[增添]添加了datasource的setting数据库以及默认值

vendor/anourvalar/eloquent-serialize/tests/GroupByTest.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace AnourValar\EloquentSerialize\Tests;
+
+use AnourValar\EloquentSerialize\Tests\Models\User;
+
+class GroupByTest extends AbstractSuite
+{
+    /**
+     * @return void
+     */
+    public function testSimple()
+    {
+        // One column
+        $this->compare(User::groupBy('title'));
+    }
+}