implement royale game mode and tighten spaces in duel mode

tests/test_BestBattleSnake.py

@@ -328,6 +328,84 @@ class TestBestBattleSnake(unittest.TestCase):
     move = make_board(game_state).snake_neat_make_a_move()
     self.assertNotEqual(move, "up")
 
+  def test_royale_uses_ruleset_hazard_damage_setting(self):
+    game_state = {
+      "game": {
+        "id": "test-royale-hazard-setting",
+        "ruleset": {
+          "name": "standard",
+          "version": "v1.0.0",
+          "settings": {"hazardDamagePerTurn": 22},
+        },
+        "source": "custom",
+        "map": "royale",
+      },
+      "turn": 5,
+      "board": {
+        "height": 11,
+        "width": 11,
+        "food": [],
+        "hazards": [],
+        "snakes": [
+          {
+            "id": "me",
+            "name": "me",
+            "health": 80,
+            "length": 3,
+            "head": {"x": 5, "y": 5},
+            "body": [
+              {"x": 5, "y": 5},
+              {"x": 5, "y": 4},
+              {"x": 5, "y": 3},
+            ],
+          }
+        ],
+      },
+      "you": {
+        "id": "me",
+        "name": "me",
+        "health": 80,
+        "length": 3,
+        "head": {"x": 5, "y": 5},
+        "body": [
+          {"x": 5, "y": 5},
+          {"x": 5, "y": 4},
+          {"x": 5, "y": 3},
+        ],
+      },
+    }
+
+    board = make_board(game_state)
+    snake = board.snake_class
+    self.assertEqual(snake._hazard_damage_per_turn(board), 22)
+
+  def test_royale_new_hazard_has_spawn_grace(self):
+    snake = BestBattleSnake()
+    point = (4, 4)
+    hazard_set = {point}
+
+    self.assertFalse(
+      snake._hazard_is_active(
+        point, ate_food=False, hazard_set=hazard_set, previous_hazard_set=set()
+      )
+    )
+    self.assertTrue(
+      snake._hazard_is_active(
+        point,
+        ate_food=False,
+        hazard_set=hazard_set,
+        previous_hazard_set=hazard_set,
+      )
+    )
+    self.assertFalse(
+      snake._hazard_is_active(
+        point,
+        ate_food=True,
+        hazard_set=hazard_set,
+        previous_hazard_set=hazard_set,
+      )
+    )
+
   def test_constrictor_avoids_growth_dead_end(self):
     game_state = {
       "game": {
@@ -393,6 +471,75 @@ class TestBestBattleSnake(unittest.TestCase):
     move = make_board(game_state).snake_neat_make_a_move()
     self.assertEqual(move, "up")
 
+  def test_duel_tightens_space_when_enemy_is_encased(self):
+    game_state = {
+      "game": {
+        "id": "test-encase-tighten",
+        "ruleset": {"name": "standard", "version": "v1.0.0"},
+        "source": "custom",
+        "map": "standard",
+      },
+      "turn": 40,
+      "board": {
+        "height": 7,
+        "width": 7,
+        "food": [{"x": 0, "y": 0}],
+        "hazards": [],
+        "snakes": [
+          {
+            "id": "me",
+            "name": "me",
+            "health": 92,
+            "length": 8,
+            "head": {"x": 2, "y": 3},
+            "body": [
+              {"x": 2, "y": 3},
+              {"x": 2, "y": 2},
+              {"x": 1, "y": 2},
+              {"x": 1, "y": 3},
+              {"x": 1, "y": 4},
+              {"x": 2, "y": 4},
+              {"x": 3, "y": 4},
+              {"x": 3, "y": 5},
+            ],
+          },
+          {
+            "id": "enemy",
+            "name": "enemy",
+            "health": 88,
+            "length": 5,
+            "head": {"x": 4, "y": 3},
+            "body": [
+              {"x": 4, "y": 3},
+              {"x": 5, "y": 3},
+              {"x": 5, "y": 2},
+              {"x": 4, "y": 2},
+              {"x": 4, "y": 1},
+            ],
+          },
+        ],
+      },
+      "you": {
+        "id": "me",
+        "name": "me",
+        "health": 92,
+        "length": 8,
+        "head": {"x": 2, "y": 3},
+        "body": [
+          {"x": 2, "y": 3},
+          {"x": 2, "y": 2},
+          {"x": 1, "y": 2},
+          {"x": 1, "y": 3},
+          {"x": 1, "y": 4},
+          {"x": 2, "y": 4},
+          {"x": 3, "y": 4},
+          {"x": 3, "y": 5},
+        ],
+      },
+    }
+
+    move = make_board(game_state).snake_neat_make_a_move()
+    self.assertEqual(move, "right")
 
 if __name__ == "__main__":
   unittest.main()