{
  "function": "advance",
  "cases": [
    {
      "name": "advance-plain-move",
      "args": [
        {
          "width": 5,
          "height": 5,
          "snake": [
            {
              "x": 2,
              "y": 2
            },
            {
              "x": 1,
              "y": 2
            },
            {
              "x": 0,
              "y": 2
            }
          ],
          "dir": "Right",
          "nextDir": "Right",
          "apple": null,
          "seed": 1,
          "score": 0,
          "status": "Playing",
          "frame": 0
        }
      ],
      "expected": {
        "width": 5,
        "height": 5,
        "snake": [
          {
            "x": 3,
            "y": 2
          },
          {
            "x": 2,
            "y": 2
          },
          {
            "x": 1,
            "y": 2
          }
        ],
        "dir": "Right",
        "nextDir": "Right",
        "apple": null,
        "seed": 1,
        "score": 0,
        "status": "Playing",
        "frame": 0
      }
    },
    {
      "name": "advance-moves-in-nextDir-and-records-it-as-dir",
      "args": [
        {
          "width": 5,
          "height": 5,
          "snake": [
            {
              "x": 2,
              "y": 2
            },
            {
              "x": 1,
              "y": 2
            },
            {
              "x": 0,
              "y": 2
            }
          ],
          "dir": "Right",
          "nextDir": "Up",
          "apple": null,
          "seed": 1,
          "score": 0,
          "status": "Playing",
          "frame": 0
        }
      ],
      "expected": {
        "width": 5,
        "height": 5,
        "snake": [
          {
            "x": 2,
            "y": 1
          },
          {
            "x": 2,
            "y": 2
          },
          {
            "x": 1,
            "y": 2
          }
        ],
        "dir": "Up",
        "nextDir": "Up",
        "apple": null,
        "seed": 1,
        "score": 0,
        "status": "Playing",
        "frame": 0
      }
    },
    {
      "name": "advance-keeps-apple-it-did-not-reach",
      "args": [
        {
          "width": 5,
          "height": 5,
          "snake": [
            {
              "x": 2,
              "y": 2
            },
            {
              "x": 1,
              "y": 2
            },
            {
              "x": 0,
              "y": 2
            }
          ],
          "dir": "Right",
          "nextDir": "Right",
          "apple": {
            "x": 4,
            "y": 4
          },
          "seed": 1,
          "score": 0,
          "status": "Playing",
          "frame": 0
        }
      ],
      "expected": {
        "width": 5,
        "height": 5,
        "snake": [
          {
            "x": 3,
            "y": 2
          },
          {
            "x": 2,
            "y": 2
          },
          {
            "x": 1,
            "y": 2
          }
        ],
        "dir": "Right",
        "nextDir": "Right",
        "apple": {
          "x": 4,
          "y": 4
        },
        "seed": 1,
        "score": 0,
        "status": "Playing",
        "frame": 0
      }
    },
    {
      "name": "advance-eat-grows-scores-clears-apple",
      "args": [
        {
          "width": 5,
          "height": 5,
          "snake": [
            {
              "x": 2,
              "y": 2
            },
            {
              "x": 1,
              "y": 2
            },
            {
              "x": 0,
              "y": 2
            }
          ],
          "dir": "Right",
          "nextDir": "Right",
          "apple": {
            "x": 3,
            "y": 2
          },
          "seed": 1,
          "score": 4,
          "status": "Playing",
          "frame": 0
        }
      ],
      "expected": {
        "width": 5,
        "height": 5,
        "snake": [
          {
            "x": 3,
            "y": 2
          },
          {
            "x": 2,
            "y": 2
          },
          {
            "x": 1,
            "y": 2
          },
          {
            "x": 0,
            "y": 2
          }
        ],
        "dir": "Right",
        "nextDir": "Right",
        "apple": null,
        "seed": 1,
        "score": 5,
        "status": "Playing",
        "frame": 0
      }
    },
    {
      "name": "advance-into-wall-is-game-over",
