assert.js

    function assert(condition, message) {
      if (condition) console.log(message)
      else console.log('Assertion failed')
    }

    var text = 'Ricky!'

    function useless(ninjaCallback) {
      console.log('Inside USELESS function')
      return ninjaCallback()
    }

    function getText() {
      console.log('Inside getText function')
      return text
    }
    console.log('functions are now defined...')

    console.log('Before making the calls....')


    assert(useless(getText) === text, 'The function worked: ' + text)
    assert(function() {return text} == text, "passed")

    console.log('All calls have been made')