import { logger } from '../../../src/services/logger/logger';
import { afterEach,beforeEach, describe, expect, it, jest } from 'vitest';
describe('[Logger] Simple stderr logger', () => {
let stderrSpy: jest.SpiedFunction<typeof process.stderr.write>;
beforeEach(() => {
stderrSpy = vi.spyOn(process.stderr, 'write').mockImplementation(() => true);
});
afterEach(() => {
stderrSpy.mockRestore();
});
it('should export a logger instance with all methods', () => {
expect(logger).toBeDefined();
expect(typeof logger.info).toBe('function');
expect(typeof logger.error).toBe('function');
expect(typeof logger.warn).toBe('function');
expect(typeof logger.debug).toBe('function');
});
it('should write info messages to stderr', () => {
logger.info('test message');
expect(stderrSpy).toHaveBeenCalledWith(
expect.stringContaining('[INFO] mkdocs-mcp: test message')
);
});
it('should write error messages to stderr', () => {
logger.error('error message');
expect(stderrSpy).toHaveBeenCalledWith(
expect.stringContaining('[ERROR] mkdocs-mcp: error message')
);
});
it('should include metadata in log messages', () => {
logger.info('test with meta', { key: 'value' });
expect(stderrSpy).toHaveBeenCalledWith(
expect.stringContaining('{"key":"value"}')
);
});
it('should respect log level filtering', () => {
// Assuming default INFO level, debug should not log
logger.debug('debug message');
expect(stderrSpy).not.toHaveBeenCalled();
});
it('should format messages with timestamp and service name', () => {
logger.warn('warning message');
const call = stderrSpy.mock.calls[0][0] as string;
expect(call).toMatch(/^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}Z \[WARN\] mkdocs-mcp: warning message/);
});
});
