New tests !

Former-commit-id: 1cb5949ce7b9fde74189a37c75f0b3380fda95c7

tests/Engine/Math/Sphere.cpp

@@ -59,5 +59,45 @@ SCENARIO("Sphere", "[MATH][SPHERE]")
 				REQUIRE(centerUnitBox.GetSquaredBoundingSphere() == Nz::Spheref(Nz::Vector3f::Zero(), 0.75f));
 			}
 		}
+
+		WHEN("We ask for positive and negative vertex")
+		{
+			Nz::Vector3f positiveVector = Nz::Vector3f::UnitY();
+
+			THEN("Positive vertex should be the same with centered and unit sphere")
+			{
+				REQUIRE(positiveVector == firstCenterAndUnit.GetPositiveVertex(positiveVector));
+			}
+
+			AND_THEN("Negative vertex should be the opposite")
+			{
+				REQUIRE(-positiveVector == firstCenterAndUnit.GetNegativeVertex(positiveVector));
+			}
+		}
+
+		WHEN("We extend the unit sphere to one point")
+		{
+			Nz::Vector3f point = Nz::Vector3f::UnitY() * 2.f;
+
+			firstCenterAndUnit.ExtendTo(point);
+
+			THEN("Sphere must contain it and distance should be good")
+			{
+				CHECK(firstCenterAndUnit.Contains(point));
+				REQUIRE(firstCenterAndUnit.Distance(point) == 2.f);
+			}
+		}
+
+		WHEN("We try to lerp")
+		{
+			THEN("Compilation should be fine")
+			{
+				Nz::Spheref nullRect = Nz::Spheref::Zero();
+				Nz::Spheref centerAndUnit = firstCenterAndUnit;
+				Nz::Spheref result(Nz::Vector3f::Zero(), 0.5f);
+
+				REQUIRE(Nz::Spheref::Lerp(nullRect, centerAndUnit, 0.5f) == result);
+			}
+		}
 	}
 }