Fixes #16558: Added cloning yii\data\ActiveDataProvider::query property when ActiveDataProvider object is cloned

tests/framework/data/ActiveDataProviderCloningTest.php

@@ -0,0 +1,34 @@
+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yiiunit\framework\data;
+
+use yii\data\ActiveDataProvider;
+use yii\db\Query;
+use yiiunit\TestCase;
+
+class ActiveDataProviderCloningTest extends TestCase
+{
+
+    // Tests :
+
+    public function testClone()
+    {
+        $queryFirst = new Query();
+        
+        $dataProviderFirst = new ActiveDataProvider([
+            'query' => $queryFirst
+        ]);
+        
+        $dataProviderSecond = clone $dataProviderFirst;
+        
+        $querySecond = $dataProviderSecond->query;
+        
+        $this->assertNotSame($querySecond, $queryFirst);
+    }
+}
+