arborlogic/openzerocode/tdd

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Use when implementing any feature or bugfix, before writing implementation code

Install

npx vskill@latest install arborlogic/openzerocode/tdd

SKILL.md

Test-Driven Development (TDD)

Overview

Write the test first. Watch it fail. Write minimal code to pass.

The Iron Law

NO PRODUCTION CODE WITHOUT A FAILING TEST FIRST

Red-Green-Refactor

  1. RED — Write one failing test
  2. GREEN — Write minimal code to pass
  3. REFACTOR — Clean up while staying green
  4. Repeat — back to RED with the next behavior

RED - Write Failing Test

Write one minimal test showing what should happen.

typescript
test('retries failed operations 3 times', async () => {
  let attempts = 0;
  const operation = () => {
    attempts++;
    if (attempts < 3) throw new Error('fail');
    return 'success';
  };
  const result = await retryOperation(operation);
  expect(result).toBe('success');
  expect(attempts).toBe(3);
});

Verify RED - Watch It Fail

MANDATORY. Never skip.

bash
npm test path/to/test.test.ts

Confirm:

  • Test fails (not errors)
  • Failure message is expected
  • Fails because feature missing (not typos)

GREEN - Minimal Code

Write simplest code to pass the test.

typescript
async function retryOperation<T>(fn: () => Promise<T>): Promise<T> {
  for (let i = 0; i < 3; i++) {
    try {
      return await fn();
    } catch (e) {
      if (i === 2) throw e;
    }
  }
  throw new Error('unreachable');
}

Verify GREEN - Watch It Pass

MANDATORY.

bash
npm test path/to/test.test.ts

Confirm:

  • Test passes
  • Other tests still pass

REFACTOR - Clean Up

After green only:

  • Remove duplication
  • Improve names
  • Extract helpers

Keep tests green. Don't add behavior.

Security

  • Security scanPassed, 90 of 100Pattern checks on the skill's files.
  • Model reviewPassed

See the full security report

Quality evaluation

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Source

Popularity

Repository stars
16
7-day trend score
0

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