Compile Lua as C++ (#11683)

Co-authored-by: sfan5 <sfan5@live.de>

2 files changed, 80 insertions, 0 deletions

diff --git a/src/unittest/CMakeLists.txt b/src/unittest/CMakeLists.txt
index 92f31ecac..84f769e87 100644
--- a/src/unittest/CMakeLists.txt
+++ b/src/unittest/CMakeLists.txt
@@ -11,6 +11,7 @@ set (UNITTEST_SRCS
 	${CMAKE_CURRENT_SOURCE_DIR}/test_filepath.cpp
 	${CMAKE_CURRENT_SOURCE_DIR}/test_inventory.cpp
 	${CMAKE_CURRENT_SOURCE_DIR}/test_irrptr.cpp
+	${CMAKE_CURRENT_SOURCE_DIR}/test_lua.cpp
 	${CMAKE_CURRENT_SOURCE_DIR}/test_map.cpp
 	${CMAKE_CURRENT_SOURCE_DIR}/test_map_settings_manager.cpp
 	${CMAKE_CURRENT_SOURCE_DIR}/test_mapnode.cpp
diff --git a/src/unittest/test_lua.cpp b/src/unittest/test_lua.cpp
new file mode 100644
index 000000000..fc8f895af
--- /dev/null
+++ b/src/unittest/test_lua.cpp
@@ -0,0 +1,79 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+Copyright (C) 2021 TurkeyMcMac, Jude Melton-Houghton <jwmhjwmh@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "test.h"
+
+extern "C" {
+#include <lua.h>
+#include <lauxlib.h>
+}
+
+class TestLua : public TestBase
+{
+public:
+	TestLua() { TestManager::registerTestModule(this); }
+	const char *getName() { return "TestLua"; }
+
+	void runTests(IGameDef *gamedef);
+
+	void testLuaDestructors();
+};
+
+static TestLua g_test_instance;
+
+void TestLua::runTests(IGameDef *gamedef)
+{
+	TEST(testLuaDestructors);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+namespace
+{
+
+	class DestructorDetector {
+		bool *did_destruct;
+	public:
+		DestructorDetector(bool *did_destruct) : did_destruct(did_destruct)
+		{
+			*did_destruct = false;
+		}
+		~DestructorDetector()
+		{
+			*did_destruct = true;
+		}
+	};
+
+}
+
+void TestLua::testLuaDestructors()
+{
+	bool did_destruct = false;
+
+	lua_State *L = luaL_newstate();
+	lua_cpcall(L, [](lua_State *L) -> int {
+		DestructorDetector d(reinterpret_cast<bool*>(lua_touserdata(L, 1)));
+		luaL_error(L, "error");
+		return 0;
+	}, &did_destruct);
+	lua_close(L);
+
+	UASSERT(did_destruct);
+}