google.golang.org/genproto/googleapis/rpc v0.0.0-20251029180050-ab9386a59fda: errdetails.DebugInfo

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/rpc/errdetails.DebugInfo in pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20251029180050-ab9386a59fda
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20251029180050-ab9386a59fda
Demonstrate these symbols/APIs:
  - google.golang.org/genproto/googleapis/rpc/errdetails.DebugInfo

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:c6e630340c995f31a9ffc68e5e90de8d710b5aa8dd33459b147d3c59c9b7f6d8","contract":["errdetails.DebugInfo.GetStackEntries returns nil for a nil DebugInfo and returns the slice of stack entries when populated.","errdetails.DebugInfo.GetDetail returns an empty string for a nil DebugInfo and returns the detail string when set.","errdetails.DebugInfo serializes and deserializes accurately using proto.Marshal and proto.Unmarshal preserving detail and stack entries.","errdetails.DebugInfo.Reset clears detail and stack entries from the message."],"goal":"verify google.golang.org/genproto/googleapis/rpc/errdetails.DebugInfo in pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20251029180050-ab9386a59fda","kind":"HOW","packages":["pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20251029180050-ab9386a59fda"],"schemaVersion":1,"symbols":["google.golang.org/genproto/googleapis/rpc/errdetails.DebugInfo"]},"contractCommand":["go","test","./..."],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"golang","executionContext":"go","language":"go","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"go","runtime":"go","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20251029180050-ab9386a59fda"],"schemaVersion":1,"subject":"pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20251029180050-ab9386a59fda","symbols":["google.golang.org/genproto/googleapis/rpc/errdetails.DebugInfo"],"verifierAdapter":"golang@1"}

module example.com/debuginfo

go 1.25.0

require (
	google.golang.org/genproto/googleapis/rpc v0.0.0-20251029180050-ab9386a59fda
	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/rpc v0.0.0-20251029180050-ab9386a59fda h1:i/Q+bfisr7gq6feoJnS/DlpdwEL4ihp41fvRiM3Ork0=
google.golang.org/genproto/googleapis/rpc v0.0.0-20251029180050-ab9386a59fda/go.mod h1:7i2o+ce6H/6BluujYR+kqX3GKH+dChPTQU19wjRPiGk=
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"

	"google.golang.org/genproto/googleapis/rpc/errdetails"
	"google.golang.org/protobuf/proto"
)

func main() {
	debugInfo := &errdetails.DebugInfo{
		StackEntries: []string{
			"service.go:42 in HandleRequest",
			"handler.go:108 in ProcessPayload",
		},
		Detail: "database timeout after 5000ms",
	}

	for _, entry := range debugInfo.GetStackEntries() {
		fmt.Printf("Stack entry: %s\n", entry)
	}
	fmt.Printf("Detail: %s\n", debugInfo.GetDetail())

	data, err := proto.Marshal(debugInfo)
	if err != nil {
		panic(err)
	}

	var decoded errdetails.DebugInfo
	if err := proto.Unmarshal(data, &decoded); err != nil {
		panic(err)
	}
	fmt.Printf("Decoded detail: %s\n", decoded.GetDetail())
	fmt.Printf("Decoded entries count: %d\n", len(decoded.GetStackEntries()))

	debugInfo.Reset()
	fmt.Printf("After reset detail: %s\n", debugInfo.GetDetail())
	fmt.Printf("After reset entries count: %d\n", len(debugInfo.GetStackEntries()))
}

{
  "schemaVersion": 1,
  "goal": "verify google.golang.org/genproto/googleapis/rpc/errdetails.DebugInfo in pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20251029180050-ab9386a59fda",
  "kind": "HOW",
  "packages": [
    "pkg:golang/google.golang.org/genproto/googleapis/rpc@v0.0.0-20251029180050-ab9386a59fda"
  ],
  "symbols": [
    "google.golang.org/genproto/googleapis/rpc/errdetails.DebugInfo"
  ]
}

package test

import (
	"testing"

	"google.golang.org/genproto/googleapis/rpc/errdetails"
	"google.golang.org/protobuf/proto"
)

func TestDebugInfoGettersOnNil(t *testing.T) {
	var nilDebugInfo *errdetails.DebugInfo
	if got := nilDebugInfo.GetStackEntries(); got != nil {
		t.Errorf("nilDebugInfo.GetStackEntries() = %v, want nil", got)
	}
	if got := nilDebugInfo.GetDetail(); got != "" {
		t.Errorf("nilDebugInfo.GetDetail() = %q, want empty string", got)
	}
}

func TestDebugInfoGettersOnPopulated(t *testing.T) {
	info := &errdetails.DebugInfo{
		StackEntries: []string{
			"main.go:10",
			"handler.go:25",
		},
		Detail: "connection reset by peer",
	}

	entries := info.GetStackEntries()
	if len(entries) != 2 {
		t.Fatalf("expected 2 stack entries, got %d", len(entries))
	}
	if entries[0] != "main.go:10" || entries[1] != "handler.go:25" {
		t.Errorf("unexpected stack entries: %v", entries)
	}
	if got := info.GetDetail(); got != "connection reset by peer" {
		t.Errorf("info.GetDetail() = %q, want %q", got, "connection reset by peer")
	}
}

func TestDebugInfoProtoSerialization(t *testing.T) {
	original := &errdetails.DebugInfo{
		StackEntries: []string{"trace-entry-1", "trace-entry-2"},
		Detail:       "internal service fault",
	}

	data, err := proto.Marshal(original)
	if err != nil {
		t.Fatalf("proto.Marshal failed: %v", err)
	}

	var unmarshaled errdetails.DebugInfo
	if err := proto.Unmarshal(data, &unmarshaled); err != nil {
		t.Fatalf("proto.Unmarshal failed: %v", err)
	}

	if unmarshaled.GetDetail() != "internal service fault" {
		t.Errorf("unmarshaled detail = %q, want %q", unmarshaled.GetDetail(), "internal service fault")
	}
	if len(unmarshaled.GetStackEntries()) != 2 {
		t.Fatalf("unmarshaled entries count = %d, want 2", len(unmarshaled.GetStackEntries()))
	}
	if unmarshaled.GetStackEntries()[0] != "trace-entry-1" || unmarshaled.GetStackEntries()[1] != "trace-entry-2" {
		t.Errorf("unmarshaled entries mismatch: %v", unmarshaled.GetStackEntries())
	}
}

func TestDebugInfoReset(t *testing.T) {
	info := &errdetails.DebugInfo{
		StackEntries: []string{"entry"},
		Detail:       "something failed",
	}
	info.Reset()
	if got := info.GetStackEntries(); got != nil {
		t.Errorf("info.GetStackEntries() after Reset() = %v, want nil", got)
	}
	if got := info.GetDetail(); got != "" {
		t.Errorf("info.GetDetail() after Reset() = %q, want empty string", got)
	}
}