From 08d9cfe82c1ba1c5486401f8edac932a5eb6fe5d Mon Sep 17 00:00:00 2001
From: Michele Caini <michele.caini@gmail.com>
Date: Wed, 10 Jun 2020 17:37:21 +0200
Subject: [PATCH] test: added meta_func

---
 test/CMakeLists.txt          |   1 +
 test/entt/meta/meta.cpp      | 232 --------------------------
 test/entt/meta/meta_func.cpp | 312 +++++++++++++++++++++++++++++++++++
 3 files changed, 313 insertions(+), 232 deletions(-)
 create mode 100644 test/entt/meta/meta_func.cpp

diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index ee7da9cb3..3021949b8 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -183,6 +183,7 @@ SETUP_BASIC_TEST(meta_basic entt/meta/meta_basic.cpp)
 SETUP_BASIC_TEST(meta_conv entt/meta/meta_conv.cpp)
 SETUP_BASIC_TEST(meta_ctor entt/meta/meta_ctor.cpp)
 SETUP_BASIC_TEST(meta_data entt/meta/meta_data.cpp)
+SETUP_BASIC_TEST(meta_func entt/meta/meta_func.cpp)
 SETUP_BASIC_TEST(meta_prop entt/meta/meta_prop.cpp)
 
 list(APPEND TEST_META_SOURCES entt/meta/meta.cpp entt/meta/fixture.cpp)
diff --git a/test/entt/meta/meta.cpp b/test/entt/meta/meta.cpp
index 8257b0072..03f7ab41c 100644
--- a/test/entt/meta/meta.cpp
+++ b/test/entt/meta/meta.cpp
@@ -9,238 +9,6 @@
 #include <entt/meta/resolve.hpp>
 #include "fixture.h"
 
-TEST_F(Meta, MetaFunc) {
-    auto func = entt::resolve<func_type>().func("f2"_hs);
-    func_type instance{};
-
-    ASSERT_TRUE(func);
-    ASSERT_EQ(func.parent(), entt::resolve_id("func"_hs));
-    ASSERT_EQ(func.id(), "f2"_hs);
-    ASSERT_EQ(func.size(), 2u);
-    ASSERT_FALSE(func.is_const());
-    ASSERT_FALSE(func.is_static());
-    ASSERT_EQ(func.ret(), entt::resolve<int>());
-    ASSERT_EQ(func.arg(0u), entt::resolve<int>());
-    ASSERT_EQ(func.arg(1u), entt::resolve<int>());
-    ASSERT_FALSE(func.arg(2u));
-
-    auto any = func.invoke(instance, 3, 2);
-    auto empty = func.invoke(instance);
-
-    ASSERT_FALSE(empty);
-    ASSERT_TRUE(any);
-    ASSERT_EQ(any.type(), entt::resolve<int>());
-    ASSERT_EQ(any.cast<int>(), 4);
-    ASSERT_EQ(func_type::value, 3);
-
-    func.prop([](auto prop) {
-        ASSERT_EQ(prop.key(), props::prop_bool);
-        ASSERT_FALSE(prop.value().template cast<bool>());
-    });
-
-    ASSERT_FALSE(func.prop(props::prop_int));
-
-    auto prop = func.prop(props::prop_bool);
-
-    ASSERT_TRUE(prop);
-    ASSERT_EQ(prop.key(), props::prop_bool);
-    ASSERT_FALSE(prop.value().cast<bool>());
-}
-
-TEST_F(Meta, MetaFuncConst) {
-    auto func = entt::resolve<func_type>().func("f1"_hs);
-    func_type instance{};
-
-    ASSERT_TRUE(func);
-    ASSERT_EQ(func.parent(), entt::resolve_id("func"_hs));
-    ASSERT_EQ(func.id(), "f1"_hs);
-    ASSERT_EQ(func.size(), 1u);
-    ASSERT_TRUE(func.is_const());
-    ASSERT_FALSE(func.is_static());
-    ASSERT_EQ(func.ret(), entt::resolve<int>());
-    ASSERT_EQ(func.arg(0u), entt::resolve<int>());
