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add fuzzer #112

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20 changes: 20 additions & 0 deletions examples/fuzz/index.html
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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<link rel="icon" type="image/svg+xml" href="data:" />
<title>dhtml fuzzer</title>
<script type="importmap">
{
"imports": {
"dhtml": "./node_modules/dhtml/index.js",
"dhtml/client": "./node_modules/dhtml/client.js",
"dhtml/server": "./node_modules/dhtml/server.js"
}
}
</script>
<script type="module" src="main.js"></script>
</head>
<body></body>
</html>
187 changes: 187 additions & 0 deletions examples/fuzz/main.js
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import { html } from 'dhtml'
import { createRoot } from 'dhtml/client'
import { renderToString } from 'dhtml/server'

function canonicalize(str) {
const t = document.createElement('template')
t.innerHTML = str
return t.innerHTML
}

/**
* @param {...string} strings
* @returns {TemplateStringsArray}
*/
function tsa(...strings) {
return Object.assign(strings, { raw: strings })
}

function tag(name) {
const child = random()

return {
render() {
return html(tsa(`<${name}>`, `</${name}>`), child)
},
toString() {
return `<${name}>${child}</${name}>`
},
}
}
function voidTag(name) {
return {
render() {
return html(tsa(`<${name}>`))
},
toString() {
return `<${name}>`
},
}
}
function text(raw) {
return {
render() {
return raw
},
toString() {
return raw
.replaceAll('&', '&amp;')
.replaceAll('<', '&lt;')
.replaceAll('>', '&gt;')
.replaceAll('"', '&quot;')
.replaceAll("'", '&#39;')
},
}
}
function sequence(length) {
const items = Array.from({ length }, () => random())
return {
render() {
return items
},
toString() {
return items.join('')
},
}
}

const choices = [
() => tag('a'),
() => tag('p'),
() => tag('span'),
() => tag('div'),
() => tag('table'),
() => tag('tbody'),
() => tag('tr'),
() => tag('td'),
() => tag('form'),
() => tag('button'),
() => tag('input'),
() => voidTag('br'),
() => tag('h1'),
() => tag('h2'),
() => tag('h3'),
() => tag('ul'),
() => tag('ol'),
() => tag('li'),
() => tag('section'),
() => tag('article'),
() => tag('header'),
() => tag('footer'),
() => tag('nav'),
() => tag('main'),
() => tag('aside'),
() => tag('strong'),
() => tag('em'),
() => tag('code'),
() => tag('pre'),
() => tag('blockquote'),
() => tag('label'),
() => tag('select'),
() => tag('option'),
// () => tag('textarea'), // causes issues
() => tag('fieldset'),
() => tag('legend'),
() => tag('figure'),
() => tag('figcaption'),
() => tag('caption'),
() => tag('thead'),
() => tag('tfoot'),
() => tag('th'),
() => tag('small'),
() => tag('b'),
() => tag('i'),
() => tag('u'),
() => tag('sub'),
() => tag('sup'),
() => tag('mark'),
() => tag('del'),
() => tag('ins'),
() => tag('abbr'),
() => tag('cite'),
() => tag('q'),
() => tag('dfn'),
() => tag('time'),
() => tag('address'),
() => tag('details'),
() => tag('summary'),
() => tag('dialog'),
() => tag('data'),
() => tag('output'),
() => tag('progress'),
() => tag('meter'),
() => voidTag('hr'),
() => voidTag('img'),
() => voidTag('area'),
() => voidTag('base'),
() => voidTag('col'),
() => voidTag('embed'),
() => voidTag('link'),
() => voidTag('meta'),
() => voidTag('param'),
() => voidTag('source'),
() => voidTag('track'),
() => voidTag('wbr'),
() => text('text'),
() => text(''),
() => text('<hello>'),
() => sequence(2),
() => sequence(3),
() => sequence(4),
() => sequence(5),
() => ({
render: () => null,
toString: () => '',
}),
]
function random() {
return choices[Math.floor(Math.random() * choices.length)]()
}

for (let i = 0; i < 10000; i++) {
const app = random()

const el = document.createElement('div')
const root = createRoot(el)
const str = app.toString()

try {
root.render(app)
} catch (error) {
console.warn(str, app)
throw error
}

const str2 = renderToString(app)

if (str !== str2) {
console.log('ssr mismatch, expected:', str, 'got:', str2)
}

if (canonicalize(str) !== str) continue

if (el.innerHTML !== str) {
console.log('rendering mismatch, expected:', str, 'got:', el.innerHTML)
}
}
console.log('done')
14 changes: 14 additions & 0 deletions examples/fuzz/package.json
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{
"name": "@dhtml-examples/fuzz",
"private": true,
"type": "module",
"scripts": {
"check": "tsc"
},
"devDependencies": {
"typescript": "~5.8.3"
},
"dependencies": {
"dhtml": "file:../../dist"
}
}
11 changes: 11 additions & 0 deletions examples/fuzz/tsconfig.json
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{
"compilerOptions": {
"checkJs": true,
"noEmit": true,
"allowImportingTsExtensions": true,
"verbatimModuleSyntax": true,
"moduleResolution": "bundler",
"module": "preserve",
"target": "es2020"
}
}
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