[
    {
        "description": "root pointer ref",
        "schema": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "properties": {
                "foo": {"$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": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "properties": {
                "foo": {"type": "integer"},
                "bar": {"$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": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "prefixItems": [
                {"type": "integer"},
                {"$ref": "#/prefixItems/0"}
            ]
        },
        "tests": [
            {
                "description": "match array",
                "data": [1, 2],
                "valid": true
            },
            {
                "description": "mismatch array",
                "data": [1, "foo"],
                "valid": false
            }
        ]
    },
    {
        "description": "escaped pointer ref",
        "schema": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$defs": {
                "tilde~field": {"type": "integer"},
                "slash/field": {"type": "integer"},
                "percent%field": {"type": "integer"}
            },
            "properties": {
                "tilde": {"$ref": "#/$defs/tilde~0field"},
                "slash": {"$ref": "#/$defs/slash~1field"},
                "percent": {"$ref": "#/$defs/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": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$defs": {
                "a": {"type": "integer"},
                "b": {"$ref": "#/$defs/a"},
                "c": {"$ref": "#/$defs/b"}
            },
            "$ref": "#/$defs/c"
        },
        "tests": [
            {
                "description": "nested ref valid",
                "data": 5,
                "valid": true
            },
            {
                "description": "nested ref invalid",
                "data": "a",
                "valid": false
            }
        ]
    },
    {
        "description": "ref applies alongside sibling keywords",
        "schema": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$defs": {
                "reffed": {
                    "type": "array"
                }
            },
            "properties": {
                "foo": {
                    "$ref": "#/$defs/reffed",
                    "maxItems": 2
                }
            }
        },
        "tests": [
            {
                "description": "ref valid, maxItems valid",
                "data": { "foo": [] },
                "valid": true
            },
            {
                "description": "ref valid, maxItems invalid",
                "data": { "foo": [1, 2, 3] },
                "valid": false
            },
            {
                "description": "ref invalid",
                "data": { "foo": "string" },
                "valid": false
            }
        ]
    },
    {
        "description": "remote ref, containing refs itself",
        "schema": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$ref": "https://json-schema.org/draft/2020-12/schema"
        },
        "tests": [
            {
                "description": "remote ref valid",
                "data": {"minLength": 1},
                "valid": true
            },
            {
                "description": "remote ref invalid",
                "data": {"minLength": -1},
                "valid": false
            }
        ]
    },
    {
        "description": "property named $ref that is not a reference",
        "schema": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "properties": {
                "$ref": {"type": "string"}
            }
        },
        "tests": [
            {
                "description": "property named $ref valid",
                "data": {"$ref": "a"},
                "valid": true
            },
            {
                "description": "property named $ref invalid",
                "data": {"$ref": 2},
                "valid": false
            }
        ]
    },
    {
        "description": "property named $ref, containing an actual $ref",
        "schema": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "properties": {
                "$ref": {"$ref": "#/$defs/is-string"}
            },
            "$defs": {
                "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": "$ref to boolean schema true",
        "schema": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$ref": "#/$defs/bool",
            "$defs": {
                "bool": true
            }
        },
        "tests": [
            {
                "description": "any value is valid",
                "data": "foo",
                "valid": true
            }
        ]
    },
    {
        "description": "$ref to boolean schema false",
        "schema": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$ref": "#/$defs/bool",
            "$defs": {
                "bool": false
            }
        },
        "tests": [
            {
                "description": "any value is invalid",
                "data": "foo",
                "valid": false
            }
        ]
    },
    {
        "description": "Recursive references between schemas",
        "schema": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$id": "http://localhost:1234/draft2020-12/tree",
            "description": "tree of nodes",
            "type": "object",
            "properties": {
                "meta": {"type": "string"},
                "nodes": {
                    "type": "array",
                    "items": {"$ref": "node"}
                }
            },
            "required": ["meta", "nodes"],
            "$defs": {
                "node": {
                    "$id": "http://localhost:1234/draft2020-12/node",
                    "description": "node",
                    "type": "object",
                    "properties": {
                        "value": {"type": "number"},
