Warn when classes are used in testing environment; this means tests aren't efficient.

app/Helpers/Attachments/AttachmentHelper.php

@@ -63,8 +63,13 @@ class AttachmentHelper implements AttachmentHelperInterface
         $this->messages      = new MessageBag;
         $this->attachments   = new Collection;
         $this->uploadDisk    = Storage::disk('upload');
+
+        if ('testing' === env('APP_ENV')) {
+            Log::warning(sprintf('%s should not be instantiated in the TEST environment!', \get_class($this)));
+        }
     }
 
+
     /**
      * Returns the content of an attachment.
      *