| name | testing |
| description | Write and manage tests using TDD with Pest (PHP), Vitest (React), pytest (Python), and Playwright (E2E). Use when writing feature tests, unit tests, component tests, or improving test coverage. EXCLUSIVE to testing-expert agent. |
| allowed-tools | Read, Edit, Bash, Grep, Glob, Write, mcp_context7 |
Testing
Exclusive to: testing-expert agent
📚 Context7 (Memory) — Up-to-Date Docs
Lookup testing patterns and assertions:
mcp_context7_resolve-library-id(libraryName="pytest", query="fixtures async")
mcp_context7_query-docs(libraryId="/pytest-dev/pytest", query="parametrize examples")
Validation Loop (MANDATORY)
After writing or modifying tests, always verify:
composer test # PHP tests pass
npm run test # JS tests pass (if applicable)
TDD Feedback Loop:
- Write test → Verify it FAILS (Red)
- Implement minimal code → Verify it PASSES (Green)
- Refactor → Verify it still PASSES
- Repeat for edge cases
Instructions (TDD Workflow)
| Step | Action | Verification |
|---|---|---|
| 1 | Write failing test | composer test --filter=NewTest → FAILS |
| 2 | Implement minimal code | composer test --filter=NewTest → PASSES |
| 3 | Refactor | composer test → ALL PASS |
| 4 | Add edge cases | Repeat steps 1-3 |
Pest Patterns (Laravel)
Feature Test
test('user can create post', function () {
$user = User::factory()->create();
$this->actingAs($user)
->post('/posts', ['title' => 'Test'])
->assertRedirect('/posts');
$this->assertDatabaseHas('posts', ['title' => 'Test']);
});
Unit Test
test('generates slug from title', function () {
expect((new SlugGenerator)->generate('Hello World'))
->toBe('hello-world');
});
Vitest Patterns (React)
describe('PostForm', () => {
it('submits with valid data', async () => {
const onSubmit = vi.fn();
render(<PostForm onSubmit={onSubmit} />);
await userEvent.type(screen.getByLabelText(/title/i), 'Test');
await userEvent.click(screen.getByRole('button', { name: /submit/i }));
expect(onSubmit).toHaveBeenCalled();
});
});
Test Commands
# Laravel
composer test
php artisan test --filter=PostTest
php artisan test --coverage
# React
npm run test
npm run test:watch
npm run test:coverage
Examples
- "Write tests for PostController"
- "Add unit tests for this service"
- "Fix failing test"