Test Design Patterns — Systematic Test Design Guide

Methodologies for systematically deriving and effectively structuring test cases.

Test Case Derivation Techniques

1. Equivalence Partitioning

Input: Age (integer 1-150)
+-- Valid class: [1, 150] -> representative: 25
+-- Invalid class 1: < 1   -> representative: 0, -1
+-- Invalid class 2: > 150 -> representative: 151, 999
+-- Invalid class 3: non-integer -> representative: 25.5, "abc"
+-- Invalid class 4: null  -> representative: null, undefined

2. Boundary Value Analysis