Today I started working on the update tests for Micropub.rocks. There is a bit more involved with these tests than tests for simpler things like creating posts, since the site has to create a dummy post that can be edited.
When you first visit the update test page, it will create a post and store it internally.
Your client can (but doesn't have to in order to pass the test) query the Micropub endpoint to request the source properties.
Your client then sends the request to add the "foo" property:
And watch as the test page updates with the new post!
Now that I have this infrastructure in place for caching the post internally, and responding to source queries, the rest of the update tests should go quickly!