git:20260917.3d83f4c to git:20261005.042befb

---

name: tdd-with-phpunit

description: Apply RED-GREEN-REFACTOR with PHPUnit 10/11 for Symfony; KernelTestCase/WebTestCase, attributes (#[Test]/#[DataProvider]), Foundry

capabilities: [read, search, edit, shell]

tags: [testing, tdd]

# projected by `bun run build` — do not edit by hand

allowed-tools:

- Read

- Glob

- Grep

- Write

- Edit

- Bash

---

# Tdd With Phpunit (Symfony)

## Use when

- Building regression-safe behavior with TDD/functional/e2e tests.

- Converting bug reports into executable failing tests.

## Default workflow

1. Write failing test for target behavior and one boundary case.

2. Implement minimal code to pass.

3. Refactor while preserving green suite.

4. Broaden coverage for invalid/unauthorized/not-found paths.

## Guardrails

- Prefer deterministic fixtures/builders.

- Assert observable behavior, not internal implementation.

- Keep tests isolated and stable in CI.

## Progressive disclosure

- Use this file for execution posture and risk controls.

- Open references when deep implementation details are needed.

## Output contract

- RED/GREEN/REFACTOR trace.

- Test files changed and executed commands.

- Coverage and confidence notes.

## References

- `reference.md`