golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7: atom.Body

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.Body in pkg:golang/golang.org/x/net@v0.0.0-20190813141303-74dc4d7220e7
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/golang.org/x/net@v0.0.0-20190813141303-74dc4d7220e7
Demonstrate these symbols/APIs:
  - golang.org/x/net/html/atom.Body

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:sha256:903b2e8e87bfe91162304b273c77743cafd8054b04d704338e01a48d7639108a","contract":["atom.Body.String() returns \"body\"","atom.Lookup([]byte(\"body\")) returns atom.Body","html.Parse sets DataAtom to atom.Body on parsed \u003cbody\u003e element nodes"],"goal":"verify golang.org/x/net/html/atom.Body in pkg:golang/golang.org/x/net@v0.0.0-20190813141303-74dc4d7220e7","kind":"HOW","packages":["pkg:golang/golang.org/x/net@v0.0.0-20190813141303-74dc4d7220e7"],"schemaVersion":1,"symbols":["golang.org/x/net/html/atom.Body"]},"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@v0.0.0-20190813141303-74dc4d7220e7"],"schemaVersion":1,"subject":"pkg:golang/golang.org/x/net@v0.0.0-20190813141303-74dc4d7220e7","symbols":["golang.org/x/net/html/atom.Body"],"verifierAdapter":"golang@1"}

module sample

go 1.21

require golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7

golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7 h1:fHDIZ2oxGnUZRN6WgWFCbYBjH9uqVPRCUVUDhs0wnbA=
golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=

{
  "schemaVersion": 1,
  "goal": "verify golang.org/x/net/html/atom.Body in pkg:golang/golang.org/x/net@v0.0.0-20190813141303-74dc4d7220e7",
  "kind": "HOW",
  "packages": [
    "pkg:golang/golang.org/x/net@v0.0.0-20190813141303-74dc4d7220e7"
  ],
  "symbols": [
    "golang.org/x/net/html/atom.Body"
  ]
}

package main

import (
	"fmt"
	"os"
	"strings"

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

func findBody(n *html.Node) *html.Node {
	if n.Type == html.ElementNode && n.DataAtom == atom.Body {
		return n
	}
	for c := n.FirstChild; c != nil; c = c.NextSibling {
		if found := findBody(c); found != nil {
			return found
		}
	}
	return nil
}

func main() {
	if atom.Body.String() != "body" {
		fmt.Fprintf(os.Stderr, "expected atom.Body.String() == \"body\", got %q\n", atom.Body.String())
		os.Exit(1)
	}

	if atom.Lookup([]byte("body")) != atom.Body {
		fmt.Fprintf(os.Stderr, "expected atom.Lookup([]byte(\"body\")) == atom.Body\n")
		os.Exit(1)
	}

	doc, err := html.Parse(strings.NewReader("<html><head><title>T</title></head><body id=\"main\"><p>hello</p></body></html>"))
	if err != nil {
		fmt.Fprintf(os.Stderr, "html.Parse failed: %v\n", err)
		os.Exit(1)
	}

	bodyNode := findBody(doc)
	if bodyNode == nil {
		fmt.Fprintf(os.Stderr, "failed to find element with DataAtom == atom.Body\n")
		os.Exit(1)
	}
	if bodyNode.Data != "body" {
		fmt.Fprintf(os.Stderr, "expected bodyNode.Data == \"body\", got %q\n", bodyNode.Data)
		os.Exit(1)
	}
}