                        "subtree": {"$ref": "tree"}
                    },
                    "required": ["value"]
                }
            }
        },
        "tests": [
            {
                "description": "valid tree",
                "data": {
                    "meta": "root",
                    "nodes": [
                        {
                            "value": 1,
                            "subtree": {
                                "meta": "child",
                                "nodes": [
                                    {"value": 1.1},
                                    {"value": 1.2}
                                ]
                            }
                        },
                        {
                            "value": 2,
                            "subtree": {
                                "meta": "child",
                                "nodes": [
                                    {"value": 2.1},
                                    {"value": 2.2}
                                ]
                            }
                        }
                    ]
                },
                "valid": true
            },
            {
                "description": "invalid tree",
                "data": {
                    "meta": "root",
                    "nodes": [
                        {
                            "value": 1,
                            "subtree": {
                                "meta": "child",
                                "nodes": [
                                    {"value": "string is invalid"},
                                    {"value": 1.2}
                                ]
                            }
                        },
                        {
                            "value": 2,
                            "subtree": {
                                "meta": "child",
                                "nodes": [
                                    {"value": 2.1},
                                    {"value": 2.2}
                                ]
                            }
                        }
                    ]
                },
                "valid": false
            }
        ]
    },
    {
        "description": "refs with quote",
        "schema": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "properties": {
                "foo\"bar": {"$ref": "#/$defs/foo%22bar"}
            },
            "$defs": {
                "foo\"bar": {"type": "number"}
            }
        },
        "tests": [
            {
                "description": "object with numbers is valid",
                "data": {
                    "foo\"bar": 1
                },
                "valid": true
            },
            {
                "description": "object with strings is invalid",
                "data": {
                    "foo\"bar": "1"
                },
                "valid": false
            }
        ]
    },
    {
        "description": "ref creates new scope when adjacent to keywords",
        "schema": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$defs": {
                "A": {
                    "unevaluatedProperties": false
                }
            },
            "properties": {
                "prop1": {
                    "type": "string"
                }
            },
            "$ref": "#/$defs/A"
        },
        "tests": [
            {
                "description": "referenced subschema doesn't see annotations from properties",
                "data": {
                    "prop1": "match"
                },
                "valid": false
            }
        ]
    },
    {
        "description": "naive replacement of $ref with its destination is not correct",
        "schema": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$defs": {
                "a_string": { "type": "string" }
            },
            "enum": [
                { "$ref": "#/$defs/a_string" }
            ]
        },
        "tests": [
            {
                "description": "do not evaluate the $ref inside the enum, matching any string",
                "data": "this is a string",
                "valid": false
            },
            {
                "description": "do not evaluate the $ref inside the enum, definition exact match",
                "data": { "type": "string" },
                "valid": false
            },
            {
                "description": "match the enum exactly",
                "data": { "$ref": "#/$defs/a_string" },
                "valid": true
            }
        ]
    },
    {
        "description": "refs with relative uris and defs",
        "schema": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$id": "http://example.com/schema-relative-uri-defs1.json",
            "properties": {
                "foo": {
                    "$id": "schema-relative-uri-defs2.json",
                    "$defs": {
                        "inner": {
                            "properties": {
                                "bar": { "type": "string" }
                            }
                        }
                    },
                    "$ref": "#/$defs/inner"
                }
            },
            "$ref": "schema-relative-uri-defs2.json"
        },
        "tests": [
            {
                "description": "invalid on inner field",
                "data": {
                    "foo": {
                        "bar": 1
                    },
                    "bar": "a"
                },
                "valid": false
            },
            {
                "description": "invalid on outer field",
                "data": {
                    "foo": {
                        "bar": "a"
                    },
                    "bar": 1
                },
                "valid": false
            },
            {
                "description": "valid on both fields",
                "data": {
