humanparser JavaScript Bug Squash

humanparser is a third-party library we use at Remind to parse a human name string into salutation, first name, middle name, last name, and suffix.

Your Goal

Your goal is to find the root cause of the bug described below, then fix it if you have time!

The Bug

When parseName is called for a salutation and last name only, it is returning the last name as the first name:

const human = require("humanparser")
const attrs = human.parseName("Ms. Smith")
console.log(attrs);

actual:

{ 
    salutation: 'Ms.',
    firstName: 'Smith',
    lastName: '',
    fullName: 'Ms. Smith'
}

expected:

{ 
    salutation: 'Ms.',
    firstName: '',
    lastName: 'Smith',
    fullName: 'Ms. Smith'
}