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const Mocha = require('mocha');
const assert = require('assert');
const mocha = new Mocha();
const jsdom = require("jsdom");

const { JSDOM } = jsdom;
const { document } = (new JSDOM('<!DOCTYPE html><div class="class1">Hello World</div>')).window;

function getContentByClassName(className) {
  let elements = document.getElementsByClassName(className);

  if (elements.length === 0) {
    return '';
  }

  return elements[0].textContent;
}

mocha.suite.emit('pre-require', this, 'solution', mocha);

describe('Test suite', function() {
  it('should work', function() {
    assert(true);
  });
});

describe('#getContentByClassName', function() {
  it('should return the content of a class', function() {
    assert(getContentByClassName('class1') === 'Hello World');
  });

  it('should return an empty string if given a non existent class', function() {
    assert(getContentByClassName('class2') === '');
  });
});

mocha.run();