Adding graphql_file_validate with subscriber.

Author: apathak18

tests/modules/graphql_file_validate/graphql_file_validate.info.yml

@@ -0,0 +1,5 @@
+type: module
+name: GraphQL File Validate Test
+description: Tests file validate on uploads.
+package: Testing
+hidden: TRUE

tests/modules/graphql_file_validate/graphql_file_validate.module

@@ -0,0 +1,17 @@
+<?php
+
+/**
+ * @file
+ * Test module for file validation.
+ */
+
+use Drupal\file\FileInterface;
+
+/**
+ * Test to validate file exists.
+ */
+function graphql_file_validate(FileInterface $file): void {
+  if (!file_exists($file->getFileUri())) {
+    throw new \Exception('File does not exist during validation: ' . $file->getFileUri());
+  }
+}

tests/modules/graphql_file_validate/graphql_file_validate.services.yml

@@ -0,0 +1,5 @@
+services:
+  graphql_file_validate_test_subscriber:
+    class: Drupal\graphql_file_validate\EventSubscriber\GraphqlFileValidationTestSubscriber
+    tags:
+      - { name: event_subscriber }

tests/modules/graphql_file_validate/src/EventSubscriber/GraphqlFileValidationTestSubscriber.php

@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\graphql_file_validate\EventSubscriber;
+
+use Drupal\file\Validation\FileValidationEvent;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+
+/**
+ * Provides a file validation listener for graphql file validate test.
+ */
+class GraphqlFileValidationTestSubscriber implements EventSubscriberInterface {
+
+  /**
+   * Handles the file validation event.
+   *
+   * @param \Drupal\file\Validation\FileValidationEvent $event
+   *   The event.
+   */
+  public function onFileValidation(FileValidationEvent $event): void {
+    graphql_file_validate('validate', [$event->file->id()]);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function getSubscribedEvents(): array {
+    return [FileValidationEvent::class => 'onFileValidation'];
+  }
+
+}

tests/src/Kernel/Framework/UploadFileServiceTest.php

@@ -18,7 +18,7 @@ class UploadFileServiceTest extends GraphQLTestBase {
   /**
    * {@inheritdoc}
    */
-  protected static $modules = ['file_validator_test'];
+  protected static $modules = ['graphql_file_validate'];
 
   /**
    * The FileUpload object we want to test, gets prepared in setUp().