Lua tests (#158)

* Fix float comparison in tests

* Lua tests

tests/Engine/Lua/LuaInstance.cpp

@@ -0,0 +1,84 @@
+#include <Nazara/Lua/LuaInstance.hpp>
+#include <Catch/catch.hpp>
+#include <iostream>
+
+SCENARIO("LuaInstance", "[LUA][LUAINSTANCE]")
+{
+	GIVEN("One lua instance")
+	{
+		Nz::LuaInstance luaInstance;
+
+		WHEN("We set memory constraint")
+		{
+			luaInstance.SetMemoryLimit(1'000);
+
+			THEN("If we excess memory, it should crash")
+			{
+				REQUIRE_THROWS_WITH(luaInstance.Execute(R"(
+						global t = {}
+						for 1,10000000 do
+							t[i] = i
+						end
+					)"), Catch::Matchers::Contains("memory"));
+			}
+		}
+
+		WHEN("We set time constraint")
+		{
+			luaInstance.SetTimeLimit(10);
+
+			THEN("If we excess time, it should produce an error")
+			{
+				CHECK(!luaInstance.Execute(R"(
+					function ack(M,N)
+						if M == 0 then return N + 1 end
+						if N == 0 then return ack(M-1,1) end
+						return ack(M-1,ack(M, N-1))
+					end
+					ack(100, 100)
+				)"));
+
+				REQUIRE_THAT(luaInstance.GetLastError().ToStdString(), Catch::Matchers::Contains("time"));
+			}
+		}
+	}
+
+	GIVEN("Two instances")
+	{
+		Nz::LuaInstance luaInstance;
+
+		int memoryLimit = 10'000;
+		int timeLimit = 1'000;
+		luaInstance.SetMemoryLimit(memoryLimit);
+		luaInstance.SetTimeLimit(timeLimit);
+
+		int value = 5;
+		luaInstance.PushInteger(value);
+
+		WHEN("We use move constructor")
+		{
+			Nz::LuaInstance movedInstance(std::move(luaInstance));
+
+			THEN("We should be able to retrieve the value")
+			{
+				CHECK(movedInstance.CheckInteger(1) == value);
+				CHECK(movedInstance.GetMemoryLimit() == memoryLimit);
+				CHECK(movedInstance.GetTimeLimit() == timeLimit);
+			}
+		}
+
+		WHEN("We use move assignment")
+		{
+			Nz::LuaInstance movedInstance;
+			movedInstance.PushInteger(value + 1);
+			movedInstance = std::move(luaInstance);
+
+			THEN("We should be able to retrieve the value")
+			{
+				CHECK(movedInstance.CheckInteger(1) == value);
+				CHECK(movedInstance.GetMemoryLimit() == memoryLimit);
+				CHECK(movedInstance.GetTimeLimit() == timeLimit);
+			}
+		}
+	}
+}