I’m struggling to express the correct grpc interaction message in my test. With a proto file containing this:

service LanguageRuntime {
    // About returns information about the runtime for this language.
    rpc About(google.protobuf.Empty) returns (AboutResponse) {}
}

// AboutResponse returns runtime information about the language.
message AboutResponse {
    string executable = 1; // the primary executable for the runtime of this language.
    string version = 2; // the version of the runtime for this language.
    map<string, string> metadata = 3; // other information about this language.
}

I have this as my

grpcInteration

object so far:

grpcInteraction := `{
		"pact:proto": "` + filepath.ToSlash(dir) + `",
		"pact:proto-service": "LanguageRuntime/About",
		"pact:content-type": "application/protobuf",
		"request": {
		},
		"response": {
			"executable": "matching(type, 'pulumi')",
			"version": "matching(type, '3.48.0')",
			"metadata": {
				"matching(type, 'someKey')": "matching(type, 'somevalue')"
			}
		}
	}`

The error I get is this, and I get head nor tail to it:

2022-12-13T14:51:19.060937Z ERROR ThreadId(01) pact_ffi::plugins: Failed to call out to plugin - Request to configure interaction failed: Failed to process protobuf: For message fields, you need to define a Map of expected fields, got String("matching(type, 'somevalue')")

I tried various things already for the free form

metadata

field so far, but to no avail. I haven’t found any example which has a

map

in the proto file that I can copy from. What is the correct way to write this?

I'll play around with it, see what is going on

Code updated.