-    ASSERT_FALSE(func.arg(1u));
-
-    auto any = func.invoke(instance, 4);
-    auto empty = func.invoke(instance, 'c');
-
-    ASSERT_FALSE(empty);
-    ASSERT_TRUE(any);
-    ASSERT_EQ(any.type(), entt::resolve<int>());
-    ASSERT_EQ(any.cast<int>(), 16);
-
-    func.prop([](auto prop) {
-        ASSERT_EQ(prop.key(), props::prop_bool);
-        ASSERT_FALSE(prop.value().template cast<bool>());
-    });
-
-    ASSERT_FALSE(func.prop(props::prop_int));
-
-    auto prop = func.prop(props::prop_bool);
-
-    ASSERT_TRUE(prop);
-    ASSERT_EQ(prop.key(), props::prop_bool);
-    ASSERT_FALSE(prop.value().cast<bool>());
-}
-
-TEST_F(Meta, MetaFuncRetVoid) {
-    auto func = entt::resolve<func_type>().func("g"_hs);
-    func_type instance{};
-
-    ASSERT_TRUE(func);
-    ASSERT_EQ(func.parent(), entt::resolve_id("func"_hs));
-    ASSERT_EQ(func.id(), "g"_hs);
-    ASSERT_EQ(func.size(), 1u);
-    ASSERT_FALSE(func.is_const());
-    ASSERT_FALSE(func.is_static());
-    ASSERT_EQ(func.ret(), entt::resolve<void>());
-    ASSERT_EQ(func.arg(0u), entt::resolve<int>());
-    ASSERT_FALSE(func.arg(1u));
-
-    auto any = func.invoke(instance, 5);
-
-    ASSERT_TRUE(any);
-    ASSERT_EQ(any.type(), entt::resolve<void>());
-    ASSERT_EQ(func_type::value, 25);
-
-    func.prop([](auto prop) {
-        ASSERT_EQ(prop.key(), props::prop_bool);
-        ASSERT_FALSE(prop.value().template cast<bool>());
-    });
-
-    ASSERT_FALSE(func.prop(props::prop_int));
-
-    auto prop = func.prop(props::prop_bool);
-
-    ASSERT_TRUE(prop);
-    ASSERT_EQ(prop.key(), props::prop_bool);
-    ASSERT_FALSE(prop.value().cast<bool>());
-}
-
-TEST_F(Meta, MetaFuncStatic) {
-    auto func = entt::resolve<func_type>().func("h"_hs);
-    func_type::value = 2;
-
-    ASSERT_TRUE(func);
-    ASSERT_EQ(func.parent(), entt::resolve_id("func"_hs));
-    ASSERT_EQ(func.id(), "h"_hs);
-    ASSERT_EQ(func.size(), 1u);
-    ASSERT_FALSE(func.is_const());
-    ASSERT_TRUE(func.is_static());
-    ASSERT_EQ(func.ret(), entt::resolve<int>());
-    ASSERT_EQ(func.arg(0u), entt::resolve<int>());
-    ASSERT_FALSE(func.arg(1u));
-
-    auto any = func.invoke({}, 3);
-    auto empty = func.invoke({}, 'c');
-
-    ASSERT_FALSE(empty);
-    ASSERT_TRUE(any);
-    ASSERT_EQ(any.type(), entt::resolve<int>());
-    ASSERT_EQ(any.cast<int>(), 6);
-
-    func.prop([](auto prop) {
-        ASSERT_EQ(prop.key(), props::prop_bool);
-        ASSERT_FALSE(prop.value().template cast<bool>());
-    });
-
-    ASSERT_FALSE(func.prop(props::prop_int));
-
-    auto prop = func.prop(props::prop_bool);
-
-    ASSERT_TRUE(prop);
-    ASSERT_EQ(prop.key(), props::prop_bool);
-    ASSERT_FALSE(prop.value().cast<bool>());
-}
-
-TEST_F(Meta, MetaFuncStaticRetVoid) {
-    auto func = entt::resolve<func_type>().func("k"_hs);
-
-    ASSERT_TRUE(func);
