Unit test case fix

Author: Mohamed-Asar

app/code/Magento/Theme/Test/Unit/Controller/Result/AsyncCssPluginTest.php

@@ -1,13 +1,16 @@
 <?php
+
 /**
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+
 declare(strict_types=1);
 
 namespace Magento\Theme\Test\Unit\Controller\Result;
 
 use Magento\Theme\Controller\Result\AsyncCssPlugin;
+use Magento\Csp\Api\InlineUtilInterface;
 use Magento\Framework\App\Response\Http;
 use PHPUnit\Framework\TestCase;
 use PHPUnit\Framework\MockObject\MockObject;
@@ -38,9 +41,16 @@ class AsyncCssPluginTest extends TestCase
      */
     private $httpMock;
 
-    /** @var Layout|MockObject */
+    /**
+     * @var Layout|MockObject
+     */
     private $layoutMock;
 
+    /**
+     * @var InlineUtilInterface|MockObject
+     */
+    private $cspInlineUtilMock;
+
     /**
      * @inheritdoc
      */
@@ -53,12 +63,14 @@ protected function setUp(): void
 
         $this->httpMock = $this->createMock(Http::class);
         $this->layoutMock = $this->createMock(Layout::class);
+        $this->cspInlineUtilMock = $this->createMock(InlineUtilInterface::class);
 
         $objectManager = new ObjectManagerHelper($this);
         $this->plugin = $objectManager->getObject(
             AsyncCssPlugin::class,
             [
-                'scopeConfig' => $this->scopeConfigMock
+                'scopeConfig' => $this->scopeConfigMock,
+                'cspInlineUtil' => $this->cspInlineUtilMock
             ]
         );
     }
@@ -149,6 +161,14 @@ public function testAfterRenderResult(string $content, bool $isSetFlag, string $
             ->with(self::STUB_XML_PATH_USE_CSS_CRITICAL_PATH, ScopeInterface::SCOPE_STORE)
             ->willReturn($isSetFlag);
 
+        if ($isSetFlag) {
+            $this->cspInlineUtilMock->expects($this->any())
+                ->method('renderEventListener')
+                ->with(
+                    'onload',
+                    "this.onload=null;this.media='all'"
+                )->willReturn('onload="this.onload=null;this.media=\'all\'"');
+        }
         // Expects
         $this->httpMock->expects($this->any())
             ->method('setContent')