Request body JSON matcher (or custom matchers)

I want to create a mock that matches a request only if it has certain things in its JSON body (e.g. _.isMatch(request, partialContents)). The recently-added regex body matcher lets me match a single simple field in the body, but I want to match more complicated structures.

I can see three potential ways to be able to do this.

1. Have mockttp define such a matcher
2. Define my own custom matcher on the MockRuleBuilder
3. I could do something fancy in thenCallback, but this seems less clean

Are any of these possible?

[pimterry]

@hanvyj @drbr, it’s your lucky day: I had a little time spare this afternoon, so I’ve implemented withJsonBody (exact match) and withJsonBodyIncluding (fuzzy match).

See https://github.com/httptoolkit/mockttp/commit/d15316d9fae5a3765c017b02f299537935665a50 for full details. Now released as version 0.14.6, enjoy 😃.

[drbr]

@hanvyj Yep, that’s essentially the code I ended up writing. It’s working like a charm 😃

So, no need for the json or predicate matcher, but if it were available, I might eventually rewrite my code to use it.