MAGETWO-87190: Test coverage for critical logic

Author: Sergii Kovalenko

lib/internal/Magento/Framework/Config/Reader/Filesystem.php

@@ -125,6 +125,7 @@ public function read($scope = null)
         $scope = $scope ?: $this->_defaultScope;
         $fileList = $this->_fileResolver->get($this->_fileName, $scope);
         if (!count($fileList)) {
+            var_dump('MISSSS', $scope);
             return [];
         }
         $output = $this->_readFiles($fileList);

lib/internal/Magento/Framework/Module/Dir/Reader.php

@@ -105,11 +105,11 @@ public function getComposerJsonFiles()
      */
     private function getFilesIterator($filename, $subDir = '')
     {
-        #if (!isset($this->fileIterators[$subDir][$filename])) {
+        if (!isset($this->fileIterators[$subDir][$filename])) {
             $this->fileIterators[$subDir][$filename] = $this->fileIteratorFactory->create(
                 $this->getFiles($filename, $subDir)
             );
-        #}
+        }
         return $this->fileIterators[$subDir][$filename];
     }