golang.org/x/net v0.2.0: atom.Ul

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 golang.org/x/net/html/atom.Ul in pkg:golang/golang.org/x/net@v0.2.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/golang.org/x/net@v0.2.0
Demonstrate these symbols/APIs:
  - golang.org/x/net/html/atom.Ul

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:sha256:9053a7bd660523032c33abec824d0bc3d7a598cc9d026d7ec5f2333f185f3551","contract":["atom.Ul.String() returns \"ul\"","atom.Lookup([]byte(\"ul\")) returns atom.Ul","atom.String([]byte(\"ul\")) returns \"ul\""],"goal":"verify golang.org/x/net/html/atom.Ul in pkg:golang/golang.org/x/net@v0.2.0","kind":"HOW","packages":["pkg:golang/golang.org/x/net@v0.2.0"],"schemaVersion":1,"symbols":["golang.org/x/net/html/atom.Ul"]},"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/golang.org/x/net@v0.2.0"],"schemaVersion":1,"subject":"pkg:golang/golang.org/x/net@v0.2.0","symbols":["golang.org/x/net/html/atom.Ul"],"verifierAdapter":"golang@1"}

module sample

go 1.21

require golang.org/x/net v0.2.0

golang.org/x/net v0.2.0 h1:sZfSu1wtKLGlWI4ZZayP0ck9Y73K1ynO6gqzTdBVdPU=
golang.org/x/net v0.2.0/go.mod h1:KqCZLdyyvdV855qA2rE3GC2aiw5xGR5TEjj8smXukLY=

{
  "schemaVersion": 1,
  "goal": "verify golang.org/x/net/html/atom.Ul in pkg:golang/golang.org/x/net@v0.2.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/golang.org/x/net@v0.2.0"
  ],
  "symbols": [
    "golang.org/x/net/html/atom.Ul"
  ]
}

package main

import (
	"fmt"
	"os"

	"golang.org/x/net/html/atom"
)

func main() {
	a := atom.Ul
	if a.String() != "ul" {
		fmt.Fprintf(os.Stderr, "expected String() to be %q, got %q\n", "ul", a.String())
		os.Exit(1)
	}
	if atom.Lookup([]byte("ul")) != atom.Ul {
		fmt.Fprintf(os.Stderr, "expected Lookup(\"ul\") to equal atom.Ul\n")
		os.Exit(1)
	}
	if atom.String([]byte("ul")) != "ul" {
		fmt.Fprintf(os.Stderr, "expected atom.String(\"ul\") to equal \"ul\"\n")
		os.Exit(1)
	}
}