suppress some warnings

tests/Data/Containers/ArrayTest.cpp

@@ -245,7 +245,7 @@ TEST_CASE("Iterator constructor", "[Array]")
 		char data[] = "Hello world";
 		Array<char> arr(data, data + sizeof(data));
 		REQUIRE(arr.Data() != data);
-		for (int i = 0; i < sizeof(data); i++)
+		for (size_t i = 0; i < sizeof(data); i++)
 		{
 			REQUIRE(data[i] == arr[i]);
 		}
@@ -254,7 +254,7 @@ TEST_CASE("Iterator constructor", "[Array]")
 	{
 		Array<int> arr = { 1, 2, 3, 4, 5 };
 		Array<double> arr2(arr.begin(), arr.end());
-		for (int i = 0; i < arr.Size(); i++)
+		for (size_t i = 0; i < arr.Size(); i++)
 		{
 			REQUIRE(arr[i] == arr2[i]);
 		}

tests/Scene/RayTest.cpp

@@ -42,7 +42,6 @@ TEST_CASE("RaySphereIntersection")
 		// this returns just closest point
 		if (auto opt = ray.IntersectSphere(Vector3f(0), 1))
 		{
-			opt->GetDistance();
 			REQUIRE(opt.value() == h1);
 		}
 	}