      "args": [
        {
          "width": 5,
          "height": 5,
          "snake": [
            {
              "x": 4,
              "y": 2
            },
            {
              "x": 3,
              "y": 2
            },
            {
              "x": 2,
              "y": 2
            }
          ],
          "dir": "Right",
          "nextDir": "Right",
          "apple": null,
          "seed": 1,
          "score": 0,
          "status": "Playing",
          "frame": 0
        }
      ],
      "expected": {
        "width": 5,
        "height": 5,
        "snake": [
          {
            "x": 4,
            "y": 2
          },
          {
            "x": 3,
            "y": 2
          },
          {
            "x": 2,
            "y": 2
          }
        ],
        "dir": "Right",
        "nextDir": "Right",
        "apple": null,
        "seed": 1,
        "score": 0,
        "status": "GameOver",
        "frame": 0
      }
    },
    {
      "name": "advance-into-top-wall-records-turn",
      "args": [
        {
          "width": 5,
          "height": 5,
          "snake": [
            {
              "x": 2,
              "y": 0
            },
            {
              "x": 2,
              "y": 1
            },
            {
              "x": 2,
              "y": 2
            }
          ],
          "dir": "Up",
          "nextDir": "Up",
          "apple": null,
          "seed": 1,
          "score": 0,
          "status": "Playing",
          "frame": 0
        }
      ],
      "expected": {
        "width": 5,
        "height": 5,
        "snake": [
          {
            "x": 2,
            "y": 0
          },
          {
            "x": 2,
            "y": 1
          },
          {
            "x": 2,
            "y": 2
          }
        ],
        "dir": "Up",
        "nextDir": "Up",
        "apple": null,
        "seed": 1,
        "score": 0,
        "status": "GameOver",
        "frame": 0
      }
    },
    {
      "name": "advance-into-own-body-is-game-over",
      "args": [
        {
          "width": 5,
          "height": 5,
          "snake": [
            {
              "x": 2,
              "y": 2
            },
            {
              "x": 3,
              "y": 2
            },
            {
              "x": 3,
              "y": 3
            },
            {
              "x": 2,
              "y": 3
            },
            {
              "x": 1,
              "y": 3
            }
          ],
          "dir": "Left",
          "nextDir": "Down",
          "apple": null,
          "seed": 1,
          "score": 0,
          "status": "Playing",
          "frame": 0
        }
      ],
      "expected": {
        "width": 5,
        "height": 5,
        "snake": [
          {
            "x": 2,
            "y": 2
          },
          {
            "x": 3,
            "y": 2
          },
          {
            "x": 3,
            "y": 3
          },
          {
            "x": 2,
            "y": 3
          },
          {
            "x": 1,
            "y": 3
          }
        ],
        "dir": "Down",
        "nextDir": "Down",
        "apple": null,
        "seed": 1,
        "score": 0,
        "status": "GameOver",
        "frame": 0
      }
    },
    {
      "name": "advance-into-vacating-tail",
      "args": [
        {
          "width": 5,
          "height": 5,
          "snake": [
            {
              "x": 1,
              "y": 1
            },
            {
              "x": 1,
              "y": 2
            },
            {
              "x": 2,
              "y": 2
            },
            {
              "x": 2,
              "y": 1
            }
          ],
          "dir": "Up",
          "nextDir": "Right",
          "apple": null,
          "seed": 1,
          "score": 0,
          "status": "Playing",
          "frame": 0
        }
      ],
      "expected": {
        "width": 5,
        "height": 5,
        "snake": [
          {
            "x": 2,
            "y": 1
          },
          {
            "x": 1,
            "y": 1
          },
          {
            "x": 1,
            "y": 2
          },
          {
            "x": 2,
            "y": 2
          }
        ],
        "dir": "Right",
        "nextDir": "Right",
        "apple": null,
        "seed": 1,
