function getXMLHttpRequest(callback) { var req = new XMLHttpRequest(); req.onreadystatechange = function() { if (req.readyState !== this.DONE) { return false; } if (req.status !== 200) { console.log("status " + req.status); return false; } return callback(req.response); } req.open("GET", "https://api.chucknorris.io/jokes/random", true); req.send(); }

import unittest
    class TestGetJoke(unittest.TestCase):
      def test_get_joke(self):
        self.assertTrue(get_joke())