[
    {
        "description": "root pointer ref",
        "schema": {
            "properties": {
                "foo": {"$ref": "#"}
            },
            "additionalProperties": false
        },
        "tests": [
            {
                "description": "match",
                "data": {"foo": false},
                "valid": true
            },
            {
                "description": "recursive match",
                "data": {"foo": {"foo": false}},
                "valid": true
            },
            {
                "description": "mismatch",
                "data": {"bar": false},
                "valid": false
            },
            {
                "description": "recursive mismatch",
                "data": {"foo": {"bar": false}},
                "valid": false
            }
        ]
    },
    {
        "description": "relative pointer ref to object",
        "schema": {
            "properties": {
                "foo": {"type": "integer"},
                "bar": {"$ref": "#/properties/foo"}
            }
        },
        "tests": [
            {
                "description": "match",
                "data": {"bar": 3},
                "valid": true
            },
            {
                "description": "mismatch",
                "data": {"bar": true},
                "valid": false
            }
        ]
    },
    {
        "description": "relative pointer ref to array",
        "schema": {
            "items": [
                {"type": "integer"},
                {"$ref": "#/items/0"}
            ]
        },
        "tests": [
            {
                "description": "match array",
                "data": [1, 2],
                "valid": true
            },
            {
                "description": "mismatch array",
                "data": [1, "foo"],
                "valid": false
            }
        ]
    },
    {
        "description": "escaped pointer ref",
        "schema": {
            "definitions": {
                "tilde~field": {"type": "integer"},
                "slash/field": {"type": "integer"},
                "percent%field": {"type": "integer"}
            },
            "properties": {
                "tilde": {"$ref": "#/definitions/tilde~0field"},
                "slash": {"$ref": "#/definitions/slash~1field"},
                "percent": {"$ref": "#/definitions/percent%25field"}
            }
        },
        "tests": [
            {
                "description": "slash invalid",
                "data": {"slash": "aoeu"},
                "valid": false
            },
            {
                "description": "tilde invalid",
                "data": {"tilde": "aoeu"},
                "valid": false
            },
            {
                "description": "percent invalid",
                "data": {"percent": "aoeu"},
                "valid": false
            },
            {
                "description": "slash valid",
                "data": {"slash": 123},
                "valid": true
            },
            {
                "description": "tilde valid",
                "data": {"tilde": 123},
                "valid": true
            },
            {
                "description": "percent valid",
                "data": {"percent": 123},
                "valid": true
            }
        ]
    },
    {
        "description": "nested refs",
        "schema": {
            "definitions": {
                "a": {"type": "integer"},
                "b": {"$ref": "#/definitions/a"},
                "c": {"$ref": "#/definitions/b"}
            },
            "$ref": "#/definitions/c"
        },
        "tests": [
            {
                "description": "nested ref valid",
                "data": 5,
                "valid": true
            },
            {
                "description": "nested ref invalid",
                "data": "a",
                "valid": false
            }
        ]
    },
    {
        "description": "ref overrides any sibling keywords",
        "schema": {
            "definitions": {
                "reffed": {
                    "type": "array"
                }
            },
            "properties": {
                "foo": {
                    "$ref": "#/definitions/reffed",
                    "maxItems": 2
                }
            }
        },
        "tests": [
            {
                "description": "remote ref valid",
                "data": { "foo": [] },
                "valid": true
            },
            {
                "description": "remote ref valid, maxItems ignored",
                "data": { "foo": [ 1, 2, 3] },
                "valid": true
            },
            {
                "description": "ref invalid",
                "data": { "foo": "string" },
                "valid": false
            }
        ]
    },
    {
        "description": "property named $ref, containing an actual $ref",
        "schema": {
            "properties": {
                "$ref": {"$ref": "#/definitions/is-string"}
            },
            "definitions": {
                "is-string": {
                    "type": "string"
                }
            }
        },
        "tests": [
            {
                "description": "property named $ref valid",
                "data": {"$ref": "a"},
                "valid": true
            },
            {
                "description": "property named $ref invalid",
                "data": {"$ref": 2},
                "valid": false
            }
        ]
    },
    {
        "description": "$ref prevents a sibling id from changing the base uri",
        "schema": {
            "id": "http://localhost:1234/sibling_id/base/",
            "definitions": {
                "foo": {
                    "id": "http://localhost:1234/sibling_id/foo.json",
                    "type": "string"
                },
                "base_foo": {
                    "$comment": "this canonical uri is http://localhost:1234/sibling_id/base/foo.json",
                    "id": "foo.json",
                    "type": "number"
                }
            },
            "extends": [
                {
                    "$comment": "$ref resolves to http://localhost:1234/sibling_id/base/foo.json, not http://localhost:1234/sibling_id/foo.json",
                    "id": "http://localhost:1234/sibling_id/",
                    "$ref": "foo.json"
                }
            ]
        },
        "tests": [
            {
                "description": "$ref resolves to /definitions/base_foo, data does not validate",
                "data": "a",
                "valid": false
            },
            {
                "description": "$ref resolves to /definitions/base_foo, data validates",
                "data": 1,
                "valid": true
            }
        ]
    },
    {
        "description": "remote ref, containing refs itself",
        "schema": {"$ref": "http://json-schema.org/draft-03/schema#"},
        "tests": [
            {
                "description": "remote ref valid",
                "data": {"items": {"type": "integer"}},
                "valid": true
            },
            {
                "description": "remote ref invalid",
                "data": {"items": {"type": 1}},
                "valid": false
            }
        ]
    },
    {
        "description": "naive replacement of $ref with its destination is not correct",
        "schema": {
            "definitions": {
                "a_string": { "type": "string" }
            },
            "enum": [
                { "$ref": "#/definitions/a_string" }
            ]
        },
        "tests": [
            {
                "description": "do not evaluate the $ref inside the enum, matching any string",
                "data": "this is a string",
                "valid": false
            },
            {
                "description": "match the enum exactly",
                "data": { "$ref": "#/definitions/a_string" },
                "valid": true
            }
        ]
    }
]