[299] Add tests for invalid use of fragments in "$id"

Author: ssilverman

tests/draft2019-09/ref.json

@@ -273,7 +273,7 @@
         "tests": [
             {
                 "description": "valid tree",
-                "data": { 
+                "data": {
                     "meta": "root",
                     "nodes": [
                         {
@@ -302,7 +302,7 @@
             },
             {
                 "description": "invalid tree",
-                "data": { 
+                "data": {
                     "meta": "root",
                     "nodes": [
                         {
@@ -358,6 +358,102 @@
             }
         ]
     },
+    {
+        "description": "Invalid use of fragments in location-independent $id",
+        "schema": {"$ref": "https://json-schema.org/draft/2019-09/schema"},
+        "tests": [
+            {
+                "description": "Identifier name",
+                "data": {
+                    "$ref": "#foo",
+                    "$defs": {
+                        "A": {
+                            "$id": "#foo",
+                            "type": "integer"
+                        }
+                    }
+                },
+                "valid": false
+            },
+            {
+                "description": "Identifier path",
+                "data": {
+                    "$ref": "#/a/b",
+                    "$defs": {
+                        "A": {
+                            "$id": "#/a/b",
+                            "type": "integer"
+                        }
+                    }
+                },
+                "valid": false
+            },
+            {
+                "description": "Identifier name with absolute URI",
+                "data": {
+                    "$ref": "http://localhost:1234/bar#foo",
+                    "$defs": {
+                        "A": {
+                            "$id": "http://localhost:1234/bar#foo",
+                            "type": "integer"
+                        }
+                    }
+                },
+                "valid": false
+            },
+            {
+                "description": "Identifier path with absolute URI",
+                "data": {
+                    "$ref": "http://localhost:1234/bar#/a/b",
+                    "$defs": {
+                        "A": {
+                            "$id": "http://localhost:1234/bar#/a/b",
+                            "type": "integer"
+                        }
+                    }
+                },
+                "valid": false
+            },
+            {
+                "description": "Identifier name with base URI change in subschema",
+                "data": {
+                    "$id": "http://localhost:1234/root",
+                    "$ref": "http://localhost:1234/nested.json#foo",
+                    "$defs": {
+                        "A": {
+                            "$id": "nested.json",
+                            "$defs": {
+                                "B": {
+                                    "$id": "#foo",
+                                    "type": "integer"
+                                }
+                            }
+                        }
+                    }
+                },
+                "valid": false
+            },
+            {
+                "description": "Identifier path with base URI change in subschema",
+                "data": {
+                    "$id": "http://localhost:1234/root",
+                    "$ref": "http://localhost:1234/nested.json#/a/b",
+                    "$defs": {
+                        "A": {
+                            "$id": "nested.json",
+                            "$defs": {
+                                "B": {
+                                    "$id": "#/a/b",
+                                    "type": "integer"
+                                }
+                            }
+                        }
+                    }
+                },
+                "valid": false
+            }
+        ]
+    },
     {
         "description": "ref creates new scope when adjacent to keywords",
         "schema": {