[FEAT] Update code coverage

tests/05_rays.cpp

@@ -379,6 +379,39 @@ SCENARIO("Aggregating intersections", "[features/intersections.feature]")
 
 /* ------------------------------------------------------------------------- */
 
+SCENARIO("Operations with intersections", "[features/intersections.feature]")
+{
+    GIVEN("xs <- intersections({})")
+    {
+        Intersections xs1({});
+        AND_GIVEN("s <- sphere()")
+        {
+            Sphere s;
+            Intersection i1(1, s);
+            AND_GIVEN("xs2 <- intersections({i1})")
+            {
+                Intersections xs2({i1});
+                WHEN("xs1 <- xs2")
+                {
+                    // xs2 = xs2;
+                    xs1 = xs2;
+                    THEN("xs1.count = 1")
+                    {
+                        REQUIRE(xs1.count() == 1);
+                    }
+                    Intersections xs3 = xs1;
+                    THEN("xs3.count = 1")
+                    {
+                        REQUIRE(xs3.count() == 1);
+                    }
+                }
+            }
+        }
+    }
+}
+
+/* ------------------------------------------------------------------------- */
+
 SCENARIO("Intersect sets the object on the intersection", "[features/spheres.feature]")
 {
     GIVEN("r <- ray(point(0, 0, 5), vector(0, 0, 1))")