- Fixed the match_all query test

- Added the tutorial link to the README file

Author: babenkoivan

README.md

@@ -8,6 +8,7 @@ Check out its [features](#features)!
 
 ## Contents
 
+* [Tutorial](#tutorial)
 * [Features](#features)
 * [Requirements](#requirements)
 * [Installation](#installation)
@@ -19,6 +20,11 @@ Check out its [features](#features)!
 * [Search rules](#search-rules)
 * [Available filters](#available-filters)
 
+## Tutorial
+
+For your convenience I wrote step-by-step tutorial - [How to make Laravel and Elasticsearch become friends](https://medium.com/@babenko.i.a/how-to-make-laravel-and-elasticsearch-become-friends-55ed7690331c). 
+There are information about Elasticsearch installation and the package usage examples, don't miss it!    
+
 ## Features
 
 * An easy way to [configure](#index-configurator) and [create](#console-commands) an Elasticsearch index.

tests/ElasticEngineTest.php

@@ -583,9 +583,7 @@ public function test_if_the_search_method_with_an_asterisk_builds_correct_payloa
                     'query' => [
                         'bool' => [
                             'must' => [
-                                'match_all' => [
-
-                                ]
+                                'match_all' => new \stdClass()
                             ]
                         ]
                     ]