-    ASSERT_EQ(func.parent(), entt::resolve_id("func"_hs));
-    ASSERT_EQ(func.id(), "k"_hs);
-    ASSERT_EQ(func.size(), 1u);
-    ASSERT_FALSE(func.is_const());
-    ASSERT_TRUE(func.is_static());
-    ASSERT_EQ(func.ret(), entt::resolve<void>());
-    ASSERT_EQ(func.arg(0u), entt::resolve<int>());
-    ASSERT_FALSE(func.arg(1u));
-
-    auto any = func.invoke({}, 42);
-
-    ASSERT_TRUE(any);
-    ASSERT_EQ(any.type(), entt::resolve<void>());
-    ASSERT_EQ(func_type::value, 42);
-
-    func.prop([](auto prop) {
-        ASSERT_TRUE(prop);
-        ASSERT_EQ(prop.key(), props::prop_bool);
-        ASSERT_FALSE(prop.value().template cast<bool>());
-    });
-
-    ASSERT_FALSE(func.prop(props::prop_int));
-
-    auto prop = func.prop(props::prop_bool);
-
-    ASSERT_TRUE(prop);
-    ASSERT_EQ(prop.key(), props::prop_bool);
-    ASSERT_FALSE(prop.value().cast<bool>());
-}
-
-TEST_F(Meta, MetaFuncMetaAnyArgs) {
-    func_type instance;
-    auto any = entt::resolve<func_type>().func("f1"_hs).invoke(instance, 3);
-
-    ASSERT_TRUE(any);
-    ASSERT_EQ(any.type(), entt::resolve<int>());
-    ASSERT_EQ(any.cast<int>(), 9);
-}
-
-TEST_F(Meta, MetaFuncInvalidArgs) {
-    empty_type instance;
-
-    ASSERT_FALSE(entt::resolve<func_type>().func("f1"_hs).invoke(instance, 'c'));
-}
-
-TEST_F(Meta, MetaFuncCastAndConvert) {
-    func_type instance;
-    auto any = entt::resolve<func_type>().func("f3"_hs).invoke(instance, derived_type{}, 0, 3.);
-
-    ASSERT_TRUE(any);
-    ASSERT_EQ(any.type(), entt::resolve<int>());
-    ASSERT_EQ(any.cast<int>(), 9);
-}
-
-TEST_F(Meta, MetaFuncAsVoid) {
-    auto func = entt::resolve<func_type>().func("v"_hs);
-    func_type instance{};
-
-    ASSERT_EQ(func.invoke(instance, 42), entt::meta_any{std::in_place_type<void>});
-    ASSERT_EQ(func.ret(), entt::resolve<void>());
-    ASSERT_EQ(instance.value, 42);
-}
-
-TEST_F(Meta, MetaFuncAsAlias) {
-    func_type instance{};
-    auto func = entt::resolve<func_type>().func("a"_hs);
-    func.invoke(instance).cast<int>() = 3;
-
-    ASSERT_EQ(func.ret(), entt::resolve<int>());
-    ASSERT_EQ(instance.value, 3);
-}
-
-TEST_F(Meta, MetaFuncByReference) {
-    auto func = entt::resolve<func_type>().func("h"_hs);
-    func_type::value = 2;
-    entt::meta_any any{3};
-    int value = 4;
-
-    ASSERT_EQ(func.invoke({}, std::ref(value)).cast<int>(), 8);
-    ASSERT_EQ(func.invoke({}, *any).cast<int>(), 6);
-    ASSERT_EQ(any.cast<int>(), 6);
-    ASSERT_EQ(value, 8);
-}
-
 TEST_F(Meta, MetaType) {
     auto type = entt::resolve<derived_type>();
 
diff --git a/test/entt/meta/meta_func.cpp b/test/entt/meta/meta_func.cpp
new file mode 100644
index 000000000..7e40a628e
--- /dev/null
+++ b/test/entt/meta/meta_func.cpp
@@ -0,0 +1,312 @@
+#include <gtest/gtest.h>
+#include <entt/core/hashed_string.hpp>
+#include <entt/core/utility.hpp>
+#include <entt/meta/factory.hpp>
