initial

external/entt/test/lib/registry/shared/lib.cpp

@@ -0,0 +1,22 @@
+#include <entt/core/attribute.h>
+#include <entt/entity/mixin.hpp>
+#include <entt/entity/registry.hpp>
+#include <entt/entity/view.hpp>
+#include "../../../common/boxed_type.h"
+#include "../../../common/empty.h"
+
+template class entt::basic_registry<entt::entity>;
+
+ENTT_API void update(entt::registry &registry, int value) {
+    registry.view<test::boxed_int, test::empty>().each([value](auto &elem) {
+        elem.value += value;
+    });
+}
+
+ENTT_API void insert(entt::registry &registry) {
+    // forces the creation of the pool for the empty type
+    static_cast<void>(registry.storage<test::empty>());
+
+    const auto view = registry.view<test::boxed_int>();
+    registry.insert<test::empty>(view.begin(), view.end());
+}

external/entt/test/lib/registry/shared/main.cpp

@@ -0,0 +1,30 @@
+#include <gtest/gtest.h>
+#include <entt/core/attribute.h>
+#include <entt/entity/entity.hpp>
+#include <entt/entity/mixin.hpp>
+#include <entt/entity/registry.hpp>
+#include <entt/entity/view.hpp>
+#include "../../../common/boxed_type.h"
+#include "../../../common/empty.h"
+
+ENTT_API void update(entt::registry &, int);
+ENTT_API void insert(entt::registry &);
+
+TEST(Lib, Registry) {
+    constexpr auto count = 3;
+    entt::registry registry;
+
+    for(auto i = 0; i < count; ++i) {
+        const auto entity = registry.create();
+        registry.emplace<test::boxed_int>(entity, i);
+    }
+
+    insert(registry);
+    update(registry, count);
+
+    ASSERT_EQ(registry.storage<test::boxed_int>().size(), registry.storage<test::empty>().size());
+
+    registry.view<test::boxed_int>().each([count](auto entity, auto &elem) {
+        ASSERT_EQ(elem.value, static_cast<int>(entt::to_integral(entity) + count));
+    });
+}