const validateIban = require('../validateIban'); describe('IBAN validation', () => { it('should return false for non-IBAN input', () => { let isValid = validateIban('Pepinillos'); expect(isValid).toBeFalsy(); }); it('should return false for invalid spanish IBAN input', () => { let isValid = validateIban('ES00 9999 0000 9999 0000 9999'); expect(isValid).toBeFalsy(); }); it('should return true for valid spanish IBAN', () => { let isValid = validateIban('ES91 2100 0418 4502 0005 1332'); expect(isValid).toBeTruthy(); }); });