VibeCode Testing Strategy

VibeCode Testing Strategy

This document outlines the testing strategy for the VibeCode WebGUI project, detailing the different types of tests, their purpose, and how they fit into the development workflow.

Table of Contents

1. Testing Approach
2. Types of Tests
3. Accessibility Testing
4. Unit Testing
5. Integration Testing
6. End-to-End Testing
7. Testing in CI/CD
8. Best Practices

Testing Approach

VibeCode follows a comprehensive testing approach that combines several testing methodologies to ensure high-quality, maintainable code. Our testing pyramid consists of:

• Unit tests: Fast, focused tests for individual functions and components
• Integration tests: Testing interactions between modules and services
• End-to-End tests: Testing complete user flows and journeys
• Accessibility tests: Ensuring the application is accessible to all users

Each type of test serves a specific purpose in our quality assurance process, and together they provide confidence in the reliability and correctness of our application.

Types of Tests

Unit Tests

Unit tests focus on testing individual functions, components, or classes in isolation. They are designed to be fast, reliable, and to provide immediate feedback during development.

• Location: tests/unit/ and within __tests__ folders adjacent to the implementation
• Technology: Jest, React Testing Library
• Run Command: npm run test:unit

Example unit test:

import { sum } from '../math-utils';

describe('sum function', () => {
  it('should add two numbers correctly', () => {
    expect(sum(1, 2)).toBe(3);
  });
});

Integration Tests

Integration tests verify that different parts of the application work correctly together. These tests focus on the interactions between different modules, services, or components.

• Location: tests/integration/
• Technology: Jest, Supertest
• Run Command: npm run test:integration

Example integration test:

import { MongoDBChatService } from '../../src/lib/services/chat-mongodb';
import { createMockDatabase } from '../utils/mock-db';

describe('MongoDBChatService', () => {
  let service: MongoDBChatService;
  let mockDb: any;

  beforeEach(() => {
    mockDb = createMockDatabase();
    service = new MongoDBChatService(mockDb);
  });

  it('should create a new chat session', async () => {
    const result = await service.createSession('user123');
    expect(result.userId).toBe('user123');
  });
});

End-to-End Tests

End-to-End (E2E) tests simulate real user behavior and test the application as a whole, from the UI to the database.

• Location: tests/e2e/
• Technology: Playwright
• Run Command: npm run test:e2e

Example E2E test:

import { test, expect } from '@playwright/test';

test('user can log in and access dashboard', async ({ page }) => {
  await page.goto('/login');
  await page.fill('[data-testid="email-input"]', 'user@example.com');
  await page.fill('[data-testid="password-input"]', 'password');
  await page.click('[data-testid="login-button"]');
  await expect(page).toHaveURL('/dashboard');
});

Accessibility Testing

Accessibility testing is a critical part of our testing strategy, ensuring that our application is usable by people with disabilities.

Automated Accessibility Tests

We use automated tools to catch common accessibility issues:

• axe-core: Integrated with our testing framework to check for accessibility violations
• jest-axe: Used in unit and integration tests to verify component accessibility
• @axe-core/playwright: Used in E2E tests to verify page-level accessibility

Location: tests/accessibility/

Example accessibility test:

import { render } from '@testing-library/react';
import { axe, toHaveNoViolations } from 'jest-axe';
import Button from '../components/Button';

expect.extend(toHaveNoViolations);

describe('Button component', () => {
  it('should have no accessibility violations', async () => {
    const { container } = render(<Button>Click me</Button>);
    const results = await axe(container);
    expect(results).toHaveNoViolations();
  });
});

Manual Accessibility Testing

In addition to automated tests, we conduct periodic manual accessibility reviews using:

• Keyboard navigation
• Screen readers (e.g., NVDA, VoiceOver)
• High contrast mode
• Various zoom levels

Accessibility Audit Workflow

1. Run automated tests as part of the CI/CD pipeline
2. Conduct periodic manual reviews
3. Address issues in order of severity
4. Document patterns and solutions in the accessibility guide

Testing in CI/CD

Our CI/CD pipeline includes automated testing to ensure code quality before deployment:

1. Linting and Type Checking: Run ESLint and TypeScript type checking
2. Unit and Integration Tests: Run all unit and integration tests
3. Accessibility Tests: Run automated accessibility tests
4. End-to-End Tests: Run critical E2E tests
5. Performance Tests: Run performance tests for critical paths

Test are configured in our GitHub Actions workflows in .github/workflows/.

Best Practices

Writing Tests

• Test Isolation: Each test should be independent and not rely on the state from other tests
• Arrange-Act-Assert: Structure tests with clear setup, action, and assertion phases
• Meaningful Assertions: Test for behavior, not implementation details
• Test Coverage: Aim for high test coverage, especially for critical paths
• Maintainability: Keep tests simple and focused on a single behavior
• Mock External Dependencies: Use mocks for external services and APIs

Mocking

For effective testing, we use mocking to isolate the code being tested:

• Jest Mock Functions: For simple function mocking
• MSW (Mock Service Worker): For mocking API requests
• Mock Implementations: For complex dependencies

Example mocking:

// Mock a module
jest.mock('uuid', () => ({
  v4: jest.fn(() => 'test-uuid-123')
}));

// Mock a function
const mockFunction = jest.fn().mockReturnValue('mocked value');

// Mock a fetch request with MSW
import { rest } from 'msw';
import { setupServer } from 'msw/node';

const server = setupServer(
  rest.get('/api/data', (req, res, ctx) => {
    return res(ctx.json({ data: 'mocked data' }));
  })
);

beforeAll(() => server.listen());
afterEach(() => server.resetHandlers());
afterAll(() => server.close());

Test Documentation

• Include comments explaining complex test scenarios
• Use descriptive test and describe blocks to document behavior
• Keep test documentation up-to-date when implementation changes

Conclusion

This testing strategy is designed to ensure the quality, reliability, and accessibility of the VibeCode WebGUI application. By following these guidelines, we can maintain a high standard of code quality and user experience.