A Little Something About ‘BLACK-BOX’ Software Testing

                    

Widely popular Black Box testing is the software testing method is used to test the software without knowing the internal structure of code or program. The main purpose of the Black Box is to check whether the software is working as per expected in requirement document and whether it is meeting the user expectations or not.

                   The Main focus in black box testing is on functionality of the system as whole. The term ‘behavioral testing’ is also used for black box testing and white box testing is also sometimes called structural testing behavioral test design is slightly different from black box test design because the use of internal knowledge isn’t strictly forbidden, but it’s still discouraged.

-          Black Box testing occurs throughout the software development and testing life cycle i.e Unit, Intergration, System, Acceptance and regression testing stages.

Advantages of Black Box Testing

• ·   Tester can be non technical
• ·      Used to verify contradictions in actual system and the specifications
• ·      Test cases can be designed as soon as the functional specifications are complete

Disadvantages of Black Box Testing

• ·         Test inputs needs to be from large sample space.
• ·         It  is difficult to identify all possible inputs in limited testing time. So writing test cases is slow and difficult
• ·         Chances of having unidentified paths during this testing

Methods of Black Box Testing

1. -          Graph Based Testing Methods
2. -          Error Guessing
3. -          Boundary Value Analysis
4. -          Equivalence Partitioning
5. -          Comparison Testing

Source : http://www.softwaretestingclass.com/what-is-black-box-testing/

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