fix[indexes]: Inverted index to use default options as defined in its class

Author: lucassouzavieira

src/Collection/Index/Index.php

@@ -98,23 +98,22 @@ public function __construct(string $type, array $fields, array $attributes = [])
         }
 
         $fieldNames = [];
-
         foreach ($fields as $key => $field) {
             if (is_string($field)) {
-                array_push($fieldNames, $field);
+                $fieldNames[] = $field;
                 continue;
             }
 
             if (is_array($field)) {
-                array_push($fieldNames, $field['name']);
+                $fieldNames[] = $field['name'];
                 continue;
             }
 
             throw new InvalidParameterException("fields[$key]", $field);
         }
 
         $this->type = $type;
-        $this->fields = $fields;
+        $this->fields = $fieldNames;
 
         // Default values;
         $this->id = $attributes['id'] ?? '';

src/Collection/Index/InvertedIndex.php

@@ -5,11 +5,11 @@
 use ArangoDB\Validation\Exceptions\InvalidParameterException;
 
 /**
-* Inverted index representation
-*
-* @package ArangoDB\Collection\Index
-* @author Lucas S. Vieira
-*/
+ * Inverted index representation
+ *
+ * @package ArangoDB\Collection\Index
+ * @author Lucas S. Vieira
+ */
 final class InvertedIndex extends Index
 {
     /**
@@ -35,6 +35,7 @@ final class InvertedIndex extends Index
      */
     public function __construct(array $fields, array $attributes = [])
     {
+        $attributes = array_merge($this->defaultOptions, $attributes);
         parent::__construct('inverted', $fields, $attributes);
     }
 }