Nodeinfo tests?

[jernst]

Should we test that as well? If so, what needs testing?

[steve-bate]

It should probably be tested if it's supported by an implementation. The primary use case is for aggregating instance statistics and high-level metadata (for fediverse crawlers). It's not required for federation per se and a nontrivial number of instances do not support it.

Possible tests:

• Correct content-type for the JRD and the version-specific nodeinfo data.
• Validate nodeinfo response per the version-specific nodeinfo JSON Schema
• Check that a server can handle non-nodeinfo links in the nodeinfo JRD (e.g., "application actor" links).

My guess is that a majority of instances will fail one or more of these tests. Possible failure cases:

• Uses application/json for JRD
• Adds values for properties like protocol that are not valid per the schemas
• Assumes nodeinfo JRD only contains nodeinfo links.