Example from specification fails with NPE

[olegshtch]

I've prepared test suite based on https://json-schema.org/draft/2020-12/json-schema-core.html#recursive-example in json-schema-org/JSON-Schema-Test-Suite#521

Currently it fails with NullPointerException:

java.lang.NullPointerException
	at net.jimblackler.jsonschemafriend.Validator.validate(Validator.java:95)
	at net.jimblackler.jsonschemafriend.Validator.validate(Validator.java:179)
	at net.jimblackler.jsonschemafriend.Validator.validate(Validator.java:76)
	at net.jimblackler.jsonschemafriend.Validator.validate(Validator.java:412)
	at net.jimblackler.jsonschemafriend.Validator.validate(Validator.java:76)
	at net.jimblackler.jsonschemafriend.Validator.validate(Validator.java:505)
	at net.jimblackler.jsonschemafriend.Validator.validate(Validator.java:156)
	at net.jimblackler.jsonschemafriend.Validator.validate(Validator.java:71)
	at net.jimblackler.jsonschemafriend.SuiteTest.lambda$scan$1(SuiteTest.java:100)

[jimblackler]

I tested it this way and it worked:

{
  "$defs": {
    "tree": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "$id": "https://example.com/tree",
      "$dynamicAnchor": "node",
      "type": "object",
      "properties": {
        "data": true,
        "children": {
          "type": "array",
          "items": {
            "$dynamicRef": "#node"
          }
        }
      }
    }
  },
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://example.com/strict-tree",
  "$dynamicAnchor": "node",
  "$ref": "tree",
  "unevaluatedProperties": false
}

{
    "children": [ { "daat": 1 } ]
}

But I will attempt to patch your test locally and see what happens.

[olegshtch]

Maybe it doesn't work because tree schema in other file.

[jimblackler]

Step one is to not NPE if $dynamicAnchor doesn't resolve, which is obviously bad. c2d871f

It doesn't fix your test case though so I'll look more into that.

[jimblackler]

OK the issue is the port spec in the URL http://localhost:1234/strict-tree.json. The library was mishandling those. e5d884a contains fixes for this specific test case (although it's possible there are more).