test: rework lib stuff to share common files

test/lib/registry/plugin/main.cpp

@@ -0,0 +1,31 @@
+#define CR_HOST
+
+#include <gtest/gtest.h>
+#include <cr.h>
+#include <entt/entity/registry.hpp>
+#include "types.h"
+
+TEST(Lib, Registry) {
+    entt::registry registry;
+
+    for(auto i = 0; i < 3; ++i) {
+        registry.emplace<position>(registry.create(), i, i);
+    }
+
+    cr_plugin ctx;
+    cr_plugin_load(ctx, PLUGIN);
+
+    ctx.userdata = &registry;
+    cr_plugin_update(ctx);
+
+    ASSERT_EQ(registry.storage<position>().size(), registry.storage<velocity>().size());
+    ASSERT_EQ(registry.storage<position>().size(), registry.size());
+
+    registry.view<position>().each([](auto entity, auto &position) {
+        ASSERT_EQ(position.x, static_cast<int>(entt::to_integral(entity) + 16u));
+        ASSERT_EQ(position.y, static_cast<int>(entt::to_integral(entity) + 16u));
+    });
+
+    registry = {};
+    cr_plugin_close(ctx);
+}