golang.org/x/net v0.0.0-20210525063256-abc453219eb5: html.RawNode

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.RawNode 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.RawNode

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:sha256:8cf03283d67f474e26b551283c4cd195f058d4aa14d6f257edc52d3401ca2518","contract":["html.RawNode is a NodeType enum constant equal to 6 and distinct from TextNode, ElementNode, and ErrorNode","html.Render writes html.RawNode Data directly to the output stream without HTML escaping while escaping html.TextNode siblings","html.RawNode with empty Data serializes as an empty string without error","html.Parse does not produce html.RawNode nodes and a RawNode appended into a parsed document tree renders its raw markup in place"],"goal":"verify golang.org/x/net/html.RawNode 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.RawNode"]},"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.RawNode"],"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=

{
  "schemaVersion": 1,
  "goal": "verify golang.org/x/net/html.RawNode 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.RawNode"
  ]
}

package main

import (
	"bytes"
	"fmt"
	"os"
	"strings"

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

func main() {
	// 1. Verify html.RawNode is a NodeType constant distinct from TextNode and ElementNode
	if html.RawNode == html.TextNode || html.RawNode == html.ElementNode || html.RawNode == html.ErrorNode {
		fmt.Fprintf(os.Stderr, "expected RawNode to be distinct from TextNode, ElementNode, ErrorNode\n")
		os.Exit(1)
	}
	if uint32(html.RawNode) != 6 {
		fmt.Fprintf(os.Stderr, "expected RawNode value 6, got %d\n", uint32(html.RawNode))
		os.Exit(1)
	}

	// 2. Verify html.Render writes RawNode Data directly without HTML escaping while escaping TextNode siblings
	div := &html.Node{
		Type: html.ElementNode,
		Data: "div",
	}
	div.AppendChild(&html.Node{
		Type: html.TextNode,
		Data: "<b>escaped</b>",
	})
	div.AppendChild(&html.Node{
		Type: html.RawNode,
		Data: "<i>raw</i>",
	})

	var buf bytes.Buffer
	if err := html.Render(&buf, div); err != nil {
		fmt.Fprintf(os.Stderr, "render failed: %v\n", err)
		os.Exit(1)
	}
	got := buf.String()
	want := "<div>&lt;b&gt;escaped&lt;/b&gt;<i>raw</i></div>"
	if got != want {
		fmt.Fprintf(os.Stderr, "unexpected render output: got %q, want %q\n", got, want)
		os.Exit(1)
	}

	// 3. Verify html.RawNode with empty Data serializes as empty string without error
	buf.Reset()
	emptyRaw := &html.Node{
		Type: html.RawNode,
		Data: "",
	}
	if err := html.Render(&buf, emptyRaw); err != nil {
		fmt.Fprintf(os.Stderr, "empty raw render failed: %v\n", err)
		os.Exit(1)
	}
	if buf.String() != "" {
		fmt.Fprintf(os.Stderr, "expected empty string for empty RawNode, got %q\n", buf.String())
		os.Exit(1)
	}

	// 4. Verify html.Parse does not produce RawNode and appending RawNode into parsed document renders raw markup
	doc, err := html.Parse(strings.NewReader("<html><head></head><body><p>hello</p></body></html>"))
	if err != nil {
		fmt.Fprintf(os.Stderr, "parse failed: %v\n", err)
		os.Exit(1)
	}
	var hasRaw bool
	var walk func(*html.Node)
	walk = func(n *html.Node) {
		if n.Type == html.RawNode {
			hasRaw = true
		}
		for c := n.FirstChild; c != nil; c = c.NextSibling {
			walk(c)
		}
	}
	walk(doc)
	if hasRaw {
		fmt.Fprintf(os.Stderr, "expected html.Parse not to produce RawNode\n")
		os.Exit(1)
	}

	// Find <p> node and append RawNode
	var pNode *html.Node
	var findP func(*html.Node)
	findP = func(n *html.Node) {
		if n.Type == html.ElementNode && n.Data == "p" {
			pNode = n
			return
		}
		for c := n.FirstChild; c != nil; c = c.NextSibling {
			findP(c)
		}
	}
	findP(doc)
	if pNode == nil {
		fmt.Fprintf(os.Stderr, "failed to find <p> node\n")
		os.Exit(1)
	}
	pNode.AppendChild(&html.Node{
		Type: html.RawNode,
		Data: "<span>injected</span>",
	})
	buf.Reset()
	if err := html.Render(&buf, pNode); err != nil {
		fmt.Fprintf(os.Stderr, "render pNode failed: %v\n", err)
		os.Exit(1)
	}
	if buf.String() != "<p>hello<span>injected</span></p>" {
		fmt.Fprintf(os.Stderr, "unexpected pNode render: %q\n", buf.String())
		os.Exit(1)
	}
}