Im proud im understanding what im doing

Im stuck on testing my code
Im worried my code isnt doing what i want it to but i cant test it to see

obstacle_spawner.py

@@ -0,0 +1,15 @@
+from random import randint
+from obstacle import Obstacle
+
+class ObstacleSpawner:
+    display = False
+
+    def play_turn(self, game):
+        width, height = game.board_size
+        game.state['score'] += 1
+        if self.should_spawn_obstacle(game.turn_number):
+            obstacle = Obstacle((randint(0, width - 1), 0))
+            game.add_agent(obstacle)
+
+    def should_spawn_obstacle(self, turn_number):
+        return randint(0, 1000) < turn_number