grey box testing

In recent years the term grey box testing has come into common usage. This involves having access to internal data structures and algorithms for purposes of designing the test cases, but testing at the user, or black-box level. Manipulating input data and formatting output do not qualify as "grey-box," because the input and output are clearly outside of the "black-box" that we are calling "the software under test." (This distinction is particularly important when conducting integration testing between two modules of code written by two different developers, where only the interfaces are exposed for test.) Grey box testing may also include reverse engineering to determine, for instance, boundary values or error messages.



1.Integration testing:

Integration testing' (sometimes called Integration and Testing, abbreviated I&T) is the activity^[1] of software testing in which individual software modules are combined and tested as a group. It occurs after unit testing and before system testing.

Integration testing takes as its input modules that have been unit tested, groups them in larger aggregates, applies tests defined in an integration test plan to those aggregates, and delivers as its output the integrated system ready for system testing.