- Install Jest for unit testing with React Testing Library - Install Playwright for end-to-end testing - Configure Jest with proper TypeScript support and module mapping - Create test setup files and utilities for both unit and e2e tests Components: * Jest configuration with coverage thresholds * Playwright configuration with browser automation * Unit tests for LoginForm, AuthContext, and useSocketIO hook * E2E tests for authentication, dashboard, and agents workflows * GitHub Actions workflow for automated testing * Mock data and API utilities for consistent testing * Test documentation with best practices Testing features: - Unit tests with 70% coverage threshold - E2E tests with API mocking and user journey testing - CI/CD integration for automated test runs - Cross-browser testing support with Playwright - Authentication system testing end-to-end 🚀 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
detect-newline 
Detect the dominant newline character of a string
Install
$ npm install detect-newline
Usage
const detectNewline = require('detect-newline');
detectNewline('foo\nbar\nbaz\r\n');
//=> '\n'
API
detectNewline(string)
Returns the detected newline or undefined when no newline character is found.
detectNewline.graceful(unknown)
Returns the detected newline or \n when no newline character is found or the input is not a string.
Related
- detect-newline-cli - CLI for this module
- detect-indent - Detect the indentation of code
License
MIT © Sindre Sorhus