{
  "exercise": "isogram",
  "comments": [
    "An isogram is a word or phrase without a repeating letter."
  ],
  "version": "1.3.0",
  "cases": [
    {
      "description": "Check if the given string is an isogram",
      "comments": [
        "Output should be a boolean denoting if the string is a isogram or not."
      ],
      "cases": [
        {
          "description": "empty string",
          "property": "isIsogram",
          "input": {
            "phrase": ""
          },
          "expected": true
        },
        {
          "description": "isogram with only lower case characters",
          "property": "isIsogram",
          "input": {
            "phrase": "isogram"
          },
          "expected": true
        },
        {
          "description": "word with one duplicated character",
          "property": "isIsogram",
          "input": {
            "phrase": "eleven"
          },
          "expected": false
        },
        {
          "description": "longest reported english isogram",
          "property": "isIsogram",
          "input": {
            "phrase": "subdermatoglyphic"
          },
          "expected": true
        },
        {
          "description": "word with duplicated character in mixed case",
          "property": "isIsogram",
          "input": {
            "phrase": "Alphabet"
          },
          "expected": false
        },
        {
          "description": "hypothetical isogrammic word with hyphen",
          "property": "isIsogram",
          "input": {
            "phrase": "thumbscrew-japingly"
          },
          "expected": true
        },
        {
          "description": "isogram with duplicated hyphen",
          "property": "isIsogram",
          "input": {
            "phrase": "six-year-old"
          },
          "expected": true
        },
        {
          "description": "made-up name that is an isogram",
          "property": "isIsogram",
          "input": {
            "phrase": "Emily Jung Schwartzkopf"
          },
          "expected": true
        },
        {
          "description": "duplicated character in the middle",
          "property": "isIsogram",
          "input": {
            "phrase": "accentor"
          },
          "expected": false
        }
      ]
    }
  ]
}