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

tests/Engine/Core/ClockTest.cpp

@@ -0,0 +1,50 @@
+#include <Nazara/Core/Clock.hpp>
+#include <Catch/catch.hpp>
+#include <chrono>
+#include <thread>
+
+SCENARIO("Clock", "[CORE][CLOCK]")
+{
+	GIVEN("A clock paused")
+	{
+		Nz::UInt64 initialTime = 100;
+		Nz::Clock clock(initialTime, true);
+
+		WHEN("We get time since it is paused")
+		{
+			THEN("Time must be the initialTime")
+			{
+				CHECK(clock.GetMicroseconds() == initialTime);
+				CHECK(clock.IsPaused());
+			}
+		}
+
+		WHEN("We unpause it")
+		{
+			clock.Unpause();
+			REQUIRE(!clock.IsPaused());
+
+			THEN("Time must not be the initialTime")
+			{
+				std::this_thread::sleep_for(std::chrono::milliseconds(1));
+				Nz::UInt64 microSeconds = clock.GetMicroseconds();
+				CHECK(microSeconds != initialTime);
+				CHECK(microSeconds / 1000 <= clock.GetMilliseconds());
+				CHECK(microSeconds / (1000.f * 1000.f) <= clock.GetSeconds());
+			}
+		}
+
+		WHEN("We restart it")
+		{
+			clock.Restart();
+
+			THEN("It is unpaused and we can pause it")
+			{
+				CHECK(!clock.IsPaused());
+				clock.Pause();
+				CHECK(clock.IsPaused());
+				CHECK(clock.GetMicroseconds() != initialTime);
+			}
+		}
+	}
+}