[
  {
    "description": "$data - reference to the data object",
    "schemas": [
      { "$ref": "http://www.jsonscript.org/schema/schema.json#" },
      { "$ref": "http://www.jsonscript.org/schema/schema.json#$data" },
      { "$ref": "http://www.jsonscript.org/schema/schema_strict.json#" },
      { "$ref": "http://www.jsonscript.org/schema/schema_strict.json#$data" }
    ],
    "tests": [
      {
        "description": "value should be a valid JSON-pointer",
        "data": { "$data": "/foo/bar" },
        "valid": true
      },
      {
        "description": "value can be any valid script",
        "data": { "$data": { "$exec": "func" } },
        "valid": true
      },
      {
        "description": "value can be another $data instruction",
        "data": { "$data": { "$data": "/foo/bar" } },
        "valid": true
      },
      {
        "description": "if value is invalid script then invalid",
        "data": { "$data": { "$exec": "func", "extra": {} } },
        "valid": false
      }
    ]    
  },
  {
    "description": "$data syntax errors",
    "schemas": [
      { "$ref": "http://www.jsonscript.org/schema/schema.json#" },
      { "$ref": "http://www.jsonscript.org/schema/schema.json#$data" }
    ],
    "tests": [
      {
        "description": "relative JSON-pointer is invalid",
        "data": { "$data": "1/foo/bar" },
        "valid": true
      },
      {
        "description": "invalid JSON-pointer is invalid",
        "data": { "$data": "foo" },
        "valid": true
      },
      {
        "description": "$data is scalar but not a string is invalid",
        "data": { "$data": 1 },
        "valid": true
      }
    ]
  },
  {
    "description": "$data syntax errors with strict schema",
    "schemas": [
      { "$ref": "http://www.jsonscript.org/schema/schema_strict.json#" },
      { "$ref": "http://www.jsonscript.org/schema/schema_strict.json#$data" }
    ],
    "tests": [
      {
        "description": "relative JSON-pointer is invalid",
        "data": { "$data": "1/foo/bar" },
        "valid": false
      },
      {
        "description": "invalid JSON-pointer is invalid",
        "data": { "$data": "foo" },
        "valid": false
      },
      {
        "description": "$data is scalar but not a string is invalid",
        "data": { "$data": 1 },
        "valid": false
      }
    ]
  }
]