logger.test.ts•4.8 kB
import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest';
import { Logger, type LogMode } from '../../lib/logger.js';
// Mock fs operations
vi.mock('fs/promises', () => ({
appendFile: vi.fn(),
mkdir: vi.fn()
}));
vi.mock('fs', () => ({
existsSync: vi.fn(() => true)
}));
// Mock console methods
const consoleMocks = {
log: vi.spyOn(console, 'log').mockImplementation(() => {}),
error: vi.spyOn(console, 'error').mockImplementation(() => {}),
warn: vi.spyOn(console, 'warn').mockImplementation(() => {}),
debug: vi.spyOn(console, 'debug').mockImplementation(() => {})
};
describe('Logger', () => {
let logger: Logger;
beforeEach(() => {
logger = new Logger('test-logs', 'DEBUG', 'both'); // Use 'both' mode for existing tests
vi.clearAllMocks();
});
afterEach(() => {
Object.values(consoleMocks).forEach(mock => mock.mockClear());
});
it('should create a logger instance', () => {
expect(logger).toBeInstanceOf(Logger);
});
it('should log error messages', () => {
const message = 'Test error message';
const context = { userId: 123 };
const error = new Error('Test error');
logger.error(message, context, error);
expect(consoleMocks.error).toHaveBeenCalled();
// File system operations are mocked and tested indirectly through console output
});
it('should log warn messages', () => {
const message = 'Test warning message';
const context = { action: 'test' };
logger.warn(message, context);
expect(consoleMocks.warn).toHaveBeenCalled();
// File system operations are mocked and tested indirectly through console output
});
it('should log info messages', () => {
const message = 'Test info message';
logger.info(message);
expect(consoleMocks.log).toHaveBeenCalled();
// File system operations are mocked and tested indirectly through console output
});
it('should log debug messages', () => {
const message = 'Test debug message';
logger.debug(message);
expect(consoleMocks.debug).toHaveBeenCalled();
// File system operations are mocked and tested indirectly through console output
});
it('should respect log level settings', () => {
const warnLogger = new Logger('test-logs', 'WARN', 'both');
warnLogger.debug('This should not be logged');
warnLogger.info('This should not be logged');
warnLogger.warn('This should be logged');
warnLogger.error('This should be logged');
// Debug and info should not be called, warn and error should be
expect(consoleMocks.debug).not.toHaveBeenCalled();
expect(consoleMocks.log).not.toHaveBeenCalled();
expect(consoleMocks.warn).toHaveBeenCalled();
expect(consoleMocks.error).toHaveBeenCalled();
});
it('should change log level dynamically', () => {
logger.setLogLevel('ERROR');
logger.debug('Should not log');
logger.info('Should not log');
logger.warn('Should not log');
logger.error('Should log');
expect(consoleMocks.debug).not.toHaveBeenCalled();
expect(consoleMocks.log).not.toHaveBeenCalled();
expect(consoleMocks.warn).not.toHaveBeenCalled();
expect(consoleMocks.error).toHaveBeenCalled();
});
describe('Log Mode Tests', () => {
beforeEach(() => {
vi.clearAllMocks();
});
it('should log to console only in console mode', () => {
const consoleLogger = new Logger('test-logs', 'INFO', 'console');
consoleLogger.info('Test message');
expect(consoleMocks.log).toHaveBeenCalled();
});
it('should not log to console in file mode', () => {
const fileLogger = new Logger('test-logs', 'INFO', 'file');
fileLogger.info('Test message');
expect(consoleMocks.log).not.toHaveBeenCalled();
});
it('should log to console in both mode', () => {
const bothLogger = new Logger('test-logs', 'INFO', 'both');
bothLogger.info('Test message');
expect(consoleMocks.log).toHaveBeenCalled();
});
it('should not log anything in none mode', () => {
const noneLogger = new Logger('test-logs', 'INFO', 'none');
noneLogger.info('Test message');
noneLogger.warn('Test warning');
noneLogger.error('Test error');
noneLogger.debug('Test debug');
expect(consoleMocks.log).not.toHaveBeenCalled();
expect(consoleMocks.warn).not.toHaveBeenCalled();
expect(consoleMocks.error).not.toHaveBeenCalled();
expect(consoleMocks.debug).not.toHaveBeenCalled();
});
it('should default to file mode when no mode specified', () => {
const defaultLogger = new Logger('test-logs', 'INFO');
defaultLogger.info('Test message');
expect(consoleMocks.log).not.toHaveBeenCalled();
});
});
});