github.com/google/uuid v1.6.0: NewDCESecurity

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 pkg:golang/github.com/google/uuid@v1.6.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/github.com/google/uuid@v1.6.0
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - packageManager: npm@11.8.0
  - runtime: node@24.13.1

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:c1bb28b60748cdba1bbe43db2505dd0665d7e56949aa8914b4ae5da10aa59a6c","contract":["uuid.NewDCESecurity generates a non-nil Version 2 UUID for a specified domain and 32-bit ID","uuid.NewDCESecurity returns a UUID with Version 2 and RFC4122 variant","uuid.UUID Domain method returns the assigned domain value","uuid.UUID ID method returns the assigned 32-bit identifier","uuid.NewDCEPerson generates a valid Version 2 UUID in the Person domain","uuid.NewDCEGroup generates a valid Version 2 UUID in the Group domain"],"goal":"verify pkg:golang/github.com/google/uuid@v1.6.0","kind":"HOW","packages":["pkg:golang/github.com/google/uuid@v1.6.0"],"schemaVersion":1,"symbols":["uuid.NewDCESecurity"]},"contractCommand":["go","run","./test"],"environment":{"arch":"x64","ecosystem":"golang","os":"windows","osVersionBucket":"11","packageManager":"go","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/github.com/google/uuid@v1.6.0"],"schemaVersion":1,"symbols":["uuid.NewDCESecurity"],"verifierAdapter":"golang@1"}

module sample

go 1.26.5

require github.com/google/uuid v1.6.0

github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=

package main

import (
	"fmt"
	"log"

	"github.com/google/uuid"
)

// GenerateDCESecurityUUID creates a DCE Security (Version 2) UUID with domain and identifier.
func GenerateDCESecurityUUID(domain uuid.Domain, id uint32) (uuid.UUID, error) {
	return uuid.NewDCESecurity(domain, id)
}

func main() {
	// Generate DCE Security UUID for Org domain
	orgUUID, err := GenerateDCESecurityUUID(uuid.Org, 1001)
	if err != nil {
		log.Fatalf("failed to generate DCE Security UUID: %v", err)
	}

	fmt.Printf("Generated Org DCE UUID: %s\n", orgUUID.String())
	fmt.Printf("Domain: %s, ID: %d, Version: %d\n", orgUUID.Domain().String(), orgUUID.ID(), orgUUID.Version())

	// Generate DCE Security UUID for Person domain
	personUUID, err := uuid.NewDCEPerson()
	if err != nil {
		log.Fatalf("failed to generate DCE Person UUID: %v", err)
	}
	fmt.Printf("Generated Person DCE UUID: %s\n", personUUID.String())
}

{
  "schemaVersion": 1,
  "goal": "verify pkg:golang/github.com/google/uuid@v1.6.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/github.com/google/uuid@v1.6.0"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@11.8.0",
    "runtime": "node@24.13.1"
  }
}

package main

import (
	"fmt"
	"os"

	"github.com/google/uuid"
)

func assertTrue(name string, condition bool) {
	if !condition {
		fmt.Fprintf(os.Stderr, "Assertion failed for %s: expected true, got false\n", name)
		os.Exit(1)
	}
}

func main() {
	// Assertion 1: uuid.NewDCESecurity generates a non-nil Version 2 UUID for a specified domain and 32-bit ID
	const testID = uint32(42000)
	secUUID, err := uuid.NewDCESecurity(uuid.Org, testID)
	assertTrue("uuid.NewDCESecurity returns nil error", err == nil)
	assertTrue("uuid.NewDCESecurity returns non-nil UUID", secUUID != uuid.Nil)

	// Assertion 2: uuid.NewDCESecurity returns a UUID with Version 2 and RFC4122 variant
	assertTrue("uuid.NewDCESecurity has Version 2", secUUID.Version() == 2)
	assertTrue("uuid.NewDCESecurity has RFC4122 variant", secUUID.Variant() == uuid.RFC4122)

	// Assertion 3: uuid.UUID Domain method returns the assigned domain value
	assertTrue("uuid.UUID Domain matches Org", secUUID.Domain() == uuid.Org)
	assertTrue("uuid.Org String returns 'Org'", uuid.Org.String() == "Org")
	assertTrue("uuid.Person String returns 'Person'", uuid.Person.String() == "Person")
	assertTrue("uuid.Group String returns 'Group'", uuid.Group.String() == "Group")

	// Assertion 4: uuid.UUID ID method returns the assigned 32-bit identifier
	assertTrue("uuid.UUID ID matches testID", secUUID.ID() == testID)

	// Assertion 5: uuid.NewDCEPerson generates a valid Version 2 UUID in the Person domain
	personUUID, errPerson := uuid.NewDCEPerson()
	assertTrue("uuid.NewDCEPerson returns nil error", errPerson == nil)
	assertTrue("uuid.NewDCEPerson returns non-nil UUID", personUUID != uuid.Nil)
	assertTrue("uuid.NewDCEPerson has Version 2", personUUID.Version() == 2)
	assertTrue("uuid.NewDCEPerson has Person domain", personUUID.Domain() == uuid.Person)

	// Assertion 6: uuid.NewDCEGroup generates a valid Version 2 UUID in the Group domain
	groupUUID, errGroup := uuid.NewDCEGroup()
	assertTrue("uuid.NewDCEGroup returns nil error", errGroup == nil)
	assertTrue("uuid.NewDCEGroup returns non-nil UUID", groupUUID != uuid.Nil)
	assertTrue("uuid.NewDCEGroup has Version 2", groupUUID.Version() == 2)
	assertTrue("uuid.NewDCEGroup has Group domain", groupUUID.Domain() == uuid.Group)

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