White-box testing The real point is that tests are usually designed from an abstract structure such as the input space, a graph, or logical predicates, and the question is what level of abstraction we derive that abstract structure from. That can be the source code, requirements, input space descriptions, or one of dozens of types of design models. Therefore, the "white-box / black-box" distinction is less important and the terms are less relevant. In penetration testing, white-box testing refers to a methodology where a white hat hacker has full knowledge of the system being attacked. The goal of a white-box penetration test
Black or White skit that precedes the album version of the song. Slash did, however, play the main riff during live performances of the song. To prepare the audience for the special occasion of the televised premiere of the "Black or White" video, Epic records released the song (without the accompanying images) to radio stations just two days in advance. In a period of twenty-four hours, "Black or White", described by the record company as "a rock 'n' roll dance song about racial harmony", had been added to the playlists of 96 percent of 237 of the United States of America's top forty