✅ Fix test

src/tests/index.test.ts

@@ -1,14 +1,9 @@
 import 'jest-extended';
+import isString = require('lodash.isstring');
 import { Writable } from 'stream';
+import loggerFactory from '..';
 import { levels } from '../levels';
 
-let loggerFactory;
-
-beforeEach(() => {
-    jest.resetModules();
-    loggerFactory = require('..').default;
-});
-
 test('can create default logger', () => {
     const logger = loggerFactory();
     expect(logger).toBeDefined();
@@ -55,15 +50,15 @@ test('can use warning level', () =>
 
 test('child logger has warning level', () =>
     new Promise((resolve, reject) => {
-        loggerFactory({
+        const rootLogger = loggerFactory({
             streams: [
                 testWriteStream(resolve, json => {
                     expect(json.message).toContain('Hello');
                     expect(json.level).toBe(levels.warn);
                 }),
             ],
         });
-        const childLogger = loggerFactory('child');
+        const childLogger = rootLogger('child');
 
         childLogger.warning('Hello');
     }));