{
  "exercise": "nucleotide-count",
  "version": "1.2.0",
  "cases": [
    {
      "description": "count all nucleotides in a strand",
      "cases": [
        {
          "description": "empty strand",
          "property": "nucleotideCounts",
          "strand": "",
          "expected": {
            "A": 0,
            "C": 0,
            "G": 0,
            "T": 0
          }
        },
        {
          "description": "can count one nucleotide in single-character input",
          "property": "nucleotideCounts",
          "strand": "G",
          "expected": {
            "A": 0,
            "C": 0,
            "G": 1,
            "T": 0
          }
        },
        {
          "description": "strand with repeated nucleotide",
          "property": "nucleotideCounts",
          "strand": "GGGGGGG",
          "expected": {
            "A": 0,
            "C": 0,
            "G": 7,
            "T": 0
          }
        },
        {
          "description": "strand with multiple nucleotides",
          "property": "nucleotideCounts",
          "strand": "AGCTTTTCATTCTGACTGCAACGGGCAATATGTCTCTGTGTGGATTAAAAAAAGAGTGTCTGATAGCAGC",
          "expected": {
            "A": 20,
            "C": 12,
            "G": 17,
            "T": 21
          }
        },
        {
          "description": "strand with invalid nucleotides",
          "property": "nucleotideCounts",
          "strand": "AGXXACT",
          "expected": {
            "error": "Invalid nucleotide in strand"
          }
        }
      ]
    }
  ]
}