golang.org/x/net v0.51.0: atom.P

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.P in pkg:golang/golang.org/x/net@v0.51.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/golang.org/x/net@v0.51.0
Demonstrate these symbols/APIs:
  - golang.org/x/net/html/atom.P

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.

package atompsample

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

// IsParagraphAtom checks whether the provided atom corresponds to the HTML 'p' element tag atom.
func IsParagraphAtom(a atom.Atom) bool {
	return a == atom.P
}

// ParagraphAtomString returns the string name corresponding to atom.P.
func ParagraphAtomString() string {
	return atom.P.String()
}

// LookupParagraphAtom attempts to look up an atom by byte slice and checks if it matches atom.P.
func LookupParagraphAtom(b []byte) (atom.Atom, bool) {
	a := atom.Lookup(b)
	return a, a == atom.P
}

{"case":{"caseId":"case:sha256:3b7d145498229e1a5e3dad7763415cd8bb93e5fad9f026c2e6ada1c5076206b4","contract":["atom.P represents the HTML paragraph tag atom with non-zero integer code and 'p' string representation","atom.Lookup maps lowercase byte slice 'p' to atom.P and distinguishes other tags or non-atom identifiers"],"goal":"verify golang.org/x/net/html/atom.P in pkg:golang/golang.org/x/net@v0.51.0","kind":"HOW","packages":["pkg:golang/golang.org/x/net@v0.51.0"],"schemaVersion":1,"symbols":["golang.org/x/net/html/atom.P"]},"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@v0.51.0"],"schemaVersion":1,"subject":"pkg:golang/golang.org/x/net@v0.51.0","symbols":["golang.org/x/net/html/atom.P"],"verifierAdapter":"golang@1"}

module example.com/atom-p-sample

go 1.26.6

require golang.org/x/net v0.51.0

golang.org/x/net v0.51.0 h1:94R/GTO7mt3/4wIKpcR5gkGmRLOuE/2hNGeWq/GBIFo=
golang.org/x/net v0.51.0/go.mod h1:aamm+2QF5ogm02fjy5Bb7CQ0WMt1/WVM7FtyaTLlA9Y=

{
  "schemaVersion": 1,
  "goal": "verify golang.org/x/net/html/atom.P in pkg:golang/golang.org/x/net@v0.51.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/golang.org/x/net@v0.51.0"
  ],
  "symbols": [
    "golang.org/x/net/html/atom.P"
  ]
}

package main

import (
	"fmt"
	"os"

	atompsample "example.com/atom-p-sample"
	"golang.org/x/net/html/atom"
)

func main() {
	// Assertion 1: atom.P is non-zero and its String() returns "p"
	if atom.P == 0 {
		fmt.Fprintf(os.Stderr, "FAIL: expected atom.P to be non-zero\n")
		os.Exit(1)
	}
	if atom.P.String() != "p" {
		fmt.Fprintf(os.Stderr, "FAIL: expected atom.P.String() to be 'p', got %q\n", atom.P.String())
		os.Exit(1)
	}

	// Assertion 2: atom.Lookup of byte slice "p" resolves to atom.P
	lookupP := atom.Lookup([]byte("p"))
	if lookupP != atom.P {
		fmt.Fprintf(os.Stderr, "FAIL: expected atom.Lookup([]byte(\"p\")) to be atom.P, got %v\n", lookupP)
		os.Exit(1)
	}
	if lookupP.String() != "p" {
		fmt.Fprintf(os.Stderr, "FAIL: expected lookupP.String() to be 'p', got %q\n", lookupP.String())
		os.Exit(1)
	}

	// Assertion 3: atom.Lookup is case-sensitive and non-matching tags return 0 or distinct atom
	lookupUpperP := atom.Lookup([]byte("P"))
	if lookupUpperP != 0 {
		fmt.Fprintf(os.Stderr, "FAIL: expected atom.Lookup([]byte(\"P\")) to be 0, got %v\n", lookupUpperP)
		os.Exit(1)
	}
	lookupDiv := atom.Lookup([]byte("div"))
	if lookupDiv == atom.P || lookupDiv == 0 {
		fmt.Fprintf(os.Stderr, "FAIL: expected atom.Lookup([]byte(\"div\")) to differ from atom.P and 0, got %v\n", lookupDiv)
		os.Exit(1)
	}
	if atom.Lookup([]byte("paragraph")) != 0 {
		fmt.Fprintf(os.Stderr, "FAIL: expected non-atom tag 'paragraph' to yield 0\n")
		os.Exit(1)
	}

	// Assertion 4: atom.String helper matches atom.P.String()
	str := atom.String([]byte("p"))
	if str != "p" {
		fmt.Fprintf(os.Stderr, "FAIL: expected atom.String([]byte(\"p\")) to be 'p', got %q\n", str)
		os.Exit(1)
	}

	// Assertion 5: Helper functions verify atom.P identification and lookup
	if !atompsample.IsParagraphAtom(atom.P) {
		fmt.Fprintf(os.Stderr, "FAIL: IsParagraphAtom(atom.P) returned false\n")
		os.Exit(1)
	}
	if atompsample.IsParagraphAtom(atom.Div) {
		fmt.Fprintf(os.Stderr, "FAIL: IsParagraphAtom(atom.Div) returned true\n")
		os.Exit(1)
	}
	if atompsample.ParagraphAtomString() != "p" {
		fmt.Fprintf(os.Stderr, "FAIL: expected ParagraphAtomString() to be 'p', got %q\n", atompsample.ParagraphAtomString())
		os.Exit(1)
	}
	matchedAtom, isP := atompsample.LookupParagraphAtom([]byte("p"))
	if matchedAtom != atom.P || !isP {
		fmt.Fprintf(os.Stderr, "FAIL: LookupParagraphAtom(\"p\") expected (atom.P, true), got (%v, %v)\n", matchedAtom, isP)
		os.Exit(1)
	}
	spanAtom, isP2 := atompsample.LookupParagraphAtom([]byte("span"))
	if spanAtom != atom.Span || isP2 {
		fmt.Fprintf(os.Stderr, "FAIL: LookupParagraphAtom(\"span\") expected (atom.Span, false), got (%v, %v)\n", spanAtom, isP2)
		os.Exit(1)
	}

	fmt.Println("PASS: golang.org/x/net/html/atom.P contract passed")
}