golang.org/x/net v0.0.0-20210525063256-abc453219eb5: atom.Hr

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.Hr in pkg:golang/golang.org/x/net@v0.0.0-20210525063256-abc453219eb5
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/golang.org/x/net@v0.0.0-20210525063256-abc453219eb5
Demonstrate these symbols/APIs:
  - golang.org/x/net/html/atom.Hr

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:c0003c5dd60bc15fb76b22da45c856658e195d78d6196f166f0018c3fe66f7e9","contract":["atom.Hr is a non-zero atom.Atom constant representing the HTML \u003chr\u003e element","atom.Hr.String() returns \"hr\"","atom.Lookup([]byte(\"hr\")) returns atom.Hr and does not match non-hr tag names such as \"div\""],"goal":"verify golang.org/x/net/html/atom.Hr in pkg:golang/golang.org/x/net@v0.0.0-20210525063256-abc453219eb5","kind":"HOW","packages":["pkg:golang/golang.org/x/net@v0.0.0-20210525063256-abc453219eb5"],"schemaVersion":1,"symbols":["golang.org/x/net/html/atom.Hr"]},"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@v0.0.0-20210525063256-abc453219eb5"],"schemaVersion":1,"subject":"pkg:golang/golang.org/x/net@v0.0.0-20210525063256-abc453219eb5","symbols":["golang.org/x/net/html/atom.Hr"],"verifierAdapter":"golang@1"}

module example.com/sample

go 1.20

require golang.org/x/net v0.0.0-20210525063256-abc453219eb5

golang.org/x/net v0.0.0-20210525063256-abc453219eb5 h1:wjuX4b5yYQnEQHzd+CBcrcC6OVR2J1CN6mUy0oSxIPo=
golang.org/x/net v0.0.0-20210525063256-abc453219eb5/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=

package main

import (
	"fmt"

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

func HrTagName() string {
	return atom.Hr.String()
}

func IsHrAtom(raw []byte) bool {
	return atom.Lookup(raw) == atom.Hr
}

func main() {
	fmt.Println(HrTagName())
}

{
  "schemaVersion": 1,
  "goal": "verify golang.org/x/net/html/atom.Hr in pkg:golang/golang.org/x/net@v0.0.0-20210525063256-abc453219eb5",
  "kind": "HOW",
  "packages": [
    "pkg:golang/golang.org/x/net@v0.0.0-20210525063256-abc453219eb5"
  ],
  "symbols": [
    "golang.org/x/net/html/atom.Hr"
  ]
}

package main

import (
	"os"

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

func main() {
	a := atom.Hr
	if a == 0 {
		os.Exit(1)
	}
	if a.String() != "hr" {
		os.Exit(1)
	}
	if atom.Lookup([]byte("hr")) != atom.Hr {
		os.Exit(1)
	}
	if atom.Lookup([]byte("div")) == atom.Hr {
		os.Exit(1)
	}
}