Building & Testing

Comprehensive testing strategies and best practices for ensuring code quality and reliability in MegaVault.

Testing Overview
Unit Testing
Integration Testing
End-to-End Testing
Mobile Testing
CI/CD Integration

Testing Overview

MegaVault employs a multi-layered testing approach covering unit tests, integration tests, end-to-end tests, and mobile testing to ensure reliability and user experience.

Testing Stack

Modern testing tools

✅ Jest for unit testing
✅ React Testing Library
✅ Playwright for E2E
✅ Flutter testing framework

Coverage Goals

Quality metrics

✅ 80%+ code coverage
✅ All critical paths tested
✅ Performance monitoring
✅ Automated CI/CD testing

Test Types

Comprehensive coverage

✅ Unit tests (70%)
✅ Integration tests (20%)
✅ E2E tests (10%)
✅ Mobile tests

💡

Testing Philosophy

Our testing approach prioritizes fast feedback loops, user-focused scenarios, and comprehensive coverage of critical functionality.

Unit Testing

Unit tests provide fast feedback and ensure individual components work correctly.

Component Testing

Button.test.tsx

import { render, screen } from '@testing-library/react';
import userEvent from '@testing-library/user-event';
import { Button } from '@/components/ui/Button';

describe('Button Component', () => {
  it('renders and handles clicks', async () => {
    const handleClick = jest.fn();
    render(<Button onClick={handleClick}>Click me</Button>);
    
    await userEvent.click(screen.getByRole('button'));
    expect(handleClick).toHaveBeenCalledTimes(1);
  });

  it('shows loading state', () => {
    render(<Button loading>Loading</Button>);
    expect(screen.getByText('Loading...')).toBeInTheDocument();
    expect(screen.getByRole('button')).toBeDisabled();
  });
});

Hook Testing

useAuth.test.ts

import { renderHook, act } from '@testing-library/react';
import { useAuth } from '@/hooks/useAuth';

describe('useAuth Hook', () => {
  it('handles login flow', async () => {
    const { result } = renderHook(() => useAuth());
    
    await act(async () => {
      await result.current.login('test@example.com', 'password');
    });
    
    expect(result.current.isAuthenticated).toBe(true);
  });
});

Running Tests

Test Commands

# Run all tests
npm run test

# Run with coverage
npm run test:coverage

# Run in watch mode
npm run test:watch

# Run specific test
npm run test Button.test.tsx

Integration Testing

Integration tests verify API endpoints and service interactions work correctly.

API Testing

import { createMocks } from 'node-mocks-http';
import handler from '@/app/api/auth/signin/route';

describe('/api/auth/signin', () => {
  it('authenticates valid user', async () => {
    const { req, res } = createMocks({
      method: 'POST',
      body: { email: 'test@example.com', password: 'password' },
    });

    await handler(req, res);
    expect(res._getStatusCode()).toBe(200);
  });
});

End-to-End Testing

E2E tests validate complete user workflows using Playwright.

User Flow Test

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

test('file upload workflow', async ({ page }) => {
  // Login
  await page.goto('/auth/signin');
  await page.fill('[data-testid=email]', 'test@example.com');
  await page.fill('[data-testid=password]', 'password123');
  await page.click('[data-testid=signin-button]');

  // Upload file
  await page.goto('/dashboard/files');
  const fileChooser = page.waitForEvent('filechooser');
  await page.click('[data-testid=upload-button]');
  const chooser = await fileChooser;
  await chooser.setFiles('test-file.pdf');

  // Verify upload
  await expect(page.locator('[data-testid=file-list]')).toContainText('test-file.pdf');
});

Running E2E Tests

Playwright Commands

# Run E2E tests
npm run test:e2e

# Run with UI
npm run test:e2e:ui

# Run specific browser
npx playwright test --project=chromium

Mobile Testing

Flutter mobile app testing includes widget tests and integration tests.

Widget Test

import 'package:flutter_test/flutter_test.dart';
import 'package:megavault/widgets/file_list.dart';

void main() {
  testWidgets('FileList displays files', (WidgetTester tester) async {
    await tester.pumpWidget(FileList(files: mockFiles));
    expect(find.text('document.pdf'), findsOneWidget);
  });
}

Flutter Test Commands

# Run mobile tests
cd megavault_mobile
flutter test

# Run with coverage
flutter test --coverage

# Integration tests
flutter test integration_test/

CI/CD Integration

Automated testing pipeline ensures code quality before deployment.

GitHub Actions

name: Test Suite
on: [push, pull_request]

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v3
    - uses: actions/setup-node@v3
      with:
        node-version: '18'
    
    - run: npm ci
    - run: npm run lint
    - run: npm run test:ci
    - run: npm run test:e2e
    
    - name: Upload coverage
      uses: codecov/codecov-action@v3

✅

Quality Gates

All tests must pass, coverage above 80%, and no linting errors before merge.

Next Steps

Development Setup →

Set up your testing environment

Deployment →

Deploy your tested changes

API Reference →

API testing documentation