+#include <entt/meta/meta.hpp>
+#include <entt/meta/resolve.hpp>
+
+struct base_t {
+    virtual ~base_t() = default;
+    static void destroy(base_t &) {
+        ++counter;
+    }
+
+    inline static int counter = 0;
+};
+
+struct derived_t: base_t {};
+
+struct func_t {
+    int f(const base_t &, int a, int b) {
+        return f(a, b);
+    }
+
+    int f(int a, int b) {
+        value = a;
+        return b*b;
+    }
+
+    int f(int v) const {
+        return v*v;
+    }
+
+    void g(int v) {
+        value = v*v;
+    }
+
+    static int h(int &v) {
+        return (v *= value);
+    }
+
+    static void k(int v) {
+        value = v;
+    }
+
+    int v(int v) const {
+        return (value = v);
+    }
+
+    int & a() const {
+        return value;
+    }
+
+    inline static int value = 0;
+};
+
+struct Meta: ::testing::Test {
+    static void SetUpTestCase() {
+        entt::meta<double>().conv<int>();
+        entt::meta<base_t>().dtor<&base_t::destroy>();
+        entt::meta<derived_t>().base<base_t>().dtor<&derived_t::destroy>();
+
+        entt::meta<func_t>().type("func"_hs)
+                .func<entt::overload<int(const base_t &, int, int)>(&func_t::f)>("f3"_hs)
+                .func<entt::overload<int(int, int)>(&func_t::f)>("f2"_hs).prop(true, false)
+                .func<entt::overload<int(int) const>(&func_t::f)>("f1"_hs).prop(true, false)
+                .func<&func_t::g>("g"_hs).prop(true, false)
+                .func<&func_t::h>("h"_hs).prop(true, false)
+                .func<&func_t::k>("k"_hs).prop(true, false)
+                .func<&func_t::v, entt::as_void_t>("v"_hs)
+                .func<&func_t::a, entt::as_ref_t>("a"_hs);
+    }
+
+    void SetUp() override {
+        base_t::counter = 0;
+    }
+};
+
+TEST_F(Meta, MetaFunc) {
+    auto func = entt::resolve<func_t>().func("f2"_hs);
+    func_t instance{};
+
+    ASSERT_TRUE(func);
+    ASSERT_EQ(func.parent(), entt::resolve_id("func"_hs));
+    ASSERT_EQ(func.id(), "f2"_hs);
+    ASSERT_EQ(func.size(), 2u);
+    ASSERT_FALSE(func.is_const());
+    ASSERT_FALSE(func.is_static());
+    ASSERT_EQ(func.ret(), entt::resolve<int>());
+    ASSERT_EQ(func.arg(0u), entt::resolve<int>());
+    ASSERT_EQ(func.arg(1u), entt::resolve<int>());
+    ASSERT_FALSE(func.arg(2u));
+
+    auto any = func.invoke(instance, 3, 2);
+    auto empty = func.invoke(instance);
+
+    ASSERT_FALSE(empty);
+    ASSERT_TRUE(any);
+    ASSERT_EQ(any.type(), entt::resolve<int>());
+    ASSERT_EQ(any.cast<int>(), 4);
+    ASSERT_EQ(func_t::value, 3);
+
+    func.prop([](auto prop) {
+        ASSERT_EQ(prop.key(), true);
+        ASSERT_FALSE(prop.value().template cast<bool>());
+    });
+
+    ASSERT_FALSE(func.prop(false));
+    ASSERT_FALSE(func.prop('c'));
+
+    auto prop = func.prop(true);
+
+    ASSERT_TRUE(prop);
