github.com/envoyproxy/go-control-plane/envoy v1.32.2: v3.Cluster_EdsClusterConfig

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify github.com/envoyproxy/go-control-plane/envoy/config/cluster/v3.Cluster_EdsClusterConfig in pkg:golang/github.com/envoyproxy/go-control-plane/envoy@v1.32.2
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/github.com/envoyproxy/go-control-plane/envoy@v1.32.2
Demonstrate these symbols/APIs:
  - github.com/envoyproxy/go-control-plane/envoy/config/cluster/v3.Cluster_EdsClusterConfig

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:79e1259256623db6a87adcd5dd47e82445653f38d3d8b8ddfe39448afec2dc58","contract":["Cluster_EdsClusterConfig initializes with ServiceName and EdsConfig","Cluster_EdsClusterConfig.GetServiceName returns the configured service name or empty string when nil","Cluster_EdsClusterConfig.GetEdsConfig returns the ConfigSource or nil when unset","Cluster_EdsClusterConfig.Validate and ValidateAll succeed on valid EDS configuration","Cluster_EdsClusterConfig.ValidateAll returns an error when nested EdsConfig fails validation","Cluster.GetEdsClusterConfig returns the attached Cluster_EdsClusterConfig for an EDS cluster","Cluster_EdsClusterConfig.Reset clears ServiceName and EdsConfig to zero values"],"goal":"verify github.com/envoyproxy/go-control-plane/envoy/config/cluster/v3.Cluster_EdsClusterConfig in pkg:golang/github.com/envoyproxy/go-control-plane/envoy@v1.32.2","kind":"HOW","packages":["pkg:golang/github.com/envoyproxy/go-control-plane/envoy@v1.32.2"],"schemaVersion":1,"symbols":["github.com/envoyproxy/go-control-plane/envoy/config/cluster/v3.Cluster_EdsClusterConfig"]},"contractCommand":["go","run","./test"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"golang","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"go","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/github.com/envoyproxy/go-control-plane/envoy@v1.32.2"],"schemaVersion":1,"subject":"pkg:golang/github.com/envoyproxy/go-control-plane/envoy@v1.32.2","symbols":["github.com/envoyproxy/go-control-plane/envoy/config/cluster/v3.Cluster_EdsClusterConfig"],"verifierAdapter":"golang@1"}

module sample

go 1.24

require (
	github.com/envoyproxy/go-control-plane/envoy v1.32.2
	google.golang.org/protobuf v1.35.2
)

require (
	github.com/cncf/xds/go v0.0.0-20240723142845-024c85f92f20 // indirect
	github.com/envoyproxy/protoc-gen-validate v1.1.0 // indirect
	github.com/planetscale/vtprotobuf v0.6.1-0.20240319094008-0393e58bdf10 // indirect
)

github.com/cncf/xds/go v0.0.0-20240723142845-024c85f92f20 h1:N+3sFI5GUjRKBi+i0TxYVST9h4Ie192jJWpHvthBBgg=
github.com/cncf/xds/go v0.0.0-20240723142845-024c85f92f20/go.mod h1:W+zGtBO5Y1IgJhy4+A9GOqVhqLpfZi+vwmdNXUehLA8=
github.com/envoyproxy/go-control-plane/envoy v1.32.2 h1:zidqwmijfcbyKqVxjQDFx042PgX+p9U+/fu/f9VtSk8=
github.com/envoyproxy/go-control-plane/envoy v1.32.2/go.mod h1:eR2SOX2IedqlPvmiKjUH7Wu//S602JKI7HPC/L3SRq8=
github.com/envoyproxy/protoc-gen-validate v1.1.0 h1:tntQDh69XqOCOZsDz0lVJQez/2L6Uu2PdjCQwWCJ3bM=
github.com/envoyproxy/protoc-gen-validate v1.1.0/go.mod h1:sXRDRVmzEbkM7CVcM06s9shE/m23dg3wzjl0UWqJ2q4=
github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/planetscale/vtprotobuf v0.6.1-0.20240319094008-0393e58bdf10 h1:GFCKgmp0tecUJ0sJuv4pzYCqS9+RGSn52M3FUwPs+uo=
github.com/planetscale/vtprotobuf v0.6.1-0.20240319094008-0393e58bdf10/go.mod h1:t/avpk3KcrXxUnYOhZhMXJlSEyie6gQbtLq5NM3loB8=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
google.golang.org/protobuf v1.35.2 h1:8Ar7bF+apOIoThw1EdZl0p1oWvMqTHmpA2fRTyZO8io=
google.golang.org/protobuf v1.35.2/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=

