#24781: Update integration test

Author: ihor-sviziev

dev/tests/integration/testsuite/Magento/Elasticsearch6/SearchAdapter/ConnectionManagerTest.php

@@ -32,13 +32,28 @@ protected function setUp()
         $this->connectionManager = $this->objectManager->create(ConnectionManager::class);
     }
 
+    /**
+     * Test if 'elasticsearch5' search engine returned by connection manager.
+     *
+     * @magentoAppIsolation enabled
+     * @magentoConfigFixture default/catalog/search/engine elasticsearch5
+     */
+    public function testCorrectElasticsearchClientEs5()
+    {
+        $connection = $this->connectionManager->getConnection();
+        $this->assertInstanceOf(
+            \Magento\Elasticsearch\Elasticsearch5\Model\Client\Elasticsearch::class,
+            $connection
+        );
+    }
+
     /**
      * Test if 'elasticsearch6' search engine returned by connection manager.
      *
      * @magentoAppIsolation enabled
      * @magentoConfigFixture default/catalog/search/engine elasticsearch6
      */
-    public function testCorrectElasticsearchClient()
+    public function testCorrectElasticsearchClientEs6()
     {
         $connection = $this->connectionManager->getConnection();
         $this->assertInstanceOf(