Software Engineering System Analysis & Designing

Black box Vs white box testing.

Difference between black box testing and white box testing.
Black Box TestingWhite box testing
Black box testing is the software testing method which is used to test the software without knowing the internal structure of code or program.white box testing is the software testing method in which internal structure is being known to tester who is going to test the software
The main aim of this testing to check on what functionally is performing by the system under test.The main aim of white box testing to check on how system is performing.
Black box testing means functional test or external testing.White box testing means structural test or interior testing
This type of testing is carried out by testers.Generally, This type of testing is carried out by software developers.
Implementation knowledge is not required to carry out black box testing.Implementation knowledge is required to carry out white box testing.
Programming knowledge in not required to carry out Black box testing.Programming knowledge in required to carry out White box testing.
Testing is applicable on higher levels of testing like system, Acceptance testing.Testing is applicable on lower level of testing like unit testing, Integration testing.
In Black box testing is primarily concentrate on the functionally of the system under test. In White box testing is primarily concentrate on the test of the program code of the system under test like code structure, branches, conditions, loops etc.
Black box testing can be started based on requirement specifications documents.White box testing is stated based on detail design documents.
The functional testing, Behavior testing , close box testing is carried out under black box testing , so there is no required of the the programming knowledge.The structure testing, logic testing, path testing , Loop testing, code coverage testing, open box testing is carried out under white box testing , so there is compulsory to know about programming knowledge.
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