entt/test/lib/registry_plugin/main.cpp

#define CR_HOST

#include <cr.h>
#include <gtest/gtest.h>
#include <entt/core/type_info.hpp>
#include <entt/entity/registry.hpp>
#include "types.h"

template<typename Type>
struct entt::type_index<Type> {};

TEST(Lib, Registry) {
    entt::registry registry;

    for(auto i = 0; i < 3; ++i) {
        const auto entity = registry.create();
        registry.assign<position>(entity, i, i);

        if(i % 2) {
            registry.assign<tag>(entity);
        }
    }

    cr_plugin ctx;
    ctx.userdata = &registry;
    cr_plugin_load(ctx, PLUGIN);
    cr_plugin_update(ctx);

    ASSERT_EQ(registry.size<position>(), registry.size<velocity>());
    ASSERT_NE(registry.size<position>(), registry.size());
    ASSERT_TRUE(registry.empty<tag>());

    registry.view<position>().each([](auto entity, auto &position) {
        ASSERT_EQ(position.x, entt::to_integral(entity) + 16);
        ASSERT_EQ(position.y, entt::to_integral(entity) + 16);
    });

    registry = {};
    cr_plugin_close(ctx);
}