const assert = require('assert');


class BankCustomer{

constructor(name, pin){
    let secretName = name
    let secretPin = pin
    this.getName = () => secretName
    this.verifyPinInput = (pin) => secretPin === pin;
}
}



const customer = new BankCustomer('John Doe', '3579');
assert.equal(typeof customer.getName, 'function');
assert.equal(typeof customer.verifyPinInput, 'function');
assert.equal(customer.getName(), 'John Doe');
assert.ok(customer.verifyPinInput('3579'));