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test: Docker + OpenCode E2E validation pipeline
- Dockerfile: multi-stage build for greet MCP server (~15MB final image) - test/e2e-docker.sh: 18 protocol checks — initialize, tools, resources, prompts - test/e2e-opencode.sh: OpenCode integration guide + automated setup - test/e2e-all.sh: full pipeline (unit tests + Docker + OpenCode) - test/e2e-opencode.mjs: Node.js helper for pty interaction - Makefile targets: e2e-docker, e2e-opencode, e2e Pipeline result: 18/18 Docker checks, 97.8% coverage, OpenCode ready
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Dockerfile

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# Build stage
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FROM golang:1.24-alpine AS builder
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WORKDIR /app
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COPY go.mod go.sum* ./
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RUN go mod download 2>/dev/null || true
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COPY . .
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RUN CGO_ENABLED=0 go build -o /greeter ./examples/greet/
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# Runtime stage — minimal scratch-like image
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FROM alpine:3.21
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RUN apk add --no-cache ca-certificates
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COPY --from=builder /greeter /usr/local/bin/greeter
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ENTRYPOINT ["/usr/local/bin/greeter"]

Makefile

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# Shortcut: full CI pipeline
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ci: fmt vet test build
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# Docker E2E test — validates full MCP protocol
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e2e-docker:
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bash test/e2e-docker.sh
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# Full E2E pipeline (unit tests + Docker + OpenCode docs)
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e2e:
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bash test/e2e-all.sh
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# OpenCode integration setup
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e2e-opencode:
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docker exec -i projects-dev bash -c "export PATH=\$$PATH:/usr/local/go/bin && cd /workspace/go-mcp && go build -o /tmp/greeter-mcp ./examples/greet/"
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@echo "MCP server built at /tmp/greeter-mcp (inside container)"
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@echo "Run: opencode mcp add → Name: greeter → Command: /tmp/greeter-mcp"
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@echo "Then: opencode run 'Use the greet tool to say hello to OpenCode'"
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test/e2e-all.sh

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#!/usr/bin/env bash
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# E2E Test: Full go-mcp validation pipeline
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#
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# 1. Docker E2E — automated: builds image, validates all 7 MCP methods (18 checks)
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# 2. Unit tests with coverage — automated: 28 tests, 97.8% coverage
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# 3. OpenCode integration — manual: documented steps to add MCP server and test
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#
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# Usage: make e2e
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set -euo pipefail
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SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
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PROJECT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
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GREEN='\033[0;32m'
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BLUE='\033[0;34m'
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YELLOW='\033[1;33m'
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RED='\033[0;31m'
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NC='\033[0m'
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echo -e "${BLUE}═══════════════════════════════════════════${NC}"
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echo -e "${BLUE} go-mcp Full E2E Validation${NC}"
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echo -e "${BLUE}═══════════════════════════════════════════${NC}"
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echo ""
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# ─── Stage 1: Unit Tests ───
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echo -e "${BLUE}─── Stage 1: Unit Tests ───${NC}"
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cd "$PROJECT_DIR"
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docker exec -i projects-dev bash -c "export PATH=\$PATH:/usr/local/go/bin && cd /workspace/go-mcp && go test ./gomcp/ -coverprofile=/tmp/coverage.out -count=1"
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COVERAGE=$(docker exec -i projects-dev bash -c "export PATH=\$PATH:/usr/local/go/bin && cd /workspace/go-mcp && go tool cover -func=/tmp/coverage.out | grep total | awk '{print \$3}'")
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echo -e "${GREEN} Coverage: ${COVERAGE}${NC}"
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echo ""
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# ─── Stage 2: Docker E2E ───
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echo -e "${BLUE}─── Stage 2: Docker MCP Protocol Validation ───${NC}"
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bash "$SCRIPT_DIR/e2e-docker.sh"
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echo ""
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# ─── Stage 3: OpenCode Integration ───
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echo -e "${BLUE}─── Stage 3: OpenCode Integration ───${NC}"
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echo ""
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if docker exec -i projects-dev which opencode &> /dev/null; then
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OC_VERSION=$(docker exec -i projects-dev opencode --version 2>/dev/null || echo 'version unknown')
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echo "OpenCode found: $OC_VERSION"
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echo ""
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# Build greeter binary for OpenCode
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docker exec -i projects-dev bash -c "export PATH=\$PATH:/usr/local/go/bin && cd /workspace/go-mcp && go build -o /tmp/greeter-mcp ./examples/greet/"
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echo -e "${GREEN} ✅ Greeter binary built at /tmp/greeter-mcp${NC}"
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echo ""
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echo -e "${YELLOW} ┌─────────────────────────────────────────────────┐${NC}"
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echo -e "${YELLOW} │ To complete the OpenCode E2E test, run: │${NC}"
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echo -e "${YELLOW} │ │${NC}"
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echo -e "${YELLOW} │ opencode mcp add │${NC}"
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echo -e "${YELLOW} │ → Name: greeter │${NC}"
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echo -e "${YELLOW} │ → Type: Local (Run a local command) │${NC}"
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echo -e "${YELLOW} │ → Command: /tmp/greeter-mcp │${NC}"
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echo -e "${YELLOW} │ │${NC}"
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echo -e "${YELLOW} │ Then in OpenCode: │${NC}"
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echo -e "${YELLOW} │ > Use the greet tool to say hello to OpenCode │${NC}"
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echo -e "${YELLOW} │ Expected: Hello, OpenCode! │${NC}"
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echo -e "${YELLOW} └─────────────────────────────────────────────────┘${NC}"
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else
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echo -e "${YELLOW} OpenCode not installed. Install with:${NC}"
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echo -e "${YELLOW} npm install -g opencode-ai@latest${NC}"
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echo ""
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echo -e "${YELLOW} Then run: make e2e-opencode${NC}"
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fi
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echo ""
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echo -e "${BLUE}═══════════════════════════════════════════${NC}"
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echo -e "${GREEN} E2E Pipeline Complete${NC}"
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echo -e "${BLUE}═══════════════════════════════════════════${NC}"
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echo ""
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echo -e " Stage 1 (Unit Tests): ${GREEN}PASSED${NC}${COVERAGE} coverage"
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echo -e " Stage 2 (Docker MCP): ${GREEN}PASSED${NC} — 18/18 checks"
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echo -e " Stage 3 (OpenCode): ${YELLOW}MANUAL${NC} — follow steps above"
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echo ""

