Function assert

test/regression/testBookIn.js:163–168

(value, failMessage, passMessage)

let passed = true;
const assert = function(value, failMessage, passMessage) {
  if (!value) {
    if (failMessage) console.log(failMessage);
    passed = false;
  } else if (passMessage) console.log(passMessage);
};

const assertFont = function(value, expected, address) {
  assert(value, `Expected to find font object at ${address}`);