linux, Mac OS X, Windows −

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ie6+, firefox 0.8-3.0, mozilla 1.6+, safari, opera 8+, chrome

http://www.openqa.org/selenium

Selenium Core 

Uses javascript & iframes to embed test engine

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Core must be installed on webserver under test

Selenium IDE 

Firefox extension

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Gets round core limitations

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Saves tests as −

html or ruby ide scripts

−

Selenium RC run scripts in 

Java, C#, Perl, PHP, Python, Ruby

Selenium Remote Control 

Allows auto web ui testing with any language



2 components −

Selenium server, written in java

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Drivers for languages including python and ruby

Selenium: how it works

Other options 

Watir http://www.openqa.org/watir

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Watij http://www.openqa.org/watij

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Floyd http://www.openqa.org/floya

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HttpUnit http://httpunit.sf.net

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Sahi http://sahi.co.in/w/

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WebDriver http://code.google.com/p/webdriver

WebDriver 

One day will be part of selenium 2.0

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Drives the browser using best native method

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Java & Python bindings

Questions

code:test-rst2html.twill go http://localhost:8081/rst2html formvalue 1 text hello submit find "hello" back follow "Home"

code:test-rst2html-debug.twill debug http 1 go http://localhost:8081/rst2html formvalue 1 text hello submit find "hello" back follow "Home"