| In order to execute the testing of a unit or an integration step satisfactorily, it is necessary in a number of cases to
create stubs (also known as mock objects) or drivers. The stubs replace units that are called by the units to be
tested. The drivers create units that call the units to be tested. The communication between the units to be tested and the
stubs and drivers takes place by means of an interface. The stubs and drivers should be such that these interfaces contain
realistic values and correspond with the eventual, actual interfaces between the various units. Of course, the stubs and
drivers themselves are also subjected to testing. |
