MAGETWO-98409: Config:set command failed for path bigger than 3 depth

Author: dhorytskyi

dev/tests/integration/testsuite/Magento/Config/Console/Command/ConfigSetCommandTest.php

@@ -7,6 +7,8 @@
 namespace Magento\Config\Console\Command;
 
 use Magento\Config\Model\Config\Backend\Admin\Custom;
+use Magento\Config\Model\Config\Structure\Converter;
+use Magento\Config\Model\Config\Structure\Data as StructureData;
 use Magento\Directory\Model\Currency;
 use Magento\Framework\App\Config\ConfigPathResolver;
 use Magento\Framework\App\Config\ScopeConfigInterface;
@@ -91,6 +93,8 @@ protected function setUp()
     {
         Bootstrap::getInstance()->reinitialize();
         $this->objectManager = Bootstrap::getObjectManager();
+        $this->extendSystemStructure();
+
         $this->scopeConfig = $this->objectManager->get(ScopeConfigInterface::class);
         $this->reader = $this->objectManager->get(FileReader::class);
         $this->filesystem = $this->objectManager->get(Filesystem::class);
@@ -123,6 +127,21 @@ protected function tearDown()
         $this->appConfig->reinit();
     }
 
+    /**
+     * Add test system structure to main system structure
+     *
+     * @return void
+     */
+    private function extendSystemStructure()
+    {
+        $document = new \DOMDocument();
+        $document->load(__DIR__ . '/../../_files/system.xml');
+        $converter = $this->objectManager->get(Converter::class);
+        $systemConfig = $converter->convert($document);
+        $structureData = $this->objectManager->get(StructureData::class);
+        $structureData->merge($systemConfig);
+    }
+
     /**
      * @return array
      */
@@ -191,6 +210,8 @@ public function runLockDataProvider()
             ['general/region/display_all', '1'],
             ['general/region/state_required', 'BR,FR', ScopeInterface::SCOPE_WEBSITE, 'base'],
             ['admin/security/use_form_key', '0'],
+            ['general/group/subgroup/field', 'default_value'],
+            ['general/group/subgroup/field', 'website_value', ScopeInterface::SCOPE_WEBSITE, 'base'],
         ];
     }
 

dev/tests/integration/testsuite/Magento/Config/_files/system.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Config:etc/system_file.xsd">
+    <system>
+        <section id="general">
+            <group id="group">
+                <group id="subgroup">
+                    <field id="field" translate="label" type="text" sortOrder="100" showInDefault="1" showInWebsite="1" showInStore="0">
+                        <label>Label</label>
+                    </field>
+                </group>
+            </group>
+        </section>
+    </system>
+</config>