is-credit-card/index.test.js

a simple script for verifying credit card number.

var isCredit = require('./index');

describe('isCreditCard', function () {
  it('should throw error when credit card is invalid', function () {
    expect(() => isCredit('123')).toThrow(/invalid card number/);
  });
  it('should return true when the credit card is valid', function () {
    expect(isCredit('4816549819447220')).toBe(true);
  });
  it('should return false when the credit card is invalid', function () {
    expect(isCredit('1111111111111111')).toBe(false);
  });
});