{
  "function": "history",
  "cases": [
    {
      "name": "no-actions-gives-just-the-start",
      "args": [
        {
          "width": 3,
          "height": 2,
          "snake": [
            {
              "x": 0,
              "y": 0
            }
          ],
          "dir": "Right",
          "nextDir": "Right",
          "apple": {
            "x": 2,
            "y": 1
          },
          "seed": 0,
          "score": 0,
          "status": "Playing",
          "frame": 0
        },
        []
      ],
      "expected": [
        {
          "width": 3,
          "height": 2,
          "snake": [
            {
              "x": 0,
              "y": 0
            }
          ],
          "dir": "Right",
          "nextDir": "Right",
          "apple": {
            "x": 2,
            "y": 1
          },
          "seed": 0,
          "score": 0,
          "status": "Playing",
          "frame": 0
        }
      ]
    },
    {
      "name": "every-intermediate-state-is-kept",
      "args": [
        {
          "width": 3,
          "height": 2,
          "snake": [
            {
              "x": 0,
              "y": 0
            }
          ],
          "dir": "Right",
          "nextDir": "Right",
          "apple": {
            "x": 2,
            "y": 1
          },
          "seed": 0,
          "score": 0,
          "status": "Playing",
          "frame": 0
        },
        [
          {
            "tag": "Turn",
            "dir": "Down"
          },
          {
            "tag": "Tick"
          },
          {
            "tag": "Tick"
          }
        ]
      ],
      "expected": [
        {
          "width": 3,
          "height": 2,
          "snake": [
            {
              "x": 0,
              "y": 0
            }
          ],
          "dir": "Right",
          "nextDir": "Right",
          "apple": {
            "x": 2,
            "y": 1
          },
          "seed": 0,
          "score": 0,
          "status": "Playing",
          "frame": 0
        },
        {
          "width": 3,
          "height": 2,
          "snake": [
            {
              "x": 0,
              "y": 0
            }
          ],
          "dir": "Right",
          "nextDir": "Down",
          "apple": {
            "x": 2,
            "y": 1
          },
          "seed": 0,
          "score": 0,
          "status": "Playing",
          "frame": 0
        },
        {
          "width": 3,
          "height": 2,
          "snake": [
            {
              "x": 0,
              "y": 1
            }
          ],
          "dir": "Down",
          "nextDir": "Down",
          "apple": {
            "x": 2,
            "y": 1
          },
          "seed": 0,
          "score": 0,
          "status": "Playing",
          "frame": 0
        },
        {
          "width": 3,
          "height": 2,
          "snake": [
            {
              "x": 0,
              "y": 1
            }
          ],
          "dir": "Down",
          "nextDir": "Down",
          "apple": {
            "x": 2,
            "y": 1
          },
          "seed": 0,
          "score": 0,
          "status": "GameOver",
          "frame": 0
        }
      ]
    }
  ]
}