ENGCOM-7142: Static properties serialization fix. #26175

 - Merge Pull Request #26175 from p-bystritsky/magento2:static_properties_serialization_fix
 - Merged commits:
   1. 9383fe1
   2. 3343d81
   3. 7388d8c
   4. 6bf711b
   5. edfaf7c
   6. c6244ea
   7. 3b7f758
   8. 37b852d
   9. 9210192

Author: magento-engcom-team

dev/tests/integration/framework/Magento/TestFramework/Serialize/Serializer.php

@@ -0,0 +1,52 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+declare(strict_types=1);
+
+namespace Magento\TestFramework\Serialize;
+
+use Magento\Framework\Serialize\SerializerInterface;
+
+/**
+ * Insecure SerializerInterface implementation for test use only.
+ */
+class Serializer implements SerializerInterface
+{
+    /**
+     * @inheritDoc
+     */
+    public function serialize($data)
+    {
+        if (is_resource($data)) {
+            throw new \InvalidArgumentException('Unable to serialize value.');
+        }
+
+        // phpcs:ignore Magento2.Security.InsecureFunction
+        return serialize($data);
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function unserialize($string)
+    {
+        if (false === $string || null === $string || '' === $string) {
+            throw new \InvalidArgumentException('Unable to unserialize value.');
+        }
+        set_error_handler(
+            function () {
+                restore_error_handler();
+                throw new \InvalidArgumentException('Unable to unserialize value, string is corrupted.');
+            },
+            E_NOTICE
+        );
+        // phpcs:ignore Magento2.Security.InsecureFunction
+        $result = unserialize($string);
+        restore_error_handler();
+
+        return $result;
+    }
+}

dev/tests/integration/framework/Magento/TestFramework/Workaround/Cleanup/StaticProperties.php

@@ -170,7 +170,7 @@ public static function backupStaticVariables()
 
         $objectManager = Bootstrap::getInstance()->getObjectManager();
         $cache = $objectManager->get(CacheInterface::class);
-        $serializer = $objectManager->get(SerializerInterface::class);
+        $serializer = $objectManager->get(\Magento\TestFramework\Serialize\Serializer::class);
         $cachedProperties = $cache->load(self::CACHE_NAME);
 
         if ($cachedProperties) {
@@ -187,9 +187,10 @@ public static function backupStaticVariables()
                 | Files::INCLUDE_TESTS
             ),
             function ($classFile) {
-                return StaticProperties::_isClassInCleanableFolders($classFile)
-                // phpcs:ignore Magento2.Functions.DiscouragedFunction
-                && strpos(file_get_contents($classFile), ' static ')  > 0;
+                return strpos($classFile, 'TestFramework')  === -1
+                    && StaticProperties::_isClassInCleanableFolders($classFile)
+                    // phpcs:ignore Magento2.Functions.DiscouragedFunction
+                    && strpos(file_get_contents($classFile), ' static ')  > 0;
             }
         );
         $namespacePattern = '/namespace [a-zA-Z0-9\\\\]+;/';