jmes

[
  {
    "given": { "foo": { "bar": ["zero", "one", "two"] } },
    "cases": [
      {
        "expression": "foo.bar[0]",
        "result": "zero"
      },
      {
        "expression": "foo.bar[1]",
        "result": "one"
      },
      {
        "expression": "foo.bar[2]",
        "result": "two"
      },
      {
        "expression": "foo.bar[3]",
        "result": null
      },
      {
        "expression": "foo.bar[-1]",
        "result": "two"
      },
      {
        "expression": "foo.bar[-2]",
        "result": "one"
      },
      {
        "expression": "foo.bar[-3]",
        "result": "zero"
      },
      {
        "expression": "foo.bar[-4]",
        "result": null
      }
    ]
  },
  {
    "given": {
      "foo": [
        { "bar": "one" },
        { "bar": "two" },
        { "bar": "three" },
        { "notbar": "four" }
      ]
    },
    "cases": [
      {
        "expression": "foo.bar",
        "result": null
      },
      {
        "expression": "foo[0].bar",
        "result": "one"
      },
      {
        "expression": "foo[1].bar",
        "result": "two"
      },
      {
        "expression": "foo[2].bar",
        "result": "three"
      },
      {
        "expression": "foo[3].notbar",
        "result": "four"
      },
      {
        "expression": "foo[3].bar",
        "result": null
      },
      {
        "expression": "foo[0]",
        "result": { "bar": "one" }
      },
      {
        "expression": "foo[1]",
        "result": { "bar": "two" }
      },
      {
        "expression": "foo[2]",
        "result": { "bar": "three" }
      },
      {
        "expression": "foo[3]",
        "result": { "notbar": "four" }
      },
      {
        "expression": "foo[4]",
        "result": null
      }
    ]
  },
  {
    "given": ["one", "two", "three"],
    "cases": [
      {
        "expression": "[0]",
        "result": "one"
      },
      {
        "expression": "[1]",
        "result": "two"
      },
      {
        "expression": "[2]",
        "result": "three"
      },
      {
        "expression": "[-1]",
        "result": "three"
      },
      {
        "expression": "[-2]",
        "result": "two"
      },
      {
        "expression": "[-3]",
        "result": "one"
      }
    ]
  },
  {
    "given": {
      "reservations": [{ "instances": [{ "foo": 1 }, { "foo": 2 }] }]
    },
    "cases": [
      {
        "expression": "reservations[].instances[].foo",
        "result": [1, 2]
      },
      {
        "expression": "reservations[].instances[].bar",
        "result": []
      },
      {
        "expression": "reservations[].notinstances[].foo",
        "result": []
      }
    ]
  },
  {
    "given": {
      "reservations": [
        {
          "instances": [
            {
              "foo": [{ "bar": 1 }, { "bar": 2 }, { "notbar": 3 }, { "bar": 4 }]
            },
            {
              "foo": [
                { "bar": 5 },
                { "bar": 6 },
                { "notbar": [7] },
                { "bar": 8 }
              ]
            },
            { "foo": "bar" },
            {
              "notfoo": [
                { "bar": 20 },
                { "bar": 21 },
                { "notbar": [7] },
                { "bar": 22 }
              ]
            },
            {
              "bar": [
                { "baz": [1] },
                { "baz": [2] },
                { "baz": [3] },
                { "baz": [4] }
              ]
            },
            {
              "baz": [
                { "baz": [1, 2] },
                { "baz": [] },
                { "baz": [] },
                { "baz": [3, 4] }
              ]
            },
            {
              "qux": [
                { "baz": [] },
                { "baz": [1, 2, 3] },
                { "baz": [4] },
                { "baz": [] }
              ]
            }
          ],
          "otherkey": {
            "foo": [{ "bar": 1 }, { "bar": 2 }, { "notbar": 3 }, { "bar": 4 }]
          }
        },
        {
          "instances": [
            {
              "a": [{ "bar": 1 }, { "bar": 2 }, { "notbar": 3 }, { "bar": 4 }]
            },
            {
              "b": [{ "bar": 5 }, { "bar": 6 }, { "notbar": [7] }, { "bar": 8 }]
            },
            { "c": "bar" },
            {
              "notfoo": [
                { "bar": 23 },
                { "bar": 24 },
                { "notbar": [7] },
                { "bar": 25 }
              ]
            },
            {
              "qux": [
                { "baz": [] },
                { "baz": [1, 2, 3] },
