MAGETWO-90241: Image Uploader maxFileSize configuration can exceed PHP's upload_max_filesize

Add ImageTest coverage for maxFileSize fix

Author: danmooney2

app/code/Magento/Ui/Test/Unit/Component/Form/Element/DataType/Media/ImageTest.php

@@ -0,0 +1,127 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+declare(strict_types=1);
+
+namespace Magento\Ui\Test\Unit\Component\Form\Element\DataType\Media;
+
+use Magento\Ui\Component\Form\Element\DataType\Media\Image;
+use Magento\Store\Model\StoreManagerInterface;
+use Magento\Store\Api\Data\StoreInterface;
+use Magento\Framework\File\Size;
+use Magento\Framework\TestFramework\Unit\Helper\ObjectManager;
+
+class ImageTest extends \Magento\Ui\Test\Unit\Component\Form\Element\DataType\MediaTest
+{
+    /**
+     * @var StoreInterface|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $store;
+
+    /**
+     * @var StoreManagerInterface|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $storeManager;
+
+    /**
+     * @var Size|\PHPUnit_Framework_MockObject_MockObject
+     */
+    private $fileSize;
+
+    /**
+     * @var ObjectManager
+     */
+    private $objectManager;
+
+    /**
+     * @var Image
+     */
+    private $image;
+
+    public function setUp()
+    {
+        parent::setUp();
+
+        $this->processor = $this->getMockBuilder(\Magento\Framework\View\Element\UiComponent\Processor::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $this->context->expects($this->atLeastOnce())->method('getProcessor')->willReturn($this->processor);
+
+        $this->storeManager = $this->getMockForAbstractClass(StoreManagerInterface::class);
+
+        $this->store = $this->getMockBuilder(StoreInterface::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+
+        $this->store->expects($this->any())->method('getId')->willReturn(0);
+
+        $this->storeManager->expects($this->any())->method('getStore')->willReturn($this->store);
+
+        $this->fileSize = $this->getMockBuilder(Size::class)->getMock();
+
+        $this->objectManager = new ObjectManager($this);
+
+        $this->image = $this->objectManager->getObject(Image::class, [
+            'context' => $this->context,
+            'storeManager' => $this->storeManager,
+            'fileSize' => $this->fileSize
+        ]);
+
+        $this->image->setData([
+            'config' => [
+                'initialMediaGalleryOpenSubpath' => 'open/sesame',
+            ],
+        ]);
+    }
+
+    /**
+     * @dataProvider prepareDataProvider
+     */
+    public function testPrepare()
+    {
+        $this->assertExpectedPreparedConfiguration(...func_get_args());
+    }
+
+    /**
+     * Data provider for testPrepare
+     * @return array
+     */
+    public function prepareDataProvider(): array
+    {
+        return [
+            [['maxFileSize' => 10], 10, ['maxFileSize' => 10]],
+            [['maxFileSize' => null], 10, ['maxFileSize' => 10]],
+            [['maxFileSize' => 10], 5, ['maxFileSize' => 5]],
+            [['maxFileSize' => 10], 20, ['maxFileSize' => 10]],
+            [['maxFileSize' => 0], 10, ['maxFileSize' => 10]],
+        ];
+    }
+
+    /**
+     * @param array $initialConfig
+     * @param int $maxFileSizeSupported
+     * @param array $expectedPreparedConfig
+     */
+    private function assertExpectedPreparedConfiguration(
+        array $initialConfig,
+        int $maxFileSizeSupported,
+        array $expectedPreparedConfig
+    ) {
+        $this->image->setData(array_merge_recursive(['config' => $initialConfig], $this->image->getData()));
+
+        $this->fileSize->expects($this->any())->method('getMaxFileSize')->willReturn($maxFileSizeSupported);
+
+        $this->image->prepare();
+
+        $actualRelevantPreparedConfig = array_intersect_key($this->image->getConfiguration(), $initialConfig);
+
+        $this->assertEquals(
+            $expectedPreparedConfig,
+            $actualRelevantPreparedConfig
+        );
+    }
+}