test: mock-support-server

Author: andreas-karlsson

mock-support-server/Dockerfile

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+FROM golang:1.24-alpine3.22 AS build
+WORKDIR /src/mock-support-server
+
+# Copy module files and download dependencies (cached)
+COPY mock-support-server/go.mod ./go.mod
+COPY mock-support-server/go.sum ./go.sum
+RUN --mount=type=cache,target=/go/pkg/mod \
+    go mod download
+
+# Copy sources (protos are already generated and checked in)
+COPY mock-support-server/main.go ./main.go
+COPY mock-support-server/genproto ./genproto
+
+# Build statically linked binary
+RUN --mount=type=cache,target=/go/pkg/mod \
+    --mount=type=cache,target=/root/.cache/go-build \
+    CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o /out/mock-support-server .
+
+FROM alpine:3.22
+COPY --from=build /out/mock-support-server /mock-support-server
+COPY data/account_id /data/account_id
+COPY data/resolver_state_current.pb /data/resolver_state_current.pb
+# Single unified port for HTTP+h2c (REST+gRPC)
+ENV PORT=8081
+EXPOSE 8081
+ENTRYPOINT ["/mock-support-server"]
+
+

mock-support-server/Makefile

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+PROTO_SRC := $(shell find proto/mock -type f -name '*.proto' | sort)
+GEN_DIR := genproto
+GOBIN := $(shell go env GOPATH)/bin
+
+.PHONY: gen run-iam clean
+
+gen: $(PROTO_SRC)
+	@mkdir -p $(GEN_DIR)
+	PATH="$(GOBIN):$$PATH" protoc -I proto \
+		--go_out=paths=source_relative:$(GEN_DIR) \
+		--go-grpc_out=paths=source_relative:$(GEN_DIR) \
+		--grpc-gateway_out=paths=source_relative,allow_delete_body=true:$(GEN_DIR) \
+		$(PROTO_SRC)
+
+run-iam: gen
+	go run -tags iamonly .
+
+clean:
+	rm -rf $(GEN_DIR)
+
+

mock-support-server/README.md

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+# Confidence Mock Support Server (Go)
+
+Single-binary mock of Confidence HTTP and gRPC backends for provider benchmarks and tests.
+
+## Features
+- HTTP endpoints:
+  - POST /v1/oauth/token → { accessToken, expiresIn }
+  - GET /v1/resolverState:resolverStateUri → { signedUri, account }
+  - GET /state.pb → serves resolver state bytes with ETag + 304
+  - POST /v1/flags:resolve → ResolveFlagsResponse (JSON)
+  - POST /v1/flagLogs:write → 200 OK (accepts application/x-protobuf)
+  - GET /healthz → 200 OK
+- gRPC endpoints:
+  - confidence.flags.admin.v1.ResolverStateService (ResolverStateUri, FullResolverState)
+  - confidence.flags.resolver.v1.InternalFlagLoggerService (WriteFlagLogs, WriteFlagAssigned)
+- One process, one container. No sidecars needed.
+
+Note: Public gRPC stubs for FlagResolverService are not generated here, so flags resolve is provided over HTTP only.
+
+## Configuration (env)
+- PORT_HTTP (default 8081)
+- PORT_GRPC (default 9091)
+- ACCOUNT_ID (default read from data/account_id)
+- RESOLVER_STATE_PB (default data/resolver_state_current.pb if present)
+- STATIC_TOKEN (default "mock-token")
+- TOKEN_EXPIRES_IN (default 3600)
+- FLAGS_RESPONSE_MODE (static|echo|file) [currently static]
+- STATIC_FLAG_VARIANT (default flags/foo/variants/default)
+- STATIC_FLAG_VALUE (default {"value":true})
+
+## Build and run
+
+Docker build:
+```bash
+docker build -f mock-support-server/Dockerfile -t cnfd-mock .
+```
+
+Run:
+```bash
+docker run --rm -p 8081:8081 -p 9091:9091 \
+  -e ACCOUNT_ID=test-account \
+  -e RESOLVER_STATE_PB=/data/resolver_state_current.pb \
+  cnfd-mock
+```
+
+## Using with JS benchmark
+- Override provider fetch to route Confidence hosts to http://mock:8081
+- Or run the benchmark container in a compose network and target `mock:8081`
+
+## Notes
+- Extend as needed to support additional endpoints or behaviors.
+- grpc-gateway can be added later if you want REST<->gRPC parity on one port.
+
+