title: 'Describe is not defined' when running my test
body: <p>I'm getting the following error when running my test case with <a href="https://mochajs.org/" rel="nofollow noreferrer">mocha</a></p>
  
  <pre><code>ReferenceError: describe is not defined
      at Object.&lt;anonymous&gt; (/myproject/test/unit/physicalperson.spec.js:12:1)
  </code></pre>
  
  <p>Someone knows why this is happens? </p>
  
  <p><strong>package.json</strong>  </p>
  
  <pre><code>"scripts": {
      "test": "mocha"
    },
  </code></pre>
  
  <p><strong>physicalperson.spec.js</strong></p>
  
  <pre><code>const request = require('supertest-as-promised');
  const chai = require('chai');
  const app = require('../../src/server');
  
  const expect = chai.expect;
  const PHYSICALPERSON_ENDPOINT = '/api/physicalperson';
  
  describe('Integration tests for Physical Person', () =&gt; {
    describe('\nFAIL Cases - Physical Person', () =&gt; {
      it('should return 404 status if physical person is not present on database', (done) =&gt; {
        request(app)
          .get(`${PHYSICALPERSON_ENDPOINT}/xxap`)
          .then((res) =&gt; {
            expect(res.statusCode).to.equal(404);
            done();
          })
          .catch((err) =&gt; {
            done(err);
          });
      });
    });
  });
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/224BO.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/224BO.png" alt="enter image description here"></a>
  <a href="https://i.stack.imgur.com/hklnK.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/hklnK.png" alt="enter image description here"></a></p>
  
  <p><strong>What I've Try</strong></p>
  
  <p>I saw some threads here in <a href="https://stackoverflow.com/questions/28400459/referenceerror-describe-is-not-defined-nodejs">SO</a>, and I also try the following code below, but the same error occurs.</p>
  
  <pre><code>  var mocha = require('mocha')
    var describe = mocha.describe
    var it = mocha.it
    var assert = require('chai').assert
  
    describe('#indexOf()', function() {
      it('should return -1 when not present', function() {
        assert.equal([1,2,3].indexOf(4), -1)
      })
    })
  </code></pre>