const assert = require('assert');

// ... mon code ...

class BankCustomer {
    constructor(name, key) {
        let customer = name;
        let pinCode = key;

        this.getName = () => customer;

        this.verifyPinInput = (input) => {
            if (input === pinCode) {
                return true;
            } else {
                return false;
            }
        }
    }
}

// Tests
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'));