google.golang.org/grpc v1.82.0: codes.NotFound

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/grpc/codes.NotFound in pkg:golang/google.golang.org/grpc@v1.82.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/google.golang.org/grpc@v1.82.0
Demonstrate these symbols/APIs:
  - google.golang.org/grpc/codes.NotFound

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:a4e20473705d09af8ca7b9f9b681e6cd73369e90fc4766254d4eeb5e814a3e80","contract":["codes.NotFound has integer value 5 and string representation \"NotFound\"","status.New creates a Status with Code() equal to codes.NotFound and specified message","status.Code extracts codes.NotFound from an error generated with status.Error(codes.NotFound, ...)","json.Unmarshal parses uppercase string \"NOT_FOUND\" and numeric 5 into codes.NotFound"],"goal":"verify google.golang.org/grpc/codes.NotFound in pkg:golang/google.golang.org/grpc@v1.82.0","kind":"HOW","packages":["pkg:golang/google.golang.org/grpc@v1.82.0"],"schemaVersion":1,"symbols":["google.golang.org/grpc/codes.NotFound"]},"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/grpc@v1.82.0"],"schemaVersion":1,"subject":"pkg:golang/google.golang.org/grpc@v1.82.0","symbols":["google.golang.org/grpc/codes.NotFound"],"verifierAdapter":"golang@1"}

module sample

go 1.25.0

require google.golang.org/grpc v1.82.0

require (
	golang.org/x/sys v0.43.0 // indirect
	google.golang.org/genproto/googleapis/rpc v0.0.0-20260414002931-afd174a4e478 // indirect
	google.golang.org/protobuf v1.36.11 // indirect
)

github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
golang.org/x/net v0.53.0 h1:d+qAbo5L0orcWAr0a9JweQpjXF19LMXJE8Ey7hwOdUA=
golang.org/x/net v0.53.0/go.mod h1:JvMuJH7rrdiCfbeHoo3fCQU24Lf5JJwT9W3sJFulfgs=
golang.org/x/sys v0.43.0 h1:Rlag2XtaFTxp19wS8MXlJwTvoh8ArU6ezoyFsMyCTNI=
golang.org/x/sys v0.43.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
golang.org/x/text v0.36.0 h1:JfKh3XmcRPqZPKevfXVpI1wXPTqbkE5f7JA92a55Yxg=
golang.org/x/text v0.36.0/go.mod h1:NIdBknypM8iqVmPiuco0Dh6P5Jcdk8lJL0CUebqK164=
google.golang.org/genproto/googleapis/rpc v0.0.0-20260414002931-afd174a4e478 h1:RmoJA1ujG+/lRGNfUnOMfhCy5EipVMyvUE+KNbPbTlw=
google.golang.org/genproto/googleapis/rpc v0.0.0-20260414002931-afd174a4e478/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
google.golang.org/grpc v1.82.0 h1:vguDnZUPjE26w09A63VoxZPnvPjB5Riyc0mkXPFmAIU=
google.golang.org/grpc v1.82.0/go.mod h1:yzTZ1TB1Z3SG+LIYaI+WiE8D5+PZ3ArnrSp8zF3+/ZA=
google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=

package main

import (
	"fmt"

	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/status"
)

func main() {
	st := status.New(codes.NotFound, "requested entity was not found")
	fmt.Printf("Code: %v (%d)\n", st.Code(), st.Code())
	fmt.Printf("Message: %s\n", st.Message())
}

{
  "schemaVersion": 1,
  "goal": "verify google.golang.org/grpc/codes.NotFound in pkg:golang/google.golang.org/grpc@v1.82.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/google.golang.org/grpc@v1.82.0"
  ],
  "symbols": [
    "google.golang.org/grpc/codes.NotFound"
  ]
}

package main

import (
	"encoding/json"
	"fmt"
	"os"

	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/status"
)

func main() {
	// Assertion 1: codes.NotFound has integer value 5 and string representation "NotFound"
	if codes.NotFound != 5 {
		fmt.Fprintf(os.Stderr, "assertion 1 failed: expected codes.NotFound == 5, got %d\n", codes.NotFound)
		os.Exit(1)
	}
	if got := codes.NotFound.String(); got != "NotFound" {
		fmt.Fprintf(os.Stderr, "assertion 1 failed: expected codes.NotFound.String() == \"NotFound\", got %q\n", got)
		os.Exit(1)
	}

	// Assertion 2: status.New creates a Status with Code() equal to codes.NotFound and specified message
	msg := "item not found"
	st := status.New(codes.NotFound, msg)
	if st.Code() != codes.NotFound {
		fmt.Fprintf(os.Stderr, "assertion 2 failed: expected Code() == codes.NotFound, got %v\n", st.Code())
		os.Exit(1)
	}
	if st.Message() != msg {
		fmt.Fprintf(os.Stderr, "assertion 2 failed: expected Message() == %q, got %q\n", msg, st.Message())
		os.Exit(1)
	}

	// Assertion 3: status.Code extracts codes.NotFound from an error generated with status.Error(codes.NotFound, ...)
	err := status.Error(codes.NotFound, "entity missing")
	if got := status.Code(err); got != codes.NotFound {
		fmt.Fprintf(os.Stderr, "assertion 3 failed: expected status.Code(err) == codes.NotFound, got %v\n", got)
		os.Exit(1)
	}
	s, ok := status.FromError(err)
	if !ok || s.Code() != codes.NotFound {
		fmt.Fprintf(os.Stderr, "assertion 3 failed: expected status.FromError to return ok and codes.NotFound, got ok=%v code=%v\n", ok, s.Code())
		os.Exit(1)
	}

	// Assertion 4: json.Unmarshal parses uppercase string "NOT_FOUND" and numeric 5 into codes.NotFound
	var c1 codes.Code
	if err := json.Unmarshal([]byte(`"NOT_FOUND"`), &c1); err != nil {
		fmt.Fprintf(os.Stderr, "assertion 4 failed: json.Unmarshal NOT_FOUND error: %v\n", err)
		os.Exit(1)
	}
	if c1 != codes.NotFound {
		fmt.Fprintf(os.Stderr, "assertion 4 failed: expected codes.NotFound, got %v\n", c1)
		os.Exit(1)
	}

	var c2 codes.Code
	if err := json.Unmarshal([]byte(`5`), &c2); err != nil {
		fmt.Fprintf(os.Stderr, "assertion 4 failed: json.Unmarshal 5 error: %v\n", err)
		os.Exit(1)
	}
	if c2 != codes.NotFound {
		fmt.Fprintf(os.Stderr, "assertion 4 failed: expected codes.NotFound, got %v\n", c2)
		os.Exit(1)
	}

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