Markdown parser, done right. 100% CommonMark support, extensions, syntax plugins & high speed https://markdown-it.github.io/
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import needle from 'needle'
import assert from 'node:assert'
import crypto from 'node:crypto'
import { Worker as JestWorker } from 'jest-worker'
import { readFileSync } from 'fs'
async function test_pattern (str) {
const worker = new JestWorker(
new URL('./pathological_worker.js', import.meta.url),
{
numWorkers: 1,
enableWorkerThreads: true
}
)
let result
const ac = new AbortController()
try {
result = await Promise.race([
worker.render(str),
new Promise((resolve, reject) => {
setTimeout(() => reject(new Error('Terminated (timeout exceeded)')), 3000).unref()
})
])
} finally {
ac.abort()
await worker.end()
}
return result
}
describe('Pathological sequences speed', () => {
it('Integrity check', async () => {
assert.strictEqual(
await test_pattern('foo'),
'<p>foo</p>\n'
)
})
// Ported from cmark, https://github.com/commonmark/cmark/blob/master/test/pathological_tests.py
describe('Cmark', () => {
it('verify original source crc', async () => {
/* eslint-disable max-len */
const src = await needle('get', 'https://raw.githubusercontent.com/commonmark/cmark/master/test/pathological_tests.py')
const src_md5 = crypto.createHash('md5').update(src.body).digest('hex')
const tracked_md5 = JSON.parse(readFileSync(new URL('./pathological.json', import.meta.url))).md5
assert.strictEqual(
src_md5,
tracked_md5,
'CRC or cmark pathological tests hanged. Verify and update pathological.json'
)
})
it('nested inlines', async () => {
await test_pattern('*'.repeat(60000) + 'a' + '*'.repeat(60000))
})
it('nested strong emph', async () => {
await test_pattern('*a **a '.repeat(5000) + 'b' + ' a** a*'.repeat(5000))
})
it('many emph closers with no openers', async () => {
await test_pattern('a_ '.repeat(30000))
})
it('many emph openers with no closers', async () => {
await test_pattern('_a '.repeat(30000))
})
it('many link closers with no openers', async () => {
await test_pattern('a]'.repeat(10000))
})
it('many link openers with no closers', async () => {
await test_pattern('[a'.repeat(10000))
})
it('mismatched openers and closers', async () => {
await test_pattern('*a_ '.repeat(50000))
})
it('commonmark/cmark#389', async () => {
await test_pattern('*a '.repeat(20000) + '_a*_ '.repeat(20000))
})
it('openers and closers multiple of 3', async () => {
await test_pattern('a**b' + ('c* '.repeat(50000)))
})
it('link openers and emph closers', async () => {
await test_pattern('[ a_'.repeat(10000))
})
it('pattern [ (]( repeated', async () => {
await test_pattern('[ (]('.repeat(40000))
})
it('pattern ![[]() repeated', async () => {
await test_pattern('![[]()'.repeat(20000))
})
it('nested brackets', async () => {
await test_pattern('['.repeat(20000) + 'a' + ']'.repeat(20000))
})
it('nested block quotes', async () => {
await test_pattern('> '.repeat(50000) + 'a')
})
it('deeply nested lists', async () => {
await test_pattern(Array(1000).fill(0).map(function (_, x) { return ' '.repeat(x) + '* a\n' }).join(''))
})
it('U+0000 in input', async () => {
await test_pattern('abc\u0000de\u0000'.repeat(100000))
})
it('backticks', async () => {
await test_pattern(Array(3000).fill(0).map(function (_, x) { return 'e' + '`'.repeat(x) }).join(''))
})
it('unclosed links A', async () => {
await test_pattern('[a](<b'.repeat(30000))
})
it('unclosed links B', async () => {
await test_pattern('[a](b'.repeat(30000))
})
it('unclosed <!--', async () => {
await test_pattern('</' + '<!--'.repeat(100000))
})
it('empty lines in deeply nested lists', async () => {
await test_pattern('- '.repeat(30000) + 'x' + '\n'.repeat(30000))
})
it('empty lines in deeply nested lists in blockquote', async () => {
await test_pattern('> ' + '- '.repeat(30000) + 'x\n' + '>\n'.repeat(30000))
})
it('emph in deep blockquote', async () => {
await test_pattern('>'.repeat(100000) + 'a*'.repeat(100000))
})
})
describe('Markdown-it', () => {
it('emphasis **_* pattern', async () => {
await test_pattern('**_* '.repeat(50000))
})
it('backtick ``\\``\\`` pattern', async () => {
await test_pattern('``\\'.repeat(50000))
})
it('autolinks <<<<...<<> pattern', async () => {
await test_pattern('<'.repeat(400000) + '>')
})
it('hardbreak whitespaces pattern', async () => {
await test_pattern('x' + ' '.repeat(150000) + 'x \nx')
})
})
})