golang.org/x/net v0.29.0: atom.Button

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.Button in pkg:golang/golang.org/x/net@v0.29.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/golang.org/x/net@v0.29.0
Demonstrate these symbols/APIs:
  - golang.org/x/net/html/atom.Button

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:sha256:2454ad04500a9eaf30c2ff98ad09d2c0dbac901a5404cc4dcfc6d26d168c2ed9","contract":["atom.Button is a non-zero Atom constant representing the \"button\" HTML tag","atom.Button.String returns \"button\"","atom.Lookup with byte slice \"button\" returns atom.Button","atom.Lookup is case-sensitive and returns 0 for uppercase \"BUTTON\"","atom.String with byte slice \"button\" returns string \"button\"","atom.Button is distinct from other HTML tag atoms including atom.Input and atom.Form"],"goal":"verify golang.org/x/net/html/atom.Button in pkg:golang/golang.org/x/net@v0.29.0","kind":"HOW","packages":["pkg:golang/golang.org/x/net@v0.29.0"],"schemaVersion":1,"symbols":["golang.org/x/net/html/atom.Button"]},"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@v0.29.0"],"schemaVersion":1,"subject":"pkg:golang/golang.org/x/net@v0.29.0","symbols":["golang.org/x/net/html/atom.Button"],"verifierAdapter":"golang@1"}

module example.com/sample

go 1.26.6

require golang.org/x/net v0.29.0

golang.org/x/net v0.29.0 h1:5ORfpBpCs4HzDYoodCDBbwHzdR5UrLBZ3sOnUJmFoHo=
golang.org/x/net v0.29.0/go.mod h1:gLkgy8jTGERgjzMic6DS9+SP0ajcu6Xu3Orq/SpETg0=

package main

import (
	"fmt"

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

func main() {
	// atom.Button represents the HTML "button" element tag
	btn := atom.Button
	fmt.Printf("Atom: %s (value: 0x%x)\n", btn.String(), uint32(btn))

	// Lookup returns the atom corresponding to the given byte slice
	lookedUp := atom.Lookup([]byte("button"))
	fmt.Printf("Lookup(\"button\") == atom.Button: %t\n", lookedUp == btn)

	// String returns the canonical string name
	str := atom.String([]byte("button"))
	fmt.Printf("String(\"button\"): %s\n", str)
}

{
  "schemaVersion": 1,
  "goal": "verify golang.org/x/net/html/atom.Button in pkg:golang/golang.org/x/net@v0.29.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/golang.org/x/net@v0.29.0"
  ],
  "symbols": [
    "golang.org/x/net/html/atom.Button"
  ]
}

package main

import (
	"fmt"
	"os"

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

func main() {
	if err := runContractTests(); err != nil {
		fmt.Fprintf(os.Stderr, "Contract test failed: %v\n", err)
		os.Exit(1)
	}
	fmt.Println("All contract assertions passed.")
}

func runContractTests() error {
	// 1. atom.Button is a non-zero Atom constant representing the "button" HTML tag
	if atom.Button == 0 {
		return fmt.Errorf("expected atom.Button to be non-zero, got 0")
	}

	// 2. atom.Button.String returns "button"
	if atom.Button.String() != "button" {
		return fmt.Errorf("expected atom.Button.String() to equal %q, got %q", "button", atom.Button.String())
	}

	// 3. atom.Lookup with byte slice "button" returns atom.Button
	if got := atom.Lookup([]byte("button")); got != atom.Button {
		return fmt.Errorf("expected atom.Lookup([]byte(\"button\")) to equal atom.Button, got %v", got)
	}

	// 4. atom.Lookup is case-sensitive and returns 0 for uppercase "BUTTON"
	if got := atom.Lookup([]byte("BUTTON")); got != 0 {
		return fmt.Errorf("expected atom.Lookup([]byte(\"BUTTON\")) to return 0, got %v", got)
	}

	// 5. atom.String with byte slice "button" returns string "button"
	if got := atom.String([]byte("button")); got != "button" {
		return fmt.Errorf("expected atom.String([]byte(\"button\")) to equal %q, got %q", "button", got)
	}

	// 6. atom.Button is distinct from other HTML tag atoms including atom.Input and atom.Form
	if atom.Button == atom.Input {
		return fmt.Errorf("expected atom.Button != atom.Input")
	}
	if atom.Button == atom.Form {
		return fmt.Errorf("expected atom.Button != atom.Form")
	}

	return nil
}