How to test Web Application

Web Testing:

While testing a web application you need to consider following Cases:

• Functionality Testing  
• Performance Testing
• Usability Testing
• Server Side Interface
• Client Side Compatibility
• Security

• Buffer over flow

Functionality:

In testing the functionality of the web sites the following should be tested

1. Links

• Internal Links
• External Links
• Mail Links
• Broken Links

2. Forms

• Field validation
• Error message for wrong input
• Optional and Mandatory fields

3. Database

* Testing will be done on the database integrity.

4. Cookies

* Testing will be done on the client system side, on the temporary Internet files. 

Performance:                        

Performance testing can be applied to understand the web site’s scalability, or to benchmark the performance in the environment of third party products such as servers and middleware for potential purchase.

1. Connection Speed:

Tested over various networks like Dial Up, ISDN etc

2. Load

• What is the no. of users per time?
• Check for peak loads and how system behaves
• Large amount of data accessed by user

3. Stress

• Continuous Load
• Performance of memory, CPU, file handling etc..

Usability:

Usability testing is the process by which the human-computer interaction characteristics of a system are measured, and weaknesses are identified for correction.

• Ease of learning

• Navigation

• Subjective user satisfaction

• General appearance

Server Side Interface:

In web testing the server side interface should be tested. This is done by verify that communication is done properly. Compatibility of server with software, hardware, network and database should be tested.

Client Side Compatibility:

The client side compatibility is also tested in various platforms, using various browsers etc.

Security:
The primary reason for testing the security of a web is to identify potential vulnerabilities and subsequently repair them.

• Network Scanning

• Vulnerability Scanning

• Password Cracking

• Log Review

• Integrity Checkers

• Virus Detection

Buffer over flow:

Buffer over flow occur when fields like state allows @, ^. % etc., and when data base allows the chars and int values. And also in source code.