2.4.2 Equivalence Partitioning

• Black-box technique that divides the input domain into classes of data from which test cases can be derived
• An ideal test case uncovers a class of errors that might require many arbitrary test cases to be executed before a general error is observed
• Equivalence class guidelines:
1. If input condition specifies a range, one valid and two invalid equivalence classes are defined
2. If an input condition requires a specific value, one valid and two invalid equivalence classes are defined
3. If an input condition specifies a member of a set, one valid and one invalid equivalence class is defined
4. If an input condition is Boolean, one valid and one invalid equivalence class is defined