The best difference of Black box and white box testing

The Black box testing means-Black-box testing is a method of software testing that examines the functionality of an application without peering into its internal structures or workings.

Testing software functionality is called Black box testing

  • This method of test can be applied virtually to every level of software testing: unit, integration, system and acceptance.
  • It typically comprises most if not all higher level testing, but can also embody unit testing.


White Box testing-White-box testing (also known as clear box testing, glass box testing, transparent box testing, and structural testing)

A method of testing software that tests internal structures or workings of an application, as opposed to its functionality (i.e. black-box testing).

In white-box testing an internal perspective of the system, as well as programming skills, are used to design test cases.

The tester chooses inputs to exercise paths through the code and determine the appropriate outputs.

This is analogous to testing nodes in a circuit, e.g. in-circuit testing (ICT). White-box testing can be applied at the unit, integration and system levels of the software testing process. Although traditional testers tended to think of white-box testing as being done at the unit level, it is used for integration and system testing more frequently today.

It can test paths within a unit, paths between units during integration, and between subsystems during a system–level test.

Though this method of test design can uncover many errors or problems, it has the potential to miss unimplemented parts of the specification or missing requirements.

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Author: Srini

Experienced software developer. Skills in Development, Coding, Testing and Debugging. Good Data analytic skills (Data Warehousing and BI). Also skills in Mainframe.