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test-design-patterns

Patterns for effective test design, including boundary value analysis, equivalence partitioning, state transition testing, and other systematic test case derivation methodologies. Use this skill for 'test design', 'test case derivation', 'boundary value analysis', 'equivalence partitioning', 'state transition testing', 'pairwise', 'test matrix', and other test design tasks. Enhances the test design capabilities of test-strategist and unit-tester. Note: test infrastructure setup and CI/CD configuration are outside the scope of this skill.

en/24-test-automation/.claude/skills/test-design-patterns/skill.md

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# 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"