Produce JSON fixtures to test rendering of visual features

[kd-ods]

For each of the visual features produced when processing an array of JSON objects (and for combinations of features), it's possible to create a sets of minimal JSON code to test the visual output for conformance. (Basically: JSON fixtures.) As an example:

[
  {
    "recordType": "entity"
  }
]

...is one chunk of JSON that tests the minimal conditions under which a basic entity node is drawn.

The visual output could be checked by eye, for conformance with the spec. Or automated visual regression testing might be implemented at some point.

Producing this JSON code to test the existing spec would be a few days' work. It would contribute to a more robust testing framework for the tool.