        "score": 0,
        "status": "Playing",
        "frame": 0
      }
    },
    {
      "name": "advance-into-tail-while-eating",
      "args": [
        {
          "width": 5,
          "height": 5,
          "snake": [
            {
              "x": 1,
              "y": 1
            },
            {
              "x": 1,
              "y": 2
            },
            {
              "x": 2,
              "y": 2
            },
            {
              "x": 2,
              "y": 1
            }
          ],
          "dir": "Up",
          "nextDir": "Right",
          "apple": {
            "x": 2,
            "y": 1
          },
          "seed": 1,
          "score": 0,
          "status": "Playing",
          "frame": 0
        }
      ],
      "expected": {
        "width": 5,
        "height": 5,
        "snake": [
          {
            "x": 1,
            "y": 1
          },
          {
            "x": 1,
            "y": 2
          },
          {
            "x": 2,
            "y": 2
          },
          {
            "x": 2,
            "y": 1
          }
        ],
        "dir": "Right",
        "nextDir": "Right",
        "apple": {
          "x": 2,
          "y": 1
        },
        "seed": 1,
        "score": 0,
        "status": "GameOver",
        "frame": 0
      }
    },
    {
      "name": "advance-paused-unchanged",
      "args": [
        {
          "width": 5,
          "height": 5,
          "snake": [
            {
              "x": 2,
              "y": 2
            },
            {
              "x": 1,
              "y": 2
            },
            {
              "x": 0,
              "y": 2
            }
          ],
          "dir": "Right",
          "nextDir": "Up",
          "apple": null,
          "seed": 1,
          "score": 0,
          "status": "Paused",
          "frame": 0
        }
      ],
      "expected": {
        "width": 5,
        "height": 5,
        "snake": [
          {
            "x": 2,
            "y": 2
          },
          {
            "x": 1,
            "y": 2
          },
          {
            "x": 0,
            "y": 2
          }
        ],
        "dir": "Right",
        "nextDir": "Up",
        "apple": null,
        "seed": 1,
        "score": 0,
        "status": "Paused",
        "frame": 0
      }
    },
    {
      "name": "advance-game-over-unchanged",
      "args": [
        {
          "width": 5,
          "height": 5,
          "snake": [
            {
              "x": 2,
              "y": 2
            },
            {
              "x": 1,
              "y": 2
            },
            {
              "x": 0,
              "y": 2
            }
          ],
          "dir": "Right",
          "nextDir": "Right",
          "apple": null,
          "seed": 1,
          "score": 0,
          "status": "GameOver",
          "frame": 0
        }
      ],
      "expected": {
        "width": 5,
        "height": 5,
        "snake": [
          {
            "x": 2,
            "y": 2
          },
          {
            "x": 1,
            "y": 2
          },
          {
            "x": 0,
            "y": 2
          }
        ],
        "dir": "Right",
        "nextDir": "Right",
        "apple": null,
        "seed": 1,
        "score": 0,
        "status": "GameOver",
        "frame": 0
      }
    },
    {
      "name": "advance-won-unchanged",
      "args": [
        {
          "width": 5,
          "height": 5,
          "snake": [
            {
              "x": 2,
              "y": 2
            },
            {
              "x": 1,
              "y": 2
            },
            {
              "x": 0,
              "y": 2
            }
          ],
          "dir": "Right",
          "nextDir": "Right",
          "apple": null,
          "seed": 1,
          "score": 0,
          "status": "Won",
          "frame": 0
        }
      ],
      "expected": {
        "width": 5,
        "height": 5,
        "snake": [
          {
            "x": 2,
            "y": 2
          },
          {
            "x": 1,
            "y": 2
          },
          {
            "x": 0,
            "y": 2
          }
        ],
        "dir": "Right",
        "nextDir": "Right",
        "apple": null,
        "seed": 1,
        "score": 0,
        "status": "Won",
        "frame": 0
      }
    }
  ]
}