MAGETWO-87190: Test coverage for critical logic

Author: Sergii Kovalenko

lib/internal/Magento/Framework/Shell.php

@@ -56,6 +56,7 @@ public function execute($command, array $arguments = [])
 
         exec($command, $output, $exitCode);
         $output = implode(PHP_EOL, $output);
+        var_dump($command);
         var_dump($output);
         $this->log($output);
         if ($exitCode) {