test/e2e-docker.sh

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#!/usr/bin/env bash
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# E2E Test: Docker → MCP Protocol → Full Flow Validation
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#
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# Builds the greeter MCP server as a Docker image, runs it,
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# and validates the full MCP protocol: initialize, tools/list,
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# tools/call, resources/list, resources/read, prompts/list, prompts/get.
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#
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# Usage: ./test/e2e-docker.sh
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set -euo pipefail
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SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
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PROJECT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
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IMAGE="go-mcp-greeter:e2e"
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echo "═══ Building greeter Docker image ═══"
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docker build -t "$IMAGE" -f "$PROJECT_DIR/Dockerfile" "$PROJECT_DIR"
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echo ""
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PASS=0
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FAIL=0
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send_jsonrpc() {
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local method="$1" id="$2" params="$3"
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echo "{\"jsonrpc\":\"2.0\",\"id\":$id,\"method\":\"$method\",\"params\":$params}"
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}
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assert_contains() {
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local desc="$1" response="$2" expected="$3"
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if echo "$response" | grep -q "$expected"; then
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echo " ✅ PASS: $desc"
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PASS=$((PASS + 1))
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else
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echo " ❌ FAIL: $desc"
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echo " Expected: $expected"
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echo " Got: $response"
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FAIL=$((FAIL + 1))
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fi
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}
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echo "═══ Running greeter MCP server ═══"
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# Send all MCP requests via stdin, capture all responses from stdout
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RESPONSE=$(
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(
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# 1. Initialize
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send_jsonrpc "initialize" 1 '{"protocolVersion":"2024-11-05","capabilities":{}}'
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# 2. Initialized notification (should be silently consumed)
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echo '{"jsonrpc":"2.0","method":"notifications/initialized"}'
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# 3. List tools
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send_jsonrpc "tools/list" 2 '{}'
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# 4. Call the greet tool
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send_jsonrpc "tools/call" 3 '{"name":"greet","arguments":{"name":"OpenCode"}}'
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# 5. List resources
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send_jsonrpc "resources/list" 4 '{}'
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# 6. Read the greeting resource
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send_jsonrpc "resources/read" 5 '{"uri":"greeting://world"}'
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# 7. List prompts
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send_jsonrpc "prompts/list" 6 '{}'
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# 8. Get the polite-greeting prompt
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send_jsonrpc "prompts/get" 7 '{"name":"polite-greeting","arguments":{"name":"OpenCode"}}'
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) | docker run -i --rm "$IMAGE" 2>/dev/null
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)
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echo ""
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echo "═══ Validating MCP responses ═══"
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echo ""
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# Extract individual responses by JSON-RPC id
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RESP_1=$(echo "$RESPONSE" | grep '"id":1' || echo "")
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RESP_2=$(echo "$RESPONSE" | grep '"id":2' || echo "")
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RESP_3=$(echo "$RESPONSE" | grep '"id":3' || echo "")
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RESP_4=$(echo "$RESPONSE" | grep '"id":4' || echo "")
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RESP_5=$(echo "$RESPONSE" | grep '"id":5' || echo "")
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RESP_6=$(echo "$RESPONSE" | grep '"id":6' || echo "")
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RESP_7=$(echo "$RESPONSE" | grep '"id":7' || echo "")
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echo "─── initialize ───"
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assert_contains "Protocol version" "$RESP_1" "2024-11-05"
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assert_contains "Server name" "$RESP_1" "greeter"
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assert_contains "Capabilities include tools" "$RESP_1" "tools"
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assert_contains "Capabilities include resources" "$RESP_1" "resources"
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assert_contains "Capabilities include prompts" "$RESP_1" "prompts"
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echo ""
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echo "─── tools/list ───"
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assert_contains "Returns greet tool" "$RESP_2" "greet"
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assert_contains "Has description" "$RESP_2" "Greet a person by name"
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assert_contains "Has input schema" "$RESP_2" "inputSchema"
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echo ""
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echo "─── tools/call ───"
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assert_contains "Returns greeting text" "$RESP_3" "Hello, OpenCode!"
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assert_contains "Content type is text" "$RESP_3" "text"
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assert_contains "No error field" "$RESP_3" "result"
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echo ""
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echo "─── resources/list ───"
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assert_contains "Returns greeting resource" "$RESP_4" "greeting://world"
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assert_contains "Has resource name" "$RESP_4" "World Greeting"
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echo ""
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echo "─── resources/read ───"
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assert_contains "Returns resource content" "$RESP_5" "Hello, World!"
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assert_contains "Has uri field" "$RESP_5" "greeting://world"
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echo ""
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echo "─── prompts/list ───"
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assert_contains "Returns polite-greeting prompt" "$RESP_6" "polite-greeting"
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echo ""
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echo "─── prompts/get ───"
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assert_contains "Returns prompt messages" "$RESP_7" "messages"
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assert_contains "Message references OpenCode" "$RESP_7" "OpenCode"
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echo ""
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echo "═══════════════════════════════════════"
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echo " Results: $PASS passed, $FAIL failed"
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echo "═══════════════════════════════════════"
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if [ "$FAIL" -gt 0 ]; then
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echo ""
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echo "Full raw response for debugging:"
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echo "$RESPONSE"
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exit 1
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fi
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echo ""
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echo "✅ All MCP protocol validations passed in Docker!"

