import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
import { logger } from './logger.js';
describe('Logger', () => {
let consoleSpy: ReturnType<typeof vi.spyOn>;
beforeEach(() => {
consoleSpy = vi.spyOn(console, 'log').mockImplementation(() => {});
});
afterEach(() => {
consoleSpy.mockRestore();
});
describe('debug', () => {
it('should log debug message with cyan color', () => {
logger.debug('debug message');
expect(consoleSpy).toHaveBeenCalledTimes(1);
const logOutput = consoleSpy.mock.calls[0][0] as string;
expect(logOutput).toContain('[DEBUG]');
expect(logOutput).toContain('debug message');
expect(logOutput).toContain('\x1b[36m'); // cyan color
});
it('should log debug message with metadata', () => {
logger.debug('debug message', { key: 'value' });
const logOutput = consoleSpy.mock.calls[0][0] as string;
expect(logOutput).toContain('debug message');
expect(logOutput).toContain('{"key":"value"}');
});
});
describe('info', () => {
it('should log info message with green color', () => {
logger.info('info message');
expect(consoleSpy).toHaveBeenCalledTimes(1);
const logOutput = consoleSpy.mock.calls[0][0] as string;
expect(logOutput).toContain('[INFO]');
expect(logOutput).toContain('info message');
expect(logOutput).toContain('\x1b[32m'); // green color
});
it('should log info message with metadata', () => {
logger.info('info message', { count: 42 });
const logOutput = consoleSpy.mock.calls[0][0] as string;
expect(logOutput).toContain('info message');
expect(logOutput).toContain('{"count":42}');
});
});
describe('warn', () => {
it('should log warn message with yellow color', () => {
logger.warn('warn message');
expect(consoleSpy).toHaveBeenCalledTimes(1);
const logOutput = consoleSpy.mock.calls[0][0] as string;
expect(logOutput).toContain('[WARN]');
expect(logOutput).toContain('warn message');
expect(logOutput).toContain('\x1b[33m'); // yellow color
});
it('should log warn message with metadata', () => {
logger.warn('warn message', { warning: true });
const logOutput = consoleSpy.mock.calls[0][0] as string;
expect(logOutput).toContain('warn message');
expect(logOutput).toContain('{"warning":true}');
});
});
describe('error', () => {
it('should log error message with red color', () => {
logger.error('error message');
expect(consoleSpy).toHaveBeenCalledTimes(1);
const logOutput = consoleSpy.mock.calls[0][0] as string;
expect(logOutput).toContain('[ERROR]');
expect(logOutput).toContain('error message');
expect(logOutput).toContain('\x1b[31m'); // red color
});
it('should log error message with error object', () => {
const error = new Error('test error');
logger.error('error message', error);
const logOutput = consoleSpy.mock.calls[0][0] as string;
expect(logOutput).toContain('error message');
// Error objects are serialized as JSON, message property is included
expect(logOutput).toContain('message');
});
});
describe('timestamp format', () => {
it('should include ISO timestamp in log output', () => {
logger.info('test message');
const logOutput = consoleSpy.mock.calls[0][0] as string;
// ISO timestamp format: YYYY-MM-DDTHH:mm:ss.sssZ
expect(logOutput).toMatch(/\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}/);
});
});
describe('log without metadata', () => {
it('should not append extra content when no metadata provided', () => {
logger.info('simple message');
const logOutput = consoleSpy.mock.calls[0][0] as string;
expect(logOutput).toContain('simple message');
// Should end with the message and reset code, not with JSON
expect(logOutput).not.toContain('{}');
});
});
});
