Though Sahi is aimed at non-programmer testers and Selenium at programmers, we get a lot of queries on their differences. Here is a brief document which compares Selenium and Sahi.
To those who read this:
- If you are a Selenium fan, be open minded and verify the claims for yourself or contact us for clarification. And again, please be open minded. You may save a lot of time for yourself and your team.
- This document is biased towards Sahi because we built Sahi. We believe what we state is true, but if you have evidence to prove otherwise, please do contact us at firstname.lastname@example.org.
- When we say "Not sure" or "?" it means we do not have enough information because of lack of research on our part. Please verify for yourself.
- If you want a comparison between other tools and Sahi, we would be happy to discuss it.
- If you are another tool developer/supporter, please let us know how it compares and let the world benefit from alternatives.
Sahi vs. Selenium: Comparison document
|Works only on Firefox||Works on all browsers (IE, FF, Chrome, Safari, Opera)|
|Has trouble recording IFrames, Frames and popup windows||Can record on IFrames, Frames and popup windows|
|For Frames and IFrames, need to explicitly selectFrame||Implicit smart identification of elements even across Frames and IFrames|
|Uses XPath for identification of elements if id or name not present||Uses various algorithms to uniquely identify elements in a simple human recognizable way|
Programming Language support
Ease of use
|Easy to start with because of Selenium IDE which is a firefox plugin. Estimated start time less than 5 minutes||More difficult than Selenium to start because it needs installation of Sahi. Estimated start time 10-30 minutes, depending on Java installation etc.|
|Deep learning curve when the need is felt to move from Selenium IDE to Selenium RC.||There is only one mode of operation for Sahi. Extremely simple to learn and use for testers|
|Knowledge of programming language required||Can achieve most automation with just functions and variables. Sahi has inbuilt APIs for most other complex tasks like data driven testing|
|Needs JUnit style of programming||Can choose your own style|
|Needs waits for making AJAX work||No waits needed in 90% cases|
|Supports parallel execution||Inbuilt parallel execution. Needs only one parameter change|
Stability of scripts and ease of maintenance
|Smart DOM Relations resilient to UI changes||No|
Dependent on XPath
Difficult for testers to understand and debug
Does not use XPaths.
Uses _near and _in
|Implicit waits for page load and AJAX:|
1) Saves time
2) Keeps scripts simple
3) Reduces random failures
Explicit waits needed.
Dependency on other tools
|Selenium – Java (Others need something similar)||Sahi|
|Needs JUnit (and optionally eclipse) to run tests||No additional tools required. Tests run from the Sahi Controller/command line/ant|
|Non persistent reporting. Needs TestNG or something similar for that||Persistent HTML reporting which can be shared via URL or file|
Stability of product and number of releases
|Started 2004(?) in ThoughtWorks||Started 2005 in ThoughtWorks|
|Version 1 took 5 years, Version 2 planned mid-2010. Moving away from original architecture to WebDriver based architecture||Current release: Version 3 Number of stable releases in 2009: 7|
|RC: 10.5 MB, Grid 15 MB||less than 2 .5 MB with source|
|Not sure||Runtime ~ 50MB for 3 parallel threads|
|Needs external tools to create readable reports||Inbuilt HTML reports with click through to relevant portion of script|
|Build tool integration (ant, batch files)||Yes||Yes|
|Multiple OS support||Yes||Yes|
|Version Controllable Scripts/Code||Yes||Yes|
|HTTPS support/redirects||Not sure||Yes|
|401 Authentication, Windows/NTLM Authentication dialogs||Not sure||Yes|
|External proxy tunneling||Yes||Yes|
|In built APIs for data driven testing||No||Yes|
|Works only with browsers||Yes||Yes|
|Needs privileged modes on browsers for operation. (Privileged is bad)||Yes||No|
|Extensible on future browsers||Depends on finding a way to use privileged mode on that browser||Yes. Very little dependency on type of browser.|
|Free support via Forums||Yes||Yes|
|Paid support available||Yes||Yes|
|Authoritative training available||?||Yes|