JSON-RPC adapter issues

[jg-rp]

Early (maybe too early) testing of a JSON-RPC adapter for Python shows every spec failing with:

Error:    TypeError: DropProxy.wrap: cannot transport Liquid::Spec::LazySpec::SimpleFileSystem

before ever sending a render request. It looks like Liquid::Spec::JsonRpc#render's environment argument is receiving something other than variables with which to render the template.

If I temporarily skip environment wrapping by replacing wrapped_env = DropProxy.wrap(environment, @subprocess.drop_registry) with wrapped_env = environment, every spec fails with:

Error:    NoMethodError: undefined method '[]' for nil

before ever sending a render request. In this case Liquid::Spec::JsonRpc#serialize_render_options is expecting a hash but receiving nil.

Hacking past that by passing options || {} to serialize_render_options and inspecting my JSON-RPC server logs shows unexpected parameters for the render method. For example:

{
  "jsonrpc": "2.0",
  "id": 5,
  "method": "render",
  "params": {
    "template_id": {},
    "environment": {
      "registers": { "file_system": {} },
      "strict_errors": true
    },
    "options": { "strict_errors": false },
    "frozen_time": "2024-01-01T00:01:58Z"
  }
}

and

{
  "jsonrpc": "2.0",
  "id": 21,
  "method": "render",
  "params": {
    "template_id": { "v": null },
    "environment": {
      "registers": {
        "file_system": "#<Liquid::Spec::LazySpec::SimpleFileSystem:0x00007f6a84823fe8>"
      },
      "strict_errors": true
    },
    "options": {},
    "frozen_time": "2024-01-01T00:01:58Z"
  }
}

Every template_id is an object where I was expecting a string value. And environment does indeed contain things that don't look right.