Add Comprehensive Test Suite

[Christiantyemele]

Description

Create a comprehensive test suite covering unit tests, integration tests, and E2E tests for the application.

Tasks

Unit Tests

• Test all utility functions in lib/utils/
• Test Zod validation schemas in types/schemas.ts
• Test UI component rendering
• Test component prop validation

Integration Tests

• Test API routes for projects CRUD
• Test API routes for tasks CRUD
• Test API routes for comments
• Test authentication flows
• Test database operations with Supabase

E2E Tests

• Test user registration and login flow
• Test project creation and management
• Test task creation and assignment
• Test commenting system
• Test real-time updates across tabs

Setup

• Install and configure Jest or Vitest
• Install and configure React Testing Library
• Install and configure Playwright for E2E tests
• Set up test database environment
• Add test scripts to package.json

Acceptance Criteria

• All tests pass locally and in CI
• Test coverage is above 80%
• Tests are well-documented and maintainable
• CI pipeline runs tests on every push
• Mock Supabase client for testing