we can test following things in white box tech technique
a)Code
b)Memory leaks
c)Resource leaks
d)Syncronisation  time

Hi Karthi,

White box testing strategy deals with the internal logic 
and structure of the code.

Types of testing under White/Glass Box Testing Strategy: 

Unit Testing: 
The developer carries out unit testing in order to check if 
the particular module or unit of code is working fine. The 
Unit Testing comes at the very basic level as it is carried 
out as and when the unit of the code is developed or a 
particular functionality is built. 

Static and dynamic Analysis: 
Static analysis involves going through the code in order to 
find out any possible defect in the code. Dynamic analysis 
involves executing the code and analyzing the output. 

Statement Coverage: 
In this type of testing the code is executed in such a 
manner that every statement of the application is executed 
at least once. It helps in assuring that all the statements 
execute without any side effect. 

Branch Coverage: 
No software application can be written in a continuous mode 
of coding, at some point we need to branch out the code in 
order to perform a particular functionality. Branch 
coverage testing helps in validating of all the branches in 
the code and making sure that no branching leads to 
abnormal behavior of the application. 

Security Testing: 
Security Testing is carried out in order to find out how 
well the system can protect itself from unauthorized 
access, hacking – cracking, any code damage etc. which 
deals with the code of application. This type of testing 
needs sophisticated testing techniques. 

Mutation Testing: 
A kind of testing in which, the application is tested for 
the code that was modified after fixing a particular 
bug/defect. It also helps in finding out which code and 
which strategy of coding can help in developing the 
functionality effectively. 

Please correct me if i am wrong.
Pooja