Merits of Whitebox Testing:

·         More code coverage

·         More error can be found earlier during the development process.

·         The whitebox testing could start in the early phase along with softwrae development.

·         Just a main module from developer is enough to start to test by using stubs.

·         Helps giving more stable build

Demerits of Whitebox Testing::

·         More time consuming to develop test cases as it involves development effort

·         Often new architecture need to be designed to suit your testing needs.

·         Testers need to be involved in requirements, software design document review also.