{
  "exercise": "run-length-encoding",
  "version": "1.0.0",
  "cases": [
    {
      "description": "run-length encode a string",
      "cases": [
        {
          "description": "empty string",
          "property": "encode",
          "input": "",
          "expected": ""
        },
        {
          "description": "single characters only are encoded without count",
          "property": "encode",
          "input": "XYZ",
          "expected": "XYZ"
        },
        {
          "description": "string with no single characters",
          "property": "encode",
          "input": "AABBBCCCC",
          "expected": "2A3B4C"
        },
        {
          "description": "single characters mixed with repeated characters",
          "property": "encode",
          "input": "WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWB",
          "expected": "12WB12W3B24WB"
        },
        {
          "description": "multiple whitespace mixed in string",
          "property": "encode",
          "input": "  hsqq qww  ",
          "expected": "2 hs2q q2w2 "
        },
        {
          "description": "lowercase characters",
          "property": "encode",
          "input": "aabbbcccc",
          "expected": "2a3b4c"
        }
      ]
    },
    {
      "description": "run-length decode a string",
      "cases": [
        {
          "description": "empty string",
          "property": "decode",
          "input": "",
          "expected": ""
        },
        {
          "description": "single characters only",
          "property": "decode",
          "input": "XYZ",
          "expected": "XYZ"
        },
        {
          "description": "string with no single characters",
          "property": "decode",
          "input": "2A3B4C",
          "expected": "AABBBCCCC"
        },
        {
          "description": "single characters with repeated characters",
          "property": "decode",
          "input": "12WB12W3B24WB",
          "expected": "WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWB"
        },
        {
          "description": "multiple whitespace mixed in string",
          "property": "decode",
          "input": "2 hs2q q2w2 ",
          "expected": "  hsqq qww  "
        },
        {
          "description": "lower case string",
          "property": "decode",
          "input": "2a3b4c",
          "expected": "aabbbcccc"
        }
      ]
    },
    {
      "description": "encode and then decode",
      "cases": [
        {
          "description": "encode followed by decode gives original string",
          "property": "consistency",
          "input": "zzz ZZ  zZ",
          "expected": "zzz ZZ  zZ"
        }
      ]
    }
  ]
}