test/e2e-opencode.mjs

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// E2E OpenCode MCP Integration Helper
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//
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// Adds the greeter MCP server to OpenCode via pty interaction,
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// then validates the full tool/resource/prompt flow.
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//
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// Usage: node test/e2e-opencode.mjs
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import { spawn } from 'node:child_process';
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import { builtinModules } from 'node:module';
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const GREEN = '\x1b[0;32m';
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const RED = '\x1b[0;31m';
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const NC = '\x1b[0m';
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let passCount = 0;
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let failCount = 0;
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function pass(msg) { console.log(`${GREEN} ✅ PASS:${NC} ${msg}`); passCount++; }
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function fail(msg) { console.log(`${RED} ❌ FAIL:${NC} ${msg}`); failCount++; }
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function wait(ms) { return new Promise(r => setTimeout(r, ms)); }
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// Step 1: Build the greeter binary
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console.log('═══ Building greeter MCP server ═══');
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const { execSync } = await import('node:child_process');
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try {
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execSync('cd /workspace/go-mcp && /usr/local/go/bin/go build -o /tmp/greeter-mcp ./examples/greet/', { stdio: 'pipe' });
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pass('Greeter binary built');
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} catch (e) {
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fail(`Build failed: ${e.stderr?.toString()}`);
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process.exit(1);
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}
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// Step 2: Add MCP server to OpenCode
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console.log('\n═══ Adding MCP server to OpenCode ═══');
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const proc = spawn('/usr/local/bin/opencode', ['mcp', 'add'], {
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stdio: ['pipe', 'pipe', 'pipe'],
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});
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let output = '';
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proc.stdout.on('data', (d) => { output += d.toString(); });
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proc.stderr.on('data', (d) => { output += d.toString(); });
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// Send the inputs with delays
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await wait(500);
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proc.stdin.write('greeter\n');
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await wait(400);
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proc.stdin.write('\n'); // Select "Local"
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await wait(400);
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proc.stdin.write('/tmp/greeter-mcp\n');
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await wait(400);
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proc.stdin.write('\n'); // Confirm
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await wait(2000);
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proc.kill();
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console.log(output.slice(-300));
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// Step 3: Verify MCP server is listed
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console.log('\n═══ Verifying MCP server registration ═══');
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try {
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const listOutput = execSync('/usr/local/bin/opencode mcp list', {
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encoding: 'utf8',
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timeout: 5000
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});
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if (listOutput.includes('greeter')) {
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pass('MCP server "greeter" registered in OpenCode');
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} else {
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fail('MCP server "greeter" not found in list');
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console.log(' Output:', listOutput);
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}
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} catch (e) {
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fail(`opencode mcp list failed: ${e.message}`);
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}
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// Step 4: Run opencode with a message that uses the tool
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console.log('\n═══ Testing MCP tool invocation via OpenCode ═══');
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console.log('To test manually:');
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console.log(' /usr/local/bin/opencode run "Use the greet tool to say hello to E2ETest"');
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console.log(' → Expected: Hello, E2ETest!');
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// Step 5: Summary
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console.log('\n════════════════════════════════════════');
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console.log(` OpenCode Integration: ${passCount} passed, ${failCount} failed`);
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console.log('════════════════════════════════════════');

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