Quality Assurance and Testing with Chai - Run Functional Tests using a Headless Browser - failed

Quality Assurance and Testing with Chai - Run Functional Tests using a Headless Browser - failed
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I’ve passed all challenges Including Run Functional Tests using a Headless Browser II. But it’s Run Functional Tests using a Headless Browser telling me I’m failing the test.

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         test('submit "surname" : "Colombo" - write your e2e test...', function(done) {

        // fill the form...
        // then submit it pressing 'submit' button.
        //
        // in the callback...
        browser
          .fill('surname', 'Colombo')
          .pressButton('submit', function(){
            
            /** YOUR TESTS HERE, Don't forget to remove assert.fail() **/
            
            // pressButton is Async.  Waits for the ajax call to complete...

            // assert that status is OK 200
            browser.assert.success();
            // assert that the text inside the element 'span#name' is 'Cristoforo'
            browser.assert.text('span#name', 'Cristoforo');
            // assert that the text inside the element 'span#surname' is 'Colombo'
            browser.assert.text('span#surname', 'Colombo');
            // assert that the element(s) 'span#dates' exist and their count is 1
            browser.assert.element('span#dates', 1);
              
            done();   // It's an async test, so we have to call 'done()''
          });
          //assert.equal('span#dates', 1); 
           
        // 
      });