                { "baz": [4] },
                { "baz": [] }
              ]
            }
          ],
          "otherkey": {
            "foo": [{ "bar": 1 }, { "bar": 2 }, { "notbar": 3 }, { "bar": 4 }]
          }
        }
      ]
    },
    "cases": [
      {
        "expression": "reservations[].instances[].foo[].bar",
        "result": [1, 2, 4, 5, 6, 8]
      },
      {
        "expression": "reservations[].instances[].foo[].baz",
        "result": []
      },
      {
        "expression": "reservations[].instances[].notfoo[].bar",
        "result": [20, 21, 22, 23, 24, 25]
      },
      {
        "expression": "reservations[].instances[].notfoo[].notbar",
        "result": [[7], [7]]
      },
      {
        "expression": "reservations[].notinstances[].foo",
        "result": []
      },
      {
        "expression": "reservations[].instances[].foo[].notbar",
        "result": [3, [7]]
      },
      {
        "expression": "reservations[].instances[].bar[].baz",
        "result": [[1], [2], [3], [4]]
      },
      {
        "expression": "reservations[].instances[].baz[].baz",
        "result": [[1, 2], [], [], [3, 4]]
      },
      {
        "expression": "reservations[].instances[].qux[].baz",
        "result": [[], [1, 2, 3], [4], [], [], [1, 2, 3], [4], []]
      },
      {
        "expression": "reservations[].instances[].qux[].baz[]",
        "result": [1, 2, 3, 4, 1, 2, 3, 4]
      }
    ]
  },
  {
    "given": {
      "foo": [
        [["one", "two"], ["three", "four"]],
        [["five", "six"], ["seven", "eight"]],
        [["nine"], ["ten"]]
      ]
    },
    "cases": [
      {
        "expression": "foo[]",
        "result": [
          ["one", "two"],
          ["three", "four"],
          ["five", "six"],
          ["seven", "eight"],
          ["nine"],
          ["ten"]
        ]
      },
      {
        "expression": "foo[][0]",
        "result": ["one", "three", "five", "seven", "nine", "ten"]
      },
      {
        "expression": "foo[][1]",
        "result": ["two", "four", "six", "eight"]
      },
      {
        "expression": "foo[][0][0]",
        "result": []
      },
      {
        "expression": "foo[][2][2]",
        "result": []
      },
      {
        "expression": "foo[][0][0][100]",
        "result": []
      }
    ]
  },
  {
    "given": {
      "foo": [
        {
          "bar": [
            {
              "qux": 2,
              "baz": 1
            },
            {
              "qux": 4,
              "baz": 3
            }
          ]
        },
        {
          "bar": [
            {
              "qux": 6,
              "baz": 5
            },
            {
              "qux": 8,
              "baz": 7
            }
          ]
        }
      ]
    },
    "cases": [
      {
        "expression": "foo",
        "result": [
          { "bar": [{ "qux": 2, "baz": 1 }, { "qux": 4, "baz": 3 }] },
          { "bar": [{ "qux": 6, "baz": 5 }, { "qux": 8, "baz": 7 }] }
        ]
      },
      {
        "expression": "foo[]",
        "result": [
          { "bar": [{ "qux": 2, "baz": 1 }, { "qux": 4, "baz": 3 }] },
          { "bar": [{ "qux": 6, "baz": 5 }, { "qux": 8, "baz": 7 }] }
        ]
      },
      {
        "expression": "foo[].bar",
        "result": [
          [{ "qux": 2, "baz": 1 }, { "qux": 4, "baz": 3 }],
          [{ "qux": 6, "baz": 5 }, { "qux": 8, "baz": 7 }]
        ]
      },
      {
        "expression": "foo[].bar[]",
        "result": [
          { "qux": 2, "baz": 1 },
          { "qux": 4, "baz": 3 },
          { "qux": 6, "baz": 5 },
          { "qux": 8, "baz": 7 }
        ]
      },
      {
        "expression": "foo[].bar[].baz",
        "result": [1, 3, 5, 7]
      }
    ]
  },
  {
    "given": {
      "string": "string",
      "hash": { "foo": "bar", "bar": "baz" },
      "number": 23,
      "nullvalue": null
    },
    "cases": [
      {
        "expression": "string[]",
        "result": null
      },
      {
        "expression": "hash[]",
        "result": null
      },
      {
        "expression": "number[]",
        "result": null
      },
      {
        "expression": "nullvalue[]",
        "result": null
      },
      {
        "expression": "string[].foo",
        "result": null
      },
      {
        "expression": "hash[].foo",
        "result": null
      },
      {
        "expression": "number[].foo",
        "result": null
      },
      {
        "expression": "nullvalue[].foo",
        "result": null
      },
      {
        "expression": "nullvalue[].foo[].bar",
        "result": null
      }
    ]
  }
]