canonical-data.json

{
  "exercise": "triangle",
  "comments": [
    " Pursuant to discussion in #202, we have decided NOT to test triangles ",
    " where all side lengths are positive but a + b = c. e.g:               ",
    " (2, 4, 2, Isosceles), (1, 3, 4, Scalene).                             ",
    " It's true that the triangle inequality admits such triangles.These    ",
    " triangles have zero area, however.                                    ",
    " They're degenerate triangles with all three vertices collinear.       ",
    " (In contrast, we will test (0, 0, 0, Illegal), as it is a point)      ",
    " The tests assert properties of the triangle are true or false.        ",
    " See: https://github.com/exercism/problem-specifications/issues/379 for disscussion  ",
    " of this approach                                                      ",
    " How you handle invalid triangles is up to you. These tests suggest a  ",
    " triangle is returned, but all of its properties are false. But you    ",
    " could also have the creation of an invalid triangle return an error   ",
    " or exception. Choose what is idiomatic for your language.             "
  ],
  "cases": [
    {
      "description": "equilateral triangle",
      "cases": [
        {
          "uuid": "8b2c43ac-7257-43f9-b552-7631a91988af",
          "description": "all sides are equal",
          "property": "equilateral",
          "input": {
            "sides": [2, 2, 2]
          },
          "expected": true
        },
        {
          "uuid": "33eb6f87-0498-4ccf-9573-7f8c3ce92b7b",
          "description": "any side is unequal",
          "property": "equilateral",
          "input": {
            "sides": [2, 3, 2]
          },
          "expected": false
        },
        {
          "uuid": "c6585b7d-a8c0-4ad8-8a34-e21d36f7ad87",
          "description": "no sides are equal",
          "property": "equilateral",
          "input": {
            "sides": [5, 4, 6]
          },
          "expected": false
        },
        {
          "uuid": "16e8ceb0-eadb-46d1-b892-c50327479251",
          "description": "all zero sides is not a triangle",
          "property": "equilateral",
          "input": {
            "sides": [0, 0, 0]
          },
          "expected": false
        },
        {
          "uuid": "3022f537-b8e5-4cc1-8f12-fd775827a00c",
          "description": "sides may be floats",
          "comments": [
            " Your track may choose to skip this test    ",
            " and deal only with integers if appropriate "
          ],
          "scenarios": ["floating-point"],
          "property": "equilateral",
          "input": {
            "sides": [0.5, 0.5, 0.5]
          },
          "expected": true
        }
      ]
    },
    {
      "description": "isosceles triangle",
      "cases": [
        {
          "uuid": "cbc612dc-d75a-4c1c-87fc-e2d5edd70b71",
          "description": "last two sides are equal",
          "property": "isosceles",
          "input": {
            "sides": [3, 4, 4]
          },
          "expected": true
        },
        {
          "uuid": "e388ce93-f25e-4daf-b977-4b7ede992217",
          "description": "first two sides are equal",
          "property": "isosceles",
          "input": {
            "sides": [4, 4, 3]
          },
          "expected": true
        },
        {
          "uuid": "d2080b79-4523-4c3f-9d42-2da6e81ab30f",
          "description": "first and last sides are equal",
          "property": "isosceles",
          "input": {
            "sides": [4, 3, 4]
          },
          "expected": true
        },
        {
          "uuid": "8d71e185-2bd7-4841-b7e1-71689a5491d8",
          "description": "equilateral triangles are also isosceles",
          "property": "isosceles",
          "input": {
            "sides": [4, 4, 4]
          },
          "expected": true
        },
        {
          "uuid": "840ed5f8-366f-43c5-ac69-8f05e6f10bbb",
          "description": "no sides are equal",
          "property": "isosceles",
          "input": {
            "sides": [2, 3, 4]
          },
          "expected": false
        },
        {
          "uuid": "2eba0cfb-6c65-4c40-8146-30b608905eae",
          "description": "first triangle inequality violation",
          "property": "isosceles",
          "input": {
            "sides": [1, 1, 3]
          },
          "expected": false
        },
        {
          "uuid": "278469cb-ac6b-41f0-81d4-66d9b828f8ac",
          "description": "second triangle inequality violation",
          "property": "isosceles",
          "input": {
            "sides": [1, 3, 1]
          },
          "expected": false
        },
        {
          "uuid": "90efb0c7-72bb-4514-b320-3a3892e278ff",
          "description": "third triangle inequality violation",
          "property": "isosceles",
          "input": {
            "sides": [3, 1, 1]
          },
          "expected": false
        },
        {
          "uuid": "adb4ee20-532f-43dc-8d31-e9271b7ef2bc",
          "description": "sides may be floats",
          "comments": [
            " Your track may choose to skip this test    ",
            " and deal only with integers if appropriate "
          ],
          "scenarios": ["floating-point"],
          "property": "isosceles",
          "input": {
            "sides": [0.5, 0.4, 0.5]
          },
          "expected": true
        }
      ]
    },
    {
      "description": "scalene triangle",
      "cases": [
        {
          "uuid": "e8b5f09c-ec2e-47c1-abec-f35095733afb",
          "description": "no sides are equal",
          "property": "scalene",
          "input": {
            "sides": [5, 4, 6]
          },
          "expected": true
        },
        {
          "uuid": "2510001f-b44d-4d18-9872-2303e7977dc1",
          "description": "all sides are equal",
          "property": "scalene",
          "input": {
            "sides": [4, 4, 4]
          },
          "expected": false
        },
        {
          "uuid": "c6e15a92-90d9-4fb3-90a2-eef64f8d3e1e",
          "description": "first and second sides are equal",
          "property": "scalene",
          "input": {
            "sides": [4, 4, 3]
          },
          "expected": false
        },
        {
          "uuid": "3da23a91-a166-419a-9abf-baf4868fd985",
          "description": "first and third sides are equal",
          "property": "scalene",
          "input": {
            "sides": [3, 4, 3]
          },
          "expected": false
        },
        {
          "uuid": "b6a75d98-1fef-4c42-8e9a-9db854ba0a4d",
          "description": "second and third sides are equal",
          "property": "scalene",
          "input": {
            "sides": [4, 3, 3]
          },
          "expected": false
        },
        {
          "uuid": "70ad5154-0033-48b7-af2c-b8d739cd9fdc",
          "description": "may not violate triangle inequality",
          "property": "scalene",
          "input": {
            "sides": [7, 3, 2]
          },
          "expected": false
        },
        {
          "uuid": "26d9d59d-f8f1-40d3-ad58-ae4d54123d7d",
          "description": "sides may be floats",
          "comments": [
            " Your track may choose to skip this test    ",
            " and deal only with integers if appropriate "
          ],
          "scenarios": ["floating-point"],
          "property": "scalene",
          "input": {
            "sides": [0.5, 0.4, 0.6]
          },
          "expected": true
        }
      ]
    }
  ]
}