Hi! I have a question about struct matching, and I'm feeling kind of stumped. I have a proto with a

struct

field, e.g.

message Request {
  string name = 1;
  google.protobuf.Struct params = 2;
}

In my test, I am creating a new struct

params, err := structpb.NewStruct(map[string]any{"kind": "general", "message": "test" })

and then marshaling it to JSON. The string I am passing to

withContents

looks like this

{
  "pact:proto": "whatever.proto",
  "pact:proto-service": "Service/Endpoint",
  "pact:content-type": "application/protobuf",
  "request": {
    "name": "name",
    "params": {
      "kind": "general",
      "message": "test"
    }
  },
  "response": {
    "responses": [
      {
        "success": true,
        "id": "test123"
      }
    ]
  }
}

I run the test once and get this error

Received generate templates error rpc error: code = FailedPrecondition desc = Failed to match the request message - BodyMismatches({"$.params": [BodyMismatch { path: "$.params.fields.key", expected: Some(b"\"message\""), actual: Some(b"\"kind\""), mismatch: "Expected 'kind' (String) to be equal to 'message' (String)" }, BodyMismatch { path: "$.params.fields.value.string_value", expected: Some(b"\"test\""), actual: Some(b"\"general\""), mismatch: "Expected 'general' (String) to be equal to 'test' (String)" }]})

and then I run the test again (changing nothing, with exact same contents string) and it passes

Yeah, it looks like it is getting confused, as I think a google.protobuf.Struct is implemented as a union type or an enum. It may need special handling.

Does anyone have any suggestions for how to handle this? I did a preliminary dive into the

matching

code but didn't get very far. I also looked into the matching docs to see if there was something I could use there, but it seems like that's geared more towards primitives. We have a bunch of teams using

google.protobuf.Struct

in their proto files, so this is a pretty big blocker for us 😕

Sorry, I have been dealing with the provider state issue with the gRPC plugin. I'll investigate this for you, but I probably won't get to it before early next week.

Mind raising an issue on https://github.com/pactflow/pact-protobuf-plugin/ Becca for us to investigate please?

Oh ya, sometime in the next few weeks is totally fine! Right now I'm able to get away with using a struct with only a single field – no ordering problems there 😂 And happy to raise an issue – thanks both for being so responsive! I'll link it here once I create it