UnitTests: Rename .cpp (it was confusing the debugger)

tests/Engine/Core/SignalTest.cpp

@@ -0,0 +1,48 @@
+#include <Nazara/Core/Signal.hpp>
+#include <Catch/catch.hpp>
+
+struct Incrementer
+{
+	void increment(int* inc)
+	{
+		*inc += 1;
+	}
+};
+
+void increment(int* inc)
+{
+	*inc += 1;
+}
+
+SCENARIO("Signal", "[CORE][SIGNAL]")
+{
+	GIVEN("A signal")
+	{
+		Nz::Signal<int*> signal;
+
+		WHEN("We connection different callbacks")
+		{
+			auto connection = signal.Connect(increment);
+			signal.Connect([](int* inc){ *inc += 1; });
+			Incrementer incrementer;
+			signal.Connect(incrementer, &Incrementer::increment);
+
+			THEN("The call of signal with inc = 0 must return 3")
+			{
+				int inc = 0;
+				signal(&inc);
+				REQUIRE(inc == 3);
+			}
+
+			AND_THEN("When we disconnect one function, there should be only two listeners")
+			{
+				connection.Disconnect();
+				REQUIRE(!connection.IsConnected());
+
+				int inc = 0;
+				signal(&inc);
+				REQUIRE(inc == 2);
+			}
+		}
+	}
+}