{
  "schemaVersion": 1,
  "goal": "verify github.com/envoyproxy/go-control-plane/envoy/config/cluster/v3.Cluster_EdsClusterConfig in pkg:golang/github.com/envoyproxy/go-control-plane/envoy@v1.32.2",
  "kind": "HOW",
  "packages": [
    "pkg:golang/github.com/envoyproxy/go-control-plane/envoy@v1.32.2"
  ],
  "symbols": [
    "github.com/envoyproxy/go-control-plane/envoy/config/cluster/v3.Cluster_EdsClusterConfig"
  ]
}

package main

import (
	"fmt"
	"os"

	clusterv3 "github.com/envoyproxy/go-control-plane/envoy/config/cluster/v3"
	corev3 "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"
	"google.golang.org/protobuf/types/known/durationpb"
)

func main() {
	if err := runContract(); err != nil {
		fmt.Fprintf(os.Stderr, "contract failed: %v\n", err)
		os.Exit(1)
	}
	fmt.Println("contract ok")
}

func runContract() error {
	// 1. Cluster_EdsClusterConfig initializes with ServiceName and EdsConfig
	adsSource := &corev3.ConfigSource{
		ResourceApiVersion: corev3.ApiVersion_V3,
		ConfigSourceSpecifier: &corev3.ConfigSource_Ads{
			Ads: &corev3.AggregatedConfigSource{},
		},
		InitialFetchTimeout: durationpb.New(0),
	}
	eds := &clusterv3.Cluster_EdsClusterConfig{
		ServiceName: "orders-eds-service",
		EdsConfig:   adsSource,
	}

	// 2. Cluster_EdsClusterConfig.GetServiceName returns the configured service name or empty string when nil
	if eds.GetServiceName() != "orders-eds-service" {
		return fmt.Errorf("expected ServiceName 'orders-eds-service', got %q", eds.GetServiceName())
	}
	var nilEds *clusterv3.Cluster_EdsClusterConfig
	if nilEds.GetServiceName() != "" {
		return fmt.Errorf("expected empty string on nil receiver, got %q", nilEds.GetServiceName())
	}

	// 3. Cluster_EdsClusterConfig.GetEdsConfig returns the ConfigSource or nil when unset
	if eds.GetEdsConfig() != adsSource {
		return fmt.Errorf("expected GetEdsConfig to return configured ConfigSource")
	}
	if nilEds.GetEdsConfig() != nil {
		return fmt.Errorf("expected nil GetEdsConfig on nil receiver")
	}

	// 4. Cluster_EdsClusterConfig.Validate and ValidateAll succeed on valid EDS configuration
	if err := eds.Validate(); err != nil {
		return fmt.Errorf("Validate failed: %w", err)
	}
	if err := eds.ValidateAll(); err != nil {
		return fmt.Errorf("ValidateAll failed: %w", err)
	}

	// 5. Cluster_EdsClusterConfig.ValidateAll returns an error when nested EdsConfig fails validation
	badEds := &clusterv3.Cluster_EdsClusterConfig{
		EdsConfig: &corev3.ConfigSource{
			InitialFetchTimeout: &durationpb.Duration{Seconds: -1},
		},
	}
	if err := badEds.ValidateAll(); err == nil {
		return fmt.Errorf("expected ValidateAll to fail on invalid EdsConfig")
	}

	// 6. Cluster.GetEdsClusterConfig returns the attached Cluster_EdsClusterConfig for an EDS cluster
	c := &clusterv3.Cluster{
		Name:                 "orders_cluster",
		ClusterDiscoveryType: &clusterv3.Cluster_Type{Type: clusterv3.Cluster_EDS},
		EdsClusterConfig:     eds,
	}
	if c.GetEdsClusterConfig() != eds {
		return fmt.Errorf("expected Cluster.GetEdsClusterConfig to match eds")
	}

	// 7. Cluster_EdsClusterConfig.Reset clears ServiceName and EdsConfig to zero values
	resetTarget := &clusterv3.Cluster_EdsClusterConfig{
		ServiceName: "temp-eds",
		EdsConfig:   adsSource,
	}
	resetTarget.Reset()
	if resetTarget.GetServiceName() != "" || resetTarget.GetEdsConfig() != nil {
		return fmt.Errorf("Reset did not clear fields")
	}

	return nil
}