Issue #3075831 by mr.baileys: Failing assertions when bundle ID contains only numbers

core/modules/jsonapi/src/ResourceType/ResourceTypeRepository.php

@@ -102,7 +102,7 @@ public function all() {
       $resource_types = [];
       foreach ($this->entityTypeManager->getDefinitions() as $entity_type) {
         $resource_types = array_merge($resource_types, array_map(function ($bundle) use ($entity_type) {
-          return $this->createResourceType($entity_type, $bundle);
+          return $this->createResourceType($entity_type, (string) $bundle);
         }, array_keys($this->entityTypeBundleInfo->getBundleInfo($entity_type->id()))));
       }
       foreach ($resource_types as $resource_type) {

core/modules/jsonapi/tests/src/Kernel/ResourceType/ResourceTypeRepositoryTest.php

@@ -51,6 +51,9 @@ protected function setUp() {
     NodeType::create([
       'type' => 'page',
     ])->save();
+    NodeType::create([
+      'type' => '42',
+    ])->save();
 
     $this->resourceTypeRepository = $this->container->get('jsonapi.resource_type.repository');
   }
@@ -92,6 +95,7 @@ public function testGet($entity_type_id, $bundle, $entity_class) {
   public function getProvider() {
     return [
       ['node', 'article', 'Drupal\node\Entity\Node'],
+      ['node', '42', 'Drupal\node\Entity\Node'],
       ['node_type', 'node_type', 'Drupal\node\Entity\NodeType'],
       ['menu', 'menu', 'Drupal\system\Entity\Menu'],
     ];