test: use shared custom_entity type

test/entt/entity/registry.cpp

@@ -15,6 +15,7 @@
 #include <entt/entity/registry.hpp>
 #include "../common/aggregate.h"
 #include "../common/config.h"
+#include "../common/custom_entity.h"
 #include "../common/empty.h"
 #include "../common/non_default_constructible.h"
 #include "../common/pointer_stable.h"
@@ -73,10 +74,8 @@ private:
     bool *ctx_check{};
 };
 
-enum class small_entity : std::uint32_t {};
-
-struct small_entity_traits {
-    using value_type = small_entity;
+struct custom_entity_traits {
+    using value_type = test::custom_entity;
     using entity_type = uint32_t;
     using version_type = uint16_t;
     static constexpr entity_type entity_mask = 0xFF;
@@ -84,8 +83,7 @@ struct small_entity_traits {
 };
 
 template<>
-struct entt::entt_traits<small_entity>: entt::basic_entt_traits<small_entity_traits> {
-    using base_type = entt::basic_entt_traits<small_entity_traits>;
+struct entt::entt_traits<test::custom_entity>: entt::basic_entt_traits<custom_entity_traits> {
     static constexpr auto page_size = ENTT_SPARSE_PAGE;
 };
 
@@ -625,8 +623,8 @@ TEST(Registry, CreateDestroyReleaseCornerCase) {
 }
 
 ENTT_DEBUG_TEST(RegistryDeathTest, CreateTooManyEntities) {
-    entt::basic_registry<small_entity> registry;
-    std::vector<small_entity> entity(entt::entt_traits<small_entity>::to_entity(entt::null));
+    entt::basic_registry<test::custom_entity> registry;
+    std::vector<test::custom_entity> entity(entt::entt_traits<test::custom_entity>::to_entity(entt::null));
     registry.create(entity.begin(), entity.end());
 
     ASSERT_DEATH([[maybe_unused]] const auto entt = registry.create(), "");