test: code coverage

test/CMakeLists.txt

@@ -168,6 +168,7 @@ SETUP_BASIC_TEST(enum entt/core/enum.cpp)
 SETUP_BASIC_TEST(family entt/core/family.cpp)
 SETUP_BASIC_TEST(hashed_string entt/core/hashed_string.cpp)
 SETUP_BASIC_TEST(ident entt/core/ident.cpp)
+SETUP_BASIC_TEST(memory entt/core/memory.cpp)
 SETUP_BASIC_TEST(monostate entt/core/monostate.cpp)
 SETUP_BASIC_TEST(type_info entt/core/type_info.cpp)
 SETUP_BASIC_TEST(type_traits entt/core/type_traits.cpp)

test/entt/core/memory.cpp

@@ -0,0 +1,11 @@
+#include <memory>
+#include <gtest/gtest.h>
+#include <entt/core/memory.hpp>
+
+TEST(Memory, Unfancy) {
+    std::shared_ptr<int> shared = std::make_shared<int>();
+    auto *plain = std::addressof(*shared);
+
+    ASSERT_EQ(entt::unfancy(shared), plain);
+    ASSERT_EQ(entt::unfancy(plain), plain);
+}