Validate passwords using higher-order functions in Javascript

validate.js

/** Helper for printing validator reason */
const warn = msg => {
    console.warn('Invalid:', msg)
    return false
}

/** Validators */
const longEnough = (password, minLength = 12) => password.length >= minLength || warn(`Password should contain ${minLength} or more characters.`)
const hasUpperCase = password => /[A-Z]+/.test(password) || warn('Password should have at least one uppercase letter.')
const hasLowerCase = password => /[a-z]+/.test(password) || warn('Password should have at least one lowercase letter.')
const hasNumbers = password => /[0-9]+/.test(password) || warn('Password should have at least one number.')

/** Higher-order function to run the given validators */
const validate = password => (...fns) => fns.every(fn => fn(password))

const validator = validate('SUP3RsECREtP4ssW0rd')
console.log(validator(
    longEnough,
    hasUpperCase,
    hasLowerCase,
    hasNumbers,
)) // => true