Create phpcs static check for DiConfigTest

Magento2/Sniffs/Legacy/DiConfigSniff.php

@@ -0,0 +1,80 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+namespace Magento2\Sniffs\Legacy;
+
+use DOMDocument;
+use PHP_CodeSniffer\Files\File;
+use PHP_CodeSniffer\Sniffs\Sniff;
+
+class DiConfigSniff implements Sniff
+{
+    private const WARNING_CODE = 'FoundObsoleteAttribute';
+    private const ERROR_CODE = 'WrongXML';
+
+    private $xpathObsoleteElems = [
+        'param',
+        'instance',
+        'array',
+        'item[@key]',
+        'value'
+    ];
+
+    private $messages = [
+        'param' => 'The <param> node is obsolete. Instead, use the <argument name="..." xsi:type="...">',
+        'instance' => 'The <instance> node is obsolete. Instead, use the <argument name="..." xsi:type="object">',
+        'array' => 'The <array> node is obsolete. Instead, use the <argument name="..." xsi:type="array">',
+        'item[@key]' => 'The <item key="..."> node is obsolete. Instead, use the <item name="..." xsi:type="...">',
+        'value' => 'The <value> node is obsolete. Instead, provide the actual value as a text literal.'
+    ];
+
+    public function register(): array
+    {
+        return [
+            T_INLINE_HTML
+        ];
+    }
+
+    public function process(File $phpcsFile, $stackPtr): int
+    {
+        $xml = simplexml_load_string($this->getFormattedXML($phpcsFile));
+        if ($xml === false) {
+            $phpcsFile->addError(
+                sprintf(
+                    "Couldn't parse contents of '%s', check that they are in valid XML format",
+                    $phpcsFile->getFilename(),
+                ),
+                $stackPtr,
+                self::ERROR_CODE
+            );
+        }
+
+        foreach ($this->xpathObsoleteElems as $obsoleteElem) {
+            $found = $xml->xpath($obsoleteElem);
+            if ($found === true) {
+                $phpcsFile->addWarning(
+                    $this->messages[$obsoleteElem],
+                    $stackPtr,
+                    self::WARNING_CODE
+                );
+            }
+        }
+    }
+
+    /**
+     * Format the incoming XML to avoid tags split into several lines.
+     *
+     * @param File $phpcsFile
+     * @return false|string
+     */
+    private function getFormattedXML(File $phpcsFile)
+    {
+        $doc = new DomDocument('1.0');
+        $doc->formatOutput = true;
+        $doc->loadXML($phpcsFile->getTokensAsString(0, 999999));
+        return $doc->saveXML();
+    }
+}

Magento2/Tests/Legacy/DiConfigUnitTest.php

@@ -0,0 +1,34 @@
+<?php
+/**
+ * Copyright © Magento. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento2\Tests\Legacy;
+
+use PHP_CodeSniffer\Tests\Standards\AbstractSniffUnitTest;
+
+class DiConfigUnitTest extends AbstractSniffUnitTest
+{
+    /**
+     * @inheritdoc
+     */
+    public function getErrorList(): array
+    {
+        return [];
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getWarningList(): array
+    {
+        return [
+            9 => 1,
+            10 => 1,
+            11 => 1,
+            12 => 1,
+            13 => 1,
+            15 => 1
+        ];
+    }
+}

Magento2/Tests/Legacy/DiConfigUnitTest.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<root>
+    <instance>
+        <param name="param1" new_attribute="2">
+            <array key="amounts">
+                <item key="item1" new_attribute="3">
+                    <value new_attribute="4">scalar20</value>
+                </item>
+                <item>50.00</item>
+            </array>
+        </param>
+    </instance>
+</root>

Magento2/ruleset.xml

@@ -223,6 +223,11 @@
         <severity>8</severity>
         <type>warning</type>
     </rule>
+    <rule ref="Magento2.Legacy.DiConfig">
+        <severity>8</severity>
+        <type>warning</type>
+        <include-pattern>*\/DiConfigUnitTest.xml$</include-pattern>
+    </rule>
 
     <!-- Severity 7 warnings: General code issues. -->
     <rule ref="Generic.Arrays.DisallowLongArraySyntax">

composer.json

@@ -10,7 +10,9 @@
     "require": {
         "php": ">=7.3",
         "squizlabs/php_codesniffer": "^3.6",
-        "webonyx/graphql-php": "^14.9"
+        "webonyx/graphql-php": "^14.9",
+        "ext-simplexml": "*",
+        "ext-dom": "*"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.5.8"