#27504 fix joinprocessor behavior with consecutive calls

dev/tests/integration/testsuite/Magento/Framework/Api/SearchCriteria/CollectionProcessor/JoinProcessorTest.php

@@ -0,0 +1,66 @@
+<?php
+/**
+ * Copyright 2023 Adobe
+ * All Rights Reserved.
+ */
+declare(strict_types=1);
+
+namespace Magento\Framework\Api\SearchCriteria\CollectionProcessor;
+
+use Magento\Framework\Api\SearchCriteria\CollectionProcessor\JoinProcessor\CustomJoinInterface;
+use Magento\Framework\Api\SearchCriteriaBuilder;
+use Magento\Framework\Data\Collection\AbstractDb;
+use Magento\Framework\ObjectManagerInterface;
+use Magento\TestFramework\Helper\Bootstrap;
+use PHPUnit\Framework\TestCase;
+
+class JoinProcessorTest extends TestCase
+{
+ /**
+ * @var ObjectManagerInterface
+ */
+ private $objectManager;
+
+ protected function setUp(): void
+ {
+ $this->objectManager = Bootstrap::getObjectManager();
+ }
+
+ /**
+ * Test proper application of the join processor for consecutive calls with different collections.
+ *
+ * @return void
+ */
+ public function testMultipleCollections(): void
+ {
+ $customJoinMock = $this->getMockBuilder(CustomJoinInterface::class)
+ ->getMock();
+
+ $customJoinMock->expects($this->exactly(2))
+ ->method('apply');
+
+ $joinProcessor = $this->objectManager->create(JoinProcessor::class, [
+ 'customJoins' => [
+ 'test_join' => $customJoinMock,
+ ],
+ 'fieldMapping' => [
+ 'test_field' => 'test_join',
+ ],
+ ]);
+
+ $searchCriteria = $this->objectManager->create(SearchCriteriaBuilder::class)
+ ->addFilter('test_field', 'test')
+ ->create();
+
+ $collection1 = $this->getMockBuilder(AbstractDb::class)
+ ->disableOriginalConstructor()
+ ->getMock();
+
+ $collection2 = $this->getMockBuilder(AbstractDb::class)
+ ->disableOriginalConstructor()
+ ->getMock();
+
+ $joinProcessor->process($searchCriteria, $collection1);
+ $joinProcessor->process($searchCriteria, $collection2);
+ }
+}

lib/internal/Magento/Framework/Api/SearchCriteria/CollectionProcessor/JoinProcessor.php

@@ -1,7 +1,7 @@
 <?php
 /**
- * Copyright © Magento, Inc. All rights reserved.
- * See COPYING.txt for license details.
+ * Copyright 2016 Adobe
+ * All Rights Reserved.
  */
 namespace Magento\Framework\Api\SearchCriteria\CollectionProcessor;
 
@@ -72,6 +72,8 @@ public function process(SearchCriteriaInterface $searchCriteria, AbstractDb $col
  }
  }
  }
+
+ $this->appliedFields = [];
  }
 
  /**