Equivalence Class Partitioning

This divides the input data into classes of data from which test cases can be derived. Equivalence partitioning reduces the number of test cases needed. Equivalence class represents a set of valid or invalid class for input conditions.

Equivalence classes may be defined according to following guidelines:

• If an input condition specifies a range, one valid and two invalid equivalence classes are defined.
• If an input condition requires a specific value, then one valid and two invalid equivalence classes are defined.
• If an input condition specifies a member of a set, then one valid and one invalid equivalence class are defined.
• If an input condition is boolean, then one valid and one invalid equivalence class are defined.