# Write Test Cases

> Research and write test cases for a rule. Spawns a test-researcher to produce a coverage matrix, then test-case-writers (one per category) to create the files.

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

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# Write Test Cases for a Rule

Rule ID: `$ARGUMENTS`

## Step 1: Spawn the test-researcher agent

Spawn the `test-researcher` agent with:
- The rule ID: `$ARGUMENTS`
- The plan path (if known)

The researcher will produce a coverage matrix at `tests/Spire.Analyzers.Tests/$ARGUMENTS/coverage-matrix.md`.

## Step 2: Review the coverage matrix

Read the coverage matrix. Check:
- Are all relevant detection methods covered?
- Are all syntactic contexts enumerated?
- Are there enough should_pass cases for edge cases and false positives?
- Are the file names clear and consistent?

Add or remove cases as needed by editing the matrix.

## Step 3: Spawn test-case-writer agents

For each **category** in the matrix, spawn one `test-case-writer` agent in parallel:
- Tell it the rule ID: `$ARGUMENTS`
- Tell it which category to write (reference the section in the coverage matrix)

## Step 4: Verify

After all writers complete:
- Run `dotnet build` — the test project must compile cleanly.
- Count total case files vs matrix entries — ensure nothing was missed.
- Note: tests will FAIL at this stage because no analyzer exists yet. That is expected and correct (TDD).

## Constraints

- Review the matrix before spawning writers — this is the quality gate.
- If a writer runs out of budget, spawn another to continue the remaining cases from its category.
- Do NOT write case files yourself — delegate to the writer agents.