+    ASSERT_EQ(prop.key(), true);
+    ASSERT_FALSE(prop.value().cast<bool>());
+}
+
+TEST_F(Meta, MetaFuncConst) {
+    auto func = entt::resolve<func_t>().func("f1"_hs);
+    func_t instance{};
+
+    ASSERT_TRUE(func);
+    ASSERT_EQ(func.parent(), entt::resolve_id("func"_hs));
+    ASSERT_EQ(func.id(), "f1"_hs);
+    ASSERT_EQ(func.size(), 1u);
+    ASSERT_TRUE(func.is_const());
+    ASSERT_FALSE(func.is_static());
+    ASSERT_EQ(func.ret(), entt::resolve<int>());
+    ASSERT_EQ(func.arg(0u), entt::resolve<int>());
+    ASSERT_FALSE(func.arg(1u));
+
+    auto any = func.invoke(instance, 4);
+    auto empty = func.invoke(instance, 'c');
+
+    ASSERT_FALSE(empty);
+    ASSERT_TRUE(any);
+    ASSERT_EQ(any.type(), entt::resolve<int>());
+    ASSERT_EQ(any.cast<int>(), 16);
+
+    func.prop([](auto prop) {
+        ASSERT_EQ(prop.key(), true);
+        ASSERT_FALSE(prop.value().template cast<bool>());
+    });
+
+    ASSERT_FALSE(func.prop(false));
+    ASSERT_FALSE(func.prop('c'));
+
+    auto prop = func.prop(true);
+
+    ASSERT_TRUE(prop);
+    ASSERT_EQ(prop.key(), true);
+    ASSERT_FALSE(prop.value().cast<bool>());
+}
+
+TEST_F(Meta, MetaFuncRetVoid) {
+    auto func = entt::resolve<func_t>().func("g"_hs);
+    func_t instance{};
+
+    ASSERT_TRUE(func);
+    ASSERT_EQ(func.parent(), entt::resolve_id("func"_hs));
+    ASSERT_EQ(func.id(), "g"_hs);
+    ASSERT_EQ(func.size(), 1u);
+    ASSERT_FALSE(func.is_const());
+    ASSERT_FALSE(func.is_static());
+    ASSERT_EQ(func.ret(), entt::resolve<void>());
+    ASSERT_EQ(func.arg(0u), entt::resolve<int>());
+    ASSERT_FALSE(func.arg(1u));
+
+    auto any = func.invoke(instance, 5);
+
+    ASSERT_TRUE(any);
+    ASSERT_EQ(any.type(), entt::resolve<void>());
+    ASSERT_EQ(func_t::value, 25);
+
+    func.prop([](auto prop) {
+        ASSERT_EQ(prop.key(), true);
+        ASSERT_FALSE(prop.value().template cast<bool>());
+    });
+
+    ASSERT_FALSE(func.prop(false));
+    ASSERT_FALSE(func.prop('c'));
+
+    auto prop = func.prop(true);
+
+    ASSERT_TRUE(prop);
+    ASSERT_EQ(prop.key(), true);
+    ASSERT_FALSE(prop.value().cast<bool>());
+}
+
+TEST_F(Meta, MetaFuncStatic) {
+    auto func = entt::resolve<func_t>().func("h"_hs);
+    func_t::value = 2;
+
+    ASSERT_TRUE(func);
+    ASSERT_EQ(func.parent(), entt::resolve_id("func"_hs));
+    ASSERT_EQ(func.id(), "h"_hs);
+    ASSERT_EQ(func.size(), 1u);
+    ASSERT_FALSE(func.is_const());
+    ASSERT_TRUE(func.is_static());
+    ASSERT_EQ(func.ret(), entt::resolve<int>());
+    ASSERT_EQ(func.arg(0u), entt::resolve<int>());
+    ASSERT_FALSE(func.arg(1u));
+
+    auto any = func.invoke({}, 3);
+    auto empty = func.invoke({}, 'c');
+
+    ASSERT_FALSE(empty);
+    ASSERT_TRUE(any);
+    ASSERT_EQ(any.type(), entt::resolve<int>());
+    ASSERT_EQ(any.cast<int>(), 6);
+
+    func.prop([](auto prop) {
