# Kotlin Unit Test

> Smart Kotlin unit testing with auto-detection, coverage analysis, and AI edge cases. Use when generating tests for biz/ layer classes, analyzing test coverage gaps, or discovering edge cases.

- Skill: `majiayu000/kotlin-unit-test` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add majiayu000/kotlin-unit-test`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/kotlin-unit-test/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/kotlin-unit-test

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# Kotlin Unit Test

Project-specific skill for intelligent Kotlin unit testing.

## When to Use

- Generating tests for business logic classes (biz/ layer)
- Analyzing test coverage gaps
- Discovering edge cases for existing code
- Before writing new tests to understand what's missing

## Workflow

1. **Analyze class**: `python scripts/analyze_kotlin.py units <file.kt>`
2. **Check coverage**: `python scripts/analyze_kotlin.py coverage <source_dir> <test_dir>`
3. **Discover edge cases**: Load `references/edge-case-discovery.md`
4. **Write tests**: Follow patterns in `references/test-patterns.md`

## Script Commands

```bash
# Analyze single file - extract testable units
python scripts/analyze_kotlin.py units app/src/main/.../SomeClass.kt

# Analyze coverage gaps between source and test directories
python scripts/analyze_kotlin.py coverage app/src/main/java/.../biz app/src/test/java/.../biz
```

## Output Format

JSON structured output for parsing:
```json
{
  "class_name": "SomeClass",
  "methods": [...],
  "dependencies": [...],
  "coverage": {"tested": [], "missing": []}
}
```

## References

| File | Purpose |
|------|---------|
| `references/test-patterns.md` | JUnit4 + MockK + Turbine patterns |
| `references/edge-case-discovery.md` | AI prompts for finding edge cases |

## Integration

Works with `.claude/agents/unit-test-agent.md` for test generation workflow.