ENGCOM-6986: Unit test for \Magento\MediaGallery\Plugin\Product\Gallery\Processor #27021

 - Merge Pull Request #27021 from karyna-tsymbal-atwix/magento2:unit-test-magento-mediagallery-plugin-product-gallery-processor
 - Merged commits:
   1. 73c66d9

Author: magento-engcom-team

app/code/Magento/MediaGallery/Test/Unit/Plugin/Product/Gallery/ProcessorTest.php

@@ -0,0 +1,133 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+declare(strict_types=1);
+
+namespace Magento\MediaGallery\Test\Unit\Plugin\Product\Gallery;
+
+use Magento\Catalog\Model\Product;
+use Magento\Catalog\Model\Product\Gallery\Processor as ProcessorSubject;
+use Magento\Framework\TestFramework\Unit\Helper\ObjectManager as ObjectManagerHelper;
+use Magento\MediaGallery\Plugin\Product\Gallery\Processor;
+use Magento\MediaGalleryApi\Model\Asset\Command\DeleteByPathInterface;
+use PHPUnit\Framework\MockObject\MockObject;
+use PHPUnit\Framework\TestCase;
+use Psr\Log\LoggerInterface;
+
+/**
+ * Unit test for \Magento\MediaGallery\Plugin\Product\Gallery\Processor
+ */
+class ProcessorTest extends TestCase
+{
+    private const STUB_FILE_NAME = 'file';
+
+    /**
+     * @var DeleteByPathInterface|MockObject
+     */
+    private $deleteMediaAssetByPathMock;
+
+    /**
+     * @var LoggerInterface|MockObject
+     */
+    private $loggerMock;
+
+    /**
+     * @var ProcessorSubject|MockObject
+     */
+    private $processorSubjectMock;
+
+    /**
+     * @var Product|MockObject
+     */
+    private $productMock;
+
+    /**
+     * @var Processor
+     */
+    private $plugin;
+
+    /**
+     * @inheritDoc
+     */
+    protected function setUp()
+    {
+        $this->processorSubjectMock = $this->createMock(ProcessorSubject::class);
+        $this->productMock = $this->createMock(Product::class);
+
+        $this->deleteMediaAssetByPathMock = $this->getMockBuilder(DeleteByPathInterface::class)
+            ->disableOriginalConstructor()
+            ->setMethods(['execute'])
+            ->getMockForAbstractClass();
+        $this->loggerMock = $this->getMockBuilder(LoggerInterface::class)
+            ->disableOriginalConstructor()
+            ->setMethods(['critical'])
+            ->getMockForAbstractClass();
+
+        $this->plugin = (new ObjectManagerHelper($this))->getObject(
+            Processor::class,
+            [
+                'deleteMediaAssetByPath' => $this->deleteMediaAssetByPathMock,
+                'logger' => $this->loggerMock
+            ]
+        );
+    }
+
+    /**
+     * Successful test case.
+     */
+    public function testAfterRemoveImageExpectsExecuteCalled()
+    {
+        $this->deleteMediaAssetByPathMock->expects($this->once())
+            ->method('execute')
+            ->with(self::STUB_FILE_NAME);
+        $this->loggerMock->expects($this->never())->method('critical');
+
+        $actualResult = $this->plugin->afterRemoveImage(
+            $this->processorSubjectMock,
+            $this->processorSubjectMock,
+            $this->productMock,
+            self::STUB_FILE_NAME
+        );
+        $this->assertSame($this->processorSubjectMock, $actualResult);
+    }
+
+    /**
+     * Test case when passed File argument is not a string.
+     */
+    public function testAfterRemoveImageWithIncorrectFile()
+    {
+        $this->deleteMediaAssetByPathMock->expects($this->never())->method('execute');
+        $this->loggerMock->expects($this->never())->method('critical');
+
+        $actualResult = $this->plugin->afterRemoveImage(
+            $this->processorSubjectMock,
+            $this->processorSubjectMock,
+            $this->productMock,
+            ['non-string-argument' => self::STUB_FILE_NAME]
+        );
+        $this->assertSame($this->processorSubjectMock, $actualResult);
+    }
+
+    /**
+     * Test case when an Exception is thrown.
+     */
+    public function testAfterRemoveImageExpectsExecuteWillThrowException()
+    {
+        $this->deleteMediaAssetByPathMock->expects($this->once())
+            ->method('execute')
+            ->with(self::STUB_FILE_NAME)
+            ->willThrowException(new \Exception('Some Exception'));
+        $this->loggerMock->expects($this->once())->method('critical');
+
+        $actualResult = $this->plugin->afterRemoveImage(
+            $this->processorSubjectMock,
+            $this->processorSubjectMock,
+            $this->productMock,
+            self::STUB_FILE_NAME
+        );
+        $this->assertSame($this->processorSubjectMock, $actualResult);
+    }
+}