+        ASSERT_EQ(prop.key(), true);
+        ASSERT_FALSE(prop.value().template cast<bool>());
+    });
+
+    ASSERT_FALSE(func.prop(false));
+    ASSERT_FALSE(func.prop('c'));
+
+    auto prop = func.prop(true);
+
+    ASSERT_TRUE(prop);
+    ASSERT_EQ(prop.key(), true);
+    ASSERT_FALSE(prop.value().cast<bool>());
+}
+
+TEST_F(Meta, MetaFuncStaticRetVoid) {
+    auto func = entt::resolve<func_t>().func("k"_hs);
+
+    ASSERT_TRUE(func);
+    ASSERT_EQ(func.parent(), entt::resolve_id("func"_hs));
+    ASSERT_EQ(func.id(), "k"_hs);
+    ASSERT_EQ(func.size(), 1u);
+    ASSERT_FALSE(func.is_const());
+    ASSERT_TRUE(func.is_static());
+    ASSERT_EQ(func.ret(), entt::resolve<void>());
+    ASSERT_EQ(func.arg(0u), entt::resolve<int>());
+    ASSERT_FALSE(func.arg(1u));
+
+    auto any = func.invoke({}, 42);
+
+    ASSERT_TRUE(any);
+    ASSERT_EQ(any.type(), entt::resolve<void>());
+    ASSERT_EQ(func_t::value, 42);
+
+    func.prop([](auto prop) {
+        ASSERT_TRUE(prop);
+        ASSERT_EQ(prop.key(), true);
+        ASSERT_FALSE(prop.value().template cast<bool>());
+    });
+
+    ASSERT_FALSE(func.prop(false));
+    ASSERT_FALSE(func.prop('c'));
+
+    auto prop = func.prop(true);
+
+    ASSERT_TRUE(prop);
+    ASSERT_EQ(prop.key(), true);
+    ASSERT_FALSE(prop.value().cast<bool>());
+}
+
+TEST_F(Meta, MetaFuncMetaAnyArgs) {
+    func_t instance;
+    auto any = entt::resolve<func_t>().func("f1"_hs).invoke(instance, 3);
+
+    ASSERT_TRUE(any);
+    ASSERT_EQ(any.type(), entt::resolve<int>());
+    ASSERT_EQ(any.cast<int>(), 9);
+}
+
+TEST_F(Meta, MetaFuncInvalidArgs) {
+    int value = 3;
+    ASSERT_FALSE(entt::resolve<func_t>().func("f1"_hs).invoke(value, 'c'));
+}
+
+TEST_F(Meta, MetaFuncCastAndConvert) {
+    func_t instance;
+    auto any = entt::resolve<func_t>().func("f3"_hs).invoke(instance, derived_t{}, 0, 3.);
+
+    ASSERT_TRUE(any);
+    ASSERT_EQ(any.type(), entt::resolve<int>());
+    ASSERT_EQ(any.cast<int>(), 9);
+}
+
+TEST_F(Meta, MetaFuncAsVoid) {
+    auto func = entt::resolve<func_t>().func("v"_hs);
+    func_t instance{};
+
+    ASSERT_EQ(func.invoke(instance, 42), entt::meta_any{std::in_place_type<void>});
+    ASSERT_EQ(func.ret(), entt::resolve<void>());
+    ASSERT_EQ(instance.value, 42);
+}
+
+TEST_F(Meta, MetaFuncAsAlias) {
+    func_t instance{};
+    auto func = entt::resolve<func_t>().func("a"_hs);
+    func.invoke(instance).cast<int>() = 3;
+
+    ASSERT_EQ(func.ret(), entt::resolve<int>());
+    ASSERT_EQ(instance.value, 3);
+}
+
+TEST_F(Meta, MetaFuncByReference) {
+    auto func = entt::resolve<func_t>().func("h"_hs);
+    func_t::value = 2;
+    entt::meta_any any{3};
+    int value = 4;
+
+    ASSERT_EQ(func.invoke({}, std::ref(value)).cast<int>(), 8);
+    ASSERT_EQ(func.invoke({}, *any).cast<int>(), 6);
+    ASSERT_EQ(any.cast<int>(), 6);
+    ASSERT_EQ(value, 8);
+}