                    "foo": {
                        "bar": "a"
                    },
                    "bar": "a"
                },
                "valid": true
            }
        ]
    },
    {
        "description": "relative refs with absolute uris and defs",
        "schema": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$id": "http://example.com/schema-refs-absolute-uris-defs1.json",
            "properties": {
                "foo": {
                    "$id": "http://example.com/schema-refs-absolute-uris-defs2.json",
                    "$defs": {
                        "inner": {
                            "properties": {
                                "bar": { "type": "string" }
                            }
                        }
                    },
                    "$ref": "#/$defs/inner"
                }
            },
            "$ref": "schema-refs-absolute-uris-defs2.json"
        },
        "tests": [
            {
                "description": "invalid on inner field",
                "data": {
                    "foo": {
                        "bar": 1
                    },
                    "bar": "a"
                },
                "valid": false
            },
            {
                "description": "invalid on outer field",
                "data": {
                    "foo": {
                        "bar": "a"
                    },
                    "bar": 1
                },
                "valid": false
            },
            {
                "description": "valid on both fields",
                "data": {
                    "foo": {
                        "bar": "a"
                    },
                    "bar": "a"
                },
                "valid": true
            }
        ]
    },
    {
        "description": "$id must be resolved against nearest parent, not just immediate parent",
        "schema": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$id": "http://example.com/a.json",
            "$defs": {
                "x": {
                    "$id": "http://example.com/b/c.json",
                    "not": {
                        "$defs": {
                            "y": {
                                "$id": "d.json",
                                "type": "number"
                            }
                        }
                    }
                }
            },
            "allOf": [
                {
                    "$ref": "http://example.com/b/d.json"
                }
            ]
        },
        "tests": [
            {
                "description": "number is valid",
                "data": 1,
                "valid": true
            },
            {
                "description": "non-number is invalid",
                "data": "a",
                "valid": false
            }
        ]
    },
    {
        "description": "order of evaluation: $id and $ref",
        "schema": {
            "$comment": "$id must be evaluated before $ref to get the proper $ref destination",
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$id": "/draft2020-12/ref-and-id1/base.json",
            "$ref": "int.json",
            "$defs": {
                "bigint": {
                    "$comment": "canonical uri: /ref-and-id1/int.json",
                    "$id": "int.json",
                    "maximum": 10
                },
                "smallint": {
                    "$comment": "canonical uri: /ref-and-id1-int.json",
                    "$id": "/draft2020-12/ref-and-id1-int.json",
                    "maximum": 2
                }
            }
        },
        "tests": [
            {
                "description": "data is valid against first definition",
                "data": 5,
                "valid": true
            },
            {
                "description": "data is invalid against first definition",
                "data": 50,
                "valid": false
            }
        ]
    },
    {
        "description": "order of evaluation: $id and $anchor and $ref",
        "schema": {
            "$comment": "$id must be evaluated before $ref to get the proper $ref destination",
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$id": "/draft2020-12/ref-and-id2/base.json",
            "$ref": "#bigint",
            "$defs": {
                "bigint": {
                    "$comment": "canonical uri: /ref-and-id2/base.json#/$defs/bigint; another valid uri for this location: /ref-and-id2/base.json#bigint",
                    "$anchor": "bigint",
                    "maximum": 10
                },
                "smallint": {
                    "$comment": "canonical uri: /ref-and-id2#/$defs/smallint; another valid uri for this location: /ref-and-id2/#bigint",
                    "$id": "/draft2020-12/ref-and-id2/",
                    "$anchor": "bigint",
                    "maximum": 2
                }
            }
        },
        "tests": [
            {
                "description": "data is valid against first definition",
                "data": 5,
                "valid": true
            },
            {
                "description": "data is invalid against first definition",
                "data": 50,
                "valid": false
            }
        ]
    },
    {
        "description": "simple URN base URI with $ref via the URN",
        "schema": {
            "$comment": "URIs do not have to have HTTP(s) schemes",
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$id": "urn:uuid:deadbeef-1234-ffff-ffff-4321feebdaed",
            "minimum": 30,
            "properties": {
                "foo": {"$ref": "urn:uuid:deadbeef-1234-ffff-ffff-4321feebdaed"}
            }
        },
        "tests": [
            {
                "description": "valid under the URN IDed schema",
                "data": {"foo": 37},
                "valid": true
            },
            {
                "description": "invalid under the URN IDed schema",
