[TIMOB-25676] iOS: HTTPClient unit-test sometimes fails because of incorrect states

   
   function textXHR() {
     var xhr = Ti.Network.createHTTPClient(),
       attempts = 3,
       dataStreamFinished = false;
     xhr.setTimeout(3e4);
   
     xhr.onreadystatechange = function () {
       Ti.API.info(this.readyState);
       if (this.readyState === this.DONE) {
         if (dataStreamFinished === true) {
           Ti.API.info('DONE');
         } else {
           alert('ERROR: onreadystatechange done fired before 100% progress');
         }
       }
     };
   
     xhr.ondatastream = function (e) {
       if(e.progress == null) {
         alert('Error: Progress null!')
       };
       if (e.progress >= 1.0) {
         dataStreamFinished = true;
       }
     };
   
     xhr.onerror = function (e) {
       if (attempts-- > 0) {
         Ti.API.warn('failed, attempting to retry request...');
         xhr.send();
       } else {
         Ti.API.debug(JSON.stringify(e, null , 2));
         Ti.API.error(e.error || this.responseText);
       }
     };
   
     xhr.open('GET', 'http://www.appcelerator.com/assets/The_iPad_App_Wave.pdf');
     xhr.send();
   }
   
   var win = Ti.UI.createWindow({
     backgroundColor: '#fff'
   });
   
   var btn = Ti.UI.createButton({
     title: 'Trigger'
   });
   
   btn.addEventListener('click', textXHR);
   
   win.add(btn);
   win.open();