add testcase

lib/session/call-session.js

@@ -1792,7 +1792,7 @@ class CallSession extends Emitter {
     //this.logger.debug(`updating redis with ${JSON.stringify(this.callInfo)}`);
     this.updateCallStatus(Object.assign({}, this.callInfo.toJSON()), this.serviceUrl)
       .catch((err) => this.logger.error(err, 'redis error'));
-    
+
     if (this.wakeupResolver && !this.dlg && this.isCurrentCallHigherThan(CallStatus.Failed)) {
       // Someone is waiting for call to be final
       this.wakeupResolver({reason: 'session ended'});