google.golang.org/genproto/googleapis/api v0.0.0-20260825221802-da73d73af1c5: monitoredres.MonitoredResource

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 google.golang.org/genproto/googleapis/api/monitoredres.MonitoredResource in pkg:golang/google.golang.org/genproto/googleapis/api@v0.0.0-20260825221802-da73d73af1c5
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/google.golang.org/genproto/googleapis/api@v0.0.0-20260825221802-da73d73af1c5
Demonstrate these symbols/APIs:
  - google.golang.org/genproto/googleapis/api/monitoredres.MonitoredResource

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:ce155f734b7dfa0c13a0b82094113db2fad0408279c899114d7caf529d06cd8e","contract":["MonitoredResource represents a cloud resource with Type string and Labels key-value mapping","MonitoredResource safe getters return default zero values when called on a nil instance","MonitoredResource serializes to protobuf binary format and deserializes preserving Type and Labels","MonitoredResource Reset clears all fields to their zero values","MonitoredResource implements protoreflect.ProtoMessage with full descriptor name google.api.MonitoredResource"],"goal":"verify google.golang.org/genproto/googleapis/api/monitoredres.MonitoredResource in pkg:golang/google.golang.org/genproto/googleapis/api@v0.0.0-20260825221802-da73d73af1c5","kind":"HOW","packages":["pkg:golang/google.golang.org/genproto/googleapis/api@v0.0.0-20260825221802-da73d73af1c5"],"schemaVersion":1,"symbols":["google.golang.org/genproto/googleapis/api/monitoredres.MonitoredResource"]},"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/google.golang.org/genproto/googleapis/api@v0.0.0-20260825221802-da73d73af1c5"],"schemaVersion":1,"subject":"pkg:golang/google.golang.org/genproto/googleapis/api@v0.0.0-20260825221802-da73d73af1c5","symbols":["google.golang.org/genproto/googleapis/api/monitoredres.MonitoredResource"],"verifierAdapter":"golang@1"}

module sample

go 1.26.6

require (
	google.golang.org/genproto/googleapis/api v0.0.0-20260825221802-da73d73af1c5
	google.golang.org/protobuf v1.36.12
)

github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
google.golang.org/genproto/googleapis/api v0.0.0-20260825221802-da73d73af1c5 h1:izFU9hz7aeLI/Mi1J0991ae+xcwRLr7hTqWnB/9aIIU=
google.golang.org/genproto/googleapis/api v0.0.0-20260825221802-da73d73af1c5/go.mod h1:3LhxRw4YYkf+ylAfgaY9JlVLFKhokkCV8duhLLe7+t0=
google.golang.org/protobuf v1.36.12 h1:pJOKDDOyeXErUroCihFAd5LQuwXBSpVnKGrj5o/fwxc=
google.golang.org/protobuf v1.36.12/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=

package main

import (
	"fmt"
	"log"

	"google.golang.org/genproto/googleapis/api/monitoredres"
	"google.golang.org/protobuf/proto"
)

func main() {
	// 1. Construct a MonitoredResource representing a cloud resource instance
	res := &monitoredres.MonitoredResource{
		Type: "gce_instance",
		Labels: map[string]string{
			"project_id":  "example-project",
			"instance_id": "12345678901234",
			"zone":        "us-central1-a",
		},
	}

	fmt.Printf("Monitored resource type: %s\n", res.GetType())
	for k, v := range res.GetLabels() {
		fmt.Printf("  label %s: %s\n", k, v)
	}

	// 2. Serialize to protobuf wire format
	data, err := proto.Marshal(res)
	if err != nil {
		log.Fatalf("failed to marshal monitored resource: %v", err)
	}

	// 3. Deserialize back into a new instance
	var decoded monitoredres.MonitoredResource
	if err := proto.Unmarshal(data, &decoded); err != nil {
		log.Fatalf("failed to unmarshal monitored resource: %v", err)
	}

	fmt.Printf("Decoded resource type: %s (matching original: %v)\n", decoded.GetType(), proto.Equal(res, &decoded))
}

{
  "schemaVersion": 1,
  "goal": "verify google.golang.org/genproto/googleapis/api/monitoredres.MonitoredResource in pkg:golang/google.golang.org/genproto/googleapis/api@v0.0.0-20260825221802-da73d73af1c5",
  "kind": "HOW",
  "packages": [
    "pkg:golang/google.golang.org/genproto/googleapis/api@v0.0.0-20260825221802-da73d73af1c5"
  ],
  "symbols": [
    "google.golang.org/genproto/googleapis/api/monitoredres.MonitoredResource"
  ]
}

package main

import (
	"fmt"
	"os"

	"google.golang.org/genproto/googleapis/api/monitoredres"
	"google.golang.org/protobuf/proto"
)

func assert(condition bool, message string) {
	if !condition {
		fmt.Fprintf(os.Stderr, "Assertion failed: %s\n", message)
		os.Exit(1)
	}
}

func main() {
	// 1. MonitoredResource represents a cloud resource with Type string and Labels key-value mapping
	res := &monitoredres.MonitoredResource{
		Type: "gce_instance",
		Labels: map[string]string{
			"project_id":  "example-project",
			"instance_id": "12345678901234",
			"zone":        "us-central1-a",
		},
	}
	assert(res.GetType() == "gce_instance", "GetType should return configured type")
	assert(len(res.GetLabels()) == 3, "GetLabels should return 3 labels")
	assert(res.GetLabels()["project_id"] == "example-project", "GetLabels should contain project_id")
	assert(res.GetLabels()["instance_id"] == "12345678901234", "GetLabels should contain instance_id")
	assert(res.GetLabels()["zone"] == "us-central1-a", "GetLabels should contain zone")

	// 2. MonitoredResource safe getters return default zero values when called on a nil instance
	var nilRes *monitoredres.MonitoredResource
	assert(nilRes.GetType() == "", "nil GetType should return empty string")
	assert(nilRes.GetLabels() == nil, "nil GetLabels should return nil map")

	// 3. MonitoredResource serializes to protobuf binary format and deserializes preserving Type and Labels
	data, err := proto.Marshal(res)
	assert(err == nil, "proto.Marshal should succeed")
	assert(len(data) > 0, "marshaled payload should not be empty")

	var unmarshaled monitoredres.MonitoredResource
	err = proto.Unmarshal(data, &unmarshaled)
	assert(err == nil, "proto.Unmarshal should succeed")
	assert(unmarshaled.GetType() == "gce_instance", "unmarshaled type should match")
	assert(unmarshaled.GetLabels()["project_id"] == "example-project", "unmarshaled label should match")
	assert(proto.Equal(res, &unmarshaled), "unmarshaled message should equal original")

	// 4. MonitoredResource Reset clears all fields to their zero values
	res.Reset()
	assert(res.GetType() == "", "GetType should return empty string after Reset")
	assert(res.GetLabels() == nil, "GetLabels should return nil after Reset")

	// 5. MonitoredResource implements protoreflect.ProtoMessage with full descriptor name google.api.MonitoredResource
	emptyRes := &monitoredres.MonitoredResource{}
	msgDesc := emptyRes.ProtoReflect().Descriptor()
	assert(msgDesc.FullName() == "google.api.MonitoredResource", "descriptor full name should be google.api.MonitoredResource")

	fmt.Println("All contract assertions passed successfully.")
}