Test Generation
to handle such an explosion in the number of equivalence classes
are discussed in Sections 2.2, 2.6, and in Chapter 4.
4. Identify infeasible equivalence classes: An infeasible equivalence
class is one that contains a combination of input data that can-
not be generated during test. Such an equivalence class might arise
due to several reasons. For example, suppose that an application is
tested via its GUI, that is data is input using commands available
in the GUI. The GUI might disallow invalid inputs by offering a
palette of valid inputs only. There might also be constraints in the
requirements that render certain equivalence class infeasible.
Infeasible data is a combination of input values that cannot
be input to the application under ...