Added a test from the list: we can move to the top edge of a planet.

spec/operating_mars_rover_spec.rb

@@ -166,7 +166,15 @@
         expect(mars_rover).to be_located_at(right_hand_edge)
       end
 
-      it 'can move to the top edge of the planet'
+      it 'can move to the top edge of the planet' do
+        mars_rover = MarsRover.new(map: Map.new, starting_position: Coordinates.new(x: 0, y: 9), direction: 'N')
+
+        mars_rover.execute(['f'])
+
+        top_edge = Coordinates.new(x: 0, y: 10)
+        expect(mars_rover).to be_located_at(top_edge)
+      end
+
       it 'can move from the top edge of the planet and reappear at the bottom edge'
       it 'can move to the bottom edge of the planet'
       it 'can move from the bottom edge of the planet and reappear at the top edge'