AC-7422:Incompatible issues fix for PHP8.2 - updated core graphql compatibility with the updated webonyx/graphql-php v15.x

Author: faizan-shk

dev/tests/integration/testsuite/Magento/Framework/GraphQl/Config/GraphQlReaderTest.php

@@ -194,11 +194,7 @@ enumValues(includeDeprecated: true) {
         $response = $this->graphQlController->dispatch($request);
         $output = $this->jsonSerializer->unserialize($response->getContent());
         $expectedOutput = require __DIR__ . '/../_files/schema_response_sdl_description.php';
-
         $schemaResponseFields = $output['data']['__schema']['types'];
-        $schemaResponseFieldsFirstHalf = array_slice($schemaResponseFields, 0, 25);
-        $schemaResponseFieldsSecondHalf = array_slice($schemaResponseFields, -21, 21);
-        $mergedSchemaResponseFields = array_merge($schemaResponseFieldsFirstHalf, $schemaResponseFieldsSecondHalf);
 
         foreach ($expectedOutput as $searchTerm) {
             $sortFields = ['inputFields', 'fields'];
@@ -215,7 +211,7 @@ function ($a, $b) {
             }
 
             $this->assertTrue(
-                (in_array($searchTerm, $mergedSchemaResponseFields)),
+                (in_array($searchTerm, $schemaResponseFields)),
                 'Missing type in the response'
             );
         }

lib/internal/Magento/Framework/GraphQl/Schema/Type/Enum/Enum.php

@@ -24,6 +24,11 @@ public function __construct(EnumElement $configElement)
             'name' => $configElement->getName(),
             'description' => $configElement->getDescription()
         ];
+
+        if (empty($configElement->getValues())) {
+            $config['values'] = [];
+        }
+
         foreach ($configElement->getValues() as $value) {
             $config['values'][$value->getValue()] = [
                 'value' => $value->getValue(),