                "data": {"foo": 12},
                "valid": false
            }
        ]
    },
    {
        "description": "simple URN base URI with JSON pointer",
        "schema": {
            "$comment": "URIs do not have to have HTTP(s) schemes",
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$id": "urn:uuid:deadbeef-1234-00ff-ff00-4321feebdaed",
            "properties": {
                "foo": {"$ref": "#/$defs/bar"}
            },
            "$defs": {
                "bar": {"type": "string"}
            }
        },
        "tests": [
            {
                "description": "a string is valid",
                "data": {"foo": "bar"},
                "valid": true
            },
            {
                "description": "a non-string is invalid",
                "data": {"foo": 12},
                "valid": false
            }
        ]
    },
    {
        "description": "URN base URI with NSS",
        "schema": {
            "$comment": "RFC 8141 §2.2",
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$id": "urn:example:1/406/47452/2",
            "properties": {
                "foo": {"$ref": "#/$defs/bar"}
            },
            "$defs": {
                "bar": {"type": "string"}
            }
        },
        "tests": [
            {
                "description": "a string is valid",
                "data": {"foo": "bar"},
                "valid": true
            },
            {
                "description": "a non-string is invalid",
                "data": {"foo": 12},
                "valid": false
            }
        ]
    },
    {
        "description": "URN base URI with r-component",
        "schema": {
            "$comment": "RFC 8141 §2.3.1",
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$id": "urn:example:foo-bar-baz-qux?+CCResolve:cc=uk",
            "properties": {
                "foo": {"$ref": "#/$defs/bar"}
            },
            "$defs": {
                "bar": {"type": "string"}
            }
        },
        "tests": [
            {
                "description": "a string is valid",
                "data": {"foo": "bar"},
                "valid": true
            },
            {
                "description": "a non-string is invalid",
                "data": {"foo": 12},
                "valid": false
            }
        ]
    },
    {
        "description": "URN base URI with q-component",
        "schema": {
            "$comment": "RFC 8141 §2.3.2",
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$id": "urn:example:weather?=op=map&lat=39.56&lon=-104.85&datetime=1969-07-21T02:56:15Z",
            "properties": {
                "foo": {"$ref": "#/$defs/bar"}
            },
            "$defs": {
                "bar": {"type": "string"}
            }
        },
        "tests": [
            {
                "description": "a string is valid",
                "data": {"foo": "bar"},
                "valid": true
            },
            {
                "description": "a non-string is invalid",
                "data": {"foo": 12},
                "valid": false
            }
        ]
    },
    {
        "description": "URN base URI with f-component",
        "schema": {
            "$comment": "RFC 8141 §2.3.3, but we don't allow fragments",
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$ref": "https://json-schema.org/draft/2020-12/schema"
        },
        "tests": [
            {
                "description": "is invalid",
                "data": {"$id": "urn:example:foo-bar-baz-qux#somepart"},
                "valid": false
            }
        ]
    },
    {
        "description": "URN base URI with URN and JSON pointer ref",
        "schema": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$id": "urn:uuid:deadbeef-1234-0000-0000-4321feebdaed",
            "properties": {
                "foo": {"$ref": "urn:uuid:deadbeef-1234-0000-0000-4321feebdaed#/$defs/bar"}
            },
            "$defs": {
                "bar": {"type": "string"}
            }
        },
        "tests": [
            {
                "description": "a string is valid",
                "data": {"foo": "bar"},
                "valid": true
            },
            {
                "description": "a non-string is invalid",
                "data": {"foo": 12},
                "valid": false
            }
        ]
    },
    {
        "description": "URN base URI with URN and anchor ref",
        "schema": {
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "$id": "urn:uuid:deadbeef-1234-ff00-00ff-4321feebdaed",
            "properties": {
                "foo": {"$ref": "urn:uuid:deadbeef-1234-ff00-00ff-4321feebdaed#something"}
            },
            "$defs": {
                "bar": {
                    "$anchor": "something",
                    "type": "string"
                }
            }
        },
        "tests": [
            {
                "description": "a string is valid",
                "data": {"foo": "bar"},
                "valid": true
            },
            {
                "description": "a non-string is invalid",
                "data": {"foo": 12},
                "valid": false
            }
        ]
    },
    {
        "description": "URN ref with nested pointer ref",
        "schema": {
            "$ref": "urn:uuid:deadbeef-4321-ffff-ffff-1234feebdaed",
            "$defs": {
                "foo": {
                    "$id": "urn:uuid:deadbeef-4321-ffff-ffff-1234feebdaed",
                    "$defs": {"bar": {"type": "string"}},
                    "$ref": "#/$defs/bar"
                }
            }
        },
        "tests": [
            {
                "description": "a string is valid",
                "data": "bar",
                "valid": true
            },
            {
                "description": "a non-string is invalid",
                "data": 12,
                "valid": false
            }
        ]
    }
]