[FEAT] Chapter 07 is done.

tests/07_making_scene.cpp

@@ -635,3 +635,41 @@ SCENARIO("Constructing a ray when the camera is transformed", "[features/camera.
         }
     }
 }
+
+/* ------------------------------------------------------------------------- */
+
+SCENARIO("Rendering a world with the camera", "[features/camera.feature]")
+{
+    GIVEN("w <- default_world()")
+    {
+        World w = World::default_world();
+        AND_GIVEN("c <- camera(11, 11, pi/2)")
+        {
+            Camera c(11, 11, std::numbers::pi / 2);
+            AND_GIVEN("from <- point(0, 0, -5)")
+            {
+                Tuple from = Tuple::Point(0, 0, -5);
+                AND_GIVEN("to <- point(0, 0, 0)")
+                {
+                    Tuple to = Tuple::Point(0, 0, 0);
+                    AND_GIVEN("up <- vector(0, 1, 0)")
+                    {
+                        Tuple up = Tuple::Vector(0, 1, 0);
+                        AND_GIVEN("c.transform <- view_transform(from, to, up)")
+                        {
+                            c.set_transform(Matrix::view_transform(from, to, up));
+                            WHEN("image <- c.render(w)")
+                            {
+                                Canvas image = c.render(w);
+                                THEN("pixel_at(image, 5, 5) = color(0.38066, 0.47583, 0.2855)")
+                                {
+                                    REQUIRE(image.pixel_at(5, 5) == Color(0.38066, 0.47583, 0.2855));
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}