crypto-square.json

{
  "normalized_plaintext": {
    "description": "the spaces and punctuation are removed from the English text and the message is downcased",
    "cases": [
      {
        "description": "Lowercase",
        "plaintext": "Hello",
        "expected": "hello"
      },
      {
        "description": "Remove spaces",
        "plaintext": "Hi there",
        "expected": "hithere"
      },
      {
        "description": "Remove punctuation",
        "plaintext": "@1, 2%, 3 Go!",
        "expected": "123go"
      }
    ]
  },
  "plaintext_segments": {
    "description": "The plaintext should be organized in to a rectangle.  The size of the rectangle (`r x c`) should be decided by the length of the message, such that `c >= r` and `c - r <= 1`, where `c` is the number of columns and `r` is the number of rows.",
    "cases": [
      {
        "description": "empty plaintext results in an empty rectangle",
        "plaintext": "",
        "expected": "[]"
      },
      {
        "description": "4 character plaintext results in an 2x2 rectangle",
        "plaintext": "Ab Cd",
        "expected": [
          "ab",
          "cd"
        ]
      },
      {
        "description": "9 character plaintext results in an 3x3 rectangle",
        "plaintext": "This is fun!",
        "expected": [
          "thi",
          "sis",
          "fun"
        ]
      },
      {
        "description": "54 character plaintext results in an 8x7 rectangle",
        "plaintext": "If man was meant to stay on the ground, god would have given us roots.",
        "expected": [
          "ifmanwas",
          "meanttos",
          "tayonthe",
          "groundgo",
          "dwouldha",
          "vegivenu",
          "sroots"
        ]
      }
    ]
  },
  "encoded": {
    "description": "The coded message is obtained by reading down the columns going left to right.",
    "cases": [
      {
        "description": "empty plaintext results in an empty encode",
        "plaintext": "",
        "expected": ""
      },
      {
        "description": "Non-empty plaintext results in the combined plaintext segments",
        "plaintext": "If man was meant to stay on the ground, god would have given us roots.",
        "expected": "imtgdvsfearwermayoogoanouuiontnnlvtwttddesaohghnsseoau"
      }
    ]
  },
  "ciphertext": {
    "description": "Output the encoded text in chunks.  Phrases that fill perfect squares `(r X r)` should be output in `r`-length chunks separated by spaces.  Imperfect squares will have `n` empty spaces.  Those spaces should be distributed evenly across the last `n` rows.",
    "cases": [
      {
        "description": "empty plaintext results in an empty ciphertext",
        "plaintext": "",
        "expected": ""
      },
      {
        "description": "9 character plaintext results in 3 chunks of 3 characters",
        "plaintext": "This is fun!",
        "expected": "tsf hiu isn"
      },
      {
        "description": "54 character plaintext results in 7 chunks, the last two padded with spaces",
        "plaintext": "If man was meant to stay on the ground, god would have given us roots.",
        "expected": "imtgdvs fearwer mayoogo anouuio ntnnlvt wttddes aohghn  sseoau "
      }
    ]
  }
}