import { jest } from "@jest/globals"; import { generator } from '../src/'; beforeEach(() => { jest.spyOn(global.Math, 'floor').mockReturnValue(23); }); afterEach(() => { jest.spyOn(global.Math, 'floor').mockRestore(); }); test("should return a string of xxxxxxxxx", () => { expect(generator({ charsQty: 10, isUppercase: false, haveNumbers: false, haveSymbols: false })).toBe("xxxxxxxxxx"); });