The 'AccountProcessor' class did not achieve 100% code coverage via your test methods.

Please help me out here , I Couldnt complete this Challenge , im getting this error "The 'AccountProcessor' class did not achieve 100% code coverage via your test methods. Make sure that you chose 'Run All' tests in the Developer Console at least once before attempting to verify this challenge " , I even tried to solve this problem by searchig the solutions over Trailhead Community Help and Found this GitHub Link 

https://github.com/Mulodo-Salesforce-Training/trailhead-salesforce-challenge/blob/master/Future.md

And tried to solve as per this link , But Still im getting the same Error .