White box testing called as glass box testing because in 
this type of testing,  we do not have knowledge about the 
internal logic and programming code of the application.

Hi vibhathakur,

i think what u said is wrong when i compared with the text 
book called software testing by srinivasan desikan.

In that book it is clearly mentioned that for white box 
testing u need to have some program logic as well as coding 
knowledge.just check out and give me the correct answer. r 
mail to my id sreenivasu146@gmail.com

thanks...

White Box Testing is also called as glass box testing 
because in this type of testing Tester has the excellent 
knowledge about the programming logic and how the 
programming component interact.

Hi vibha,

I did nt get you. can u explain me in detail so that i can 
understand and clear my doubt. My question is Why white box 
testing techniques are also called as clearbox testing and 
glass box testing techniques?

Pls dont go through above answers all are wrong...white box 
testing done by tester who has progarmming knowlege n logic 
of  software..if developer has done any thing wrong in 
their work then whitebox tester can have clear  idea about 
defects and they can rectify them by their 
techniques...thus y  they r called clear or glass box 
testing

White box testing is known as glass box ,structural,clear 
box and open box testing is a s/w testing technique in 
which explicit knowledge of the internal workings of the 
item being tested are used to select the test data.

I am the author of "Software testing - Principles and 
practices". Thanks for referring my book in the discussion 
and here is my answer from best of my knowledge. 

While box testing, clear box testing and glass box testing 
are one and the same. Doing this type of testing requires 
the source code, clear understanding of program logic and 
skills in programming. 

Black box testing focusses on set of inputs and their 
corresponding expected output and source code is not 
necessary here.

A combination of black box and white box techniques in 
doing the testing (code coverage testing at times follows 
this technique) is called grey box testing. 

These are explained in my book and all the best!.

Hi, According to my knowledge...

White Box testing also called Glass box or Clear Box or 
Open box testing also. In this testing is conduct on coding 
level . In this testing,  tester have knowledge about 
internal structure of the program.