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runner.mjs
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runner.mjs
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import { EventEmitter, once } from 'node:events'
import { readdirSync, readFileSync, statSync } from 'node:fs'
import { basename, isAbsolute, join, resolve } from 'node:path'
import { fileURLToPath } from 'node:url'
import { Worker } from 'node:worker_threads'
import { parseMeta, handlePipes, normalizeName } from './util.mjs'
const basePath = fileURLToPath(join(import.meta.url, '../../..'))
const testPath = join(basePath, 'tests')
const statusPath = join(basePath, 'status')
export class WPTRunner extends EventEmitter {
/** @type {string} */
#folderName
/** @type {string} */
#folderPath
/** @type {string[]} */
#files = []
/** @type {string[]} */
#initScripts = []
/** @type {string} */
#url
/** @type {import('../../status/fetch.status.json')} */
#status
#stats = {
completed: 0,
failed: 0,
success: 0,
expectedFailures: 0
}
constructor (folder, url) {
super()
this.#folderName = folder
this.#folderPath = join(testPath, folder)
this.#files.push(...WPTRunner.walk(
this.#folderPath,
(file) => file.endsWith('.js')
))
this.#status = JSON.parse(readFileSync(join(statusPath, `${folder}.status.json`)))
this.#url = url
if (this.#files.length === 0) {
queueMicrotask(() => {
this.emit('completion')
})
}
}
static walk (dir, fn) {
const ini = new Set(readdirSync(dir))
const files = new Set()
while (ini.size !== 0) {
for (const d of ini) {
const path = resolve(dir, d)
ini.delete(d) // remove from set
const stats = statSync(path)
if (stats.isDirectory()) {
for (const f of readdirSync(path)) {
ini.add(resolve(path, f))
}
} else if (stats.isFile() && fn(d)) {
files.add(path)
}
}
}
return [...files]
}
async run () {
const workerPath = fileURLToPath(join(import.meta.url, '../worker.mjs'))
for (const test of this.#files) {
const code = test.includes('.sub.')
? handlePipes(readFileSync(test, 'utf-8'), this.#url)
: readFileSync(test, 'utf-8')
const meta = this.resolveMeta(code, test)
const worker = new Worker(workerPath, {
workerData: {
// Code to load before the test harness and tests.
initScripts: this.#initScripts,
// The test file.
test: code,
// Parsed META tag information
meta,
url: this.#url,
path: test
}
})
worker.on('message', (message) => {
if (message.type === 'result') {
this.handleIndividualTestCompletion(message, basename(test))
} else if (message.type === 'completion') {
this.handleTestCompletion(worker)
}
})
await once(worker, 'exit')
}
this.emit('completion')
const { completed, failed, success, expectedFailures } = this.#stats
console.log(
`[${this.#folderName}]: ` +
`Completed: ${completed}, failed: ${failed}, success: ${success}, ` +
`expected failures: ${expectedFailures}, ` +
`unexpected failures: ${failed - expectedFailures}`
)
}
/**
* Called after a test has succeeded or failed.
*/
handleIndividualTestCompletion (message, fileName) {
const { fail, allowUnexpectedFailures, flaky } = this.#status[fileName] ?? {}
if (message.type === 'result') {
this.#stats.completed += 1
if (message.result.status === 1) {
this.#stats.failed += 1
const name = normalizeName(message.result.name)
if (flaky?.includes(name)) {
this.#stats.expectedFailures += 1
} else if (allowUnexpectedFailures || fail?.includes(name)) {
this.#stats.expectedFailures += 1
} else {
process.exitCode = 1
console.error(message.result)
}
} else {
this.#stats.success += 1
}
}
}
/**
* Called after all the tests in a worker are completed.
* @param {Worker} worker
*/
handleTestCompletion (worker) {
worker.terminate()
}
addInitScript (code) {
this.#initScripts.push(code)
}
/**
* Parses META tags and resolves any script file paths.
* @param {string} code
* @param {string} path The absolute path of the test
*/
resolveMeta (code, path) {
const meta = parseMeta(code)
const scripts = meta.scripts.map((filePath) => {
let content = ''
if (filePath === '/resources/WebIDLParser.js') {
// See https://github.com/web-platform-tests/wpt/pull/731
return readFileSync(join(testPath, '/resources/webidl2/lib/webidl2.js'), 'utf-8')
} else if (isAbsolute(filePath)) {
content = readFileSync(join(testPath, filePath), 'utf-8')
} else {
content = readFileSync(resolve(path, '..', filePath), 'utf-8')
}
// If the file has any built-in pipes.
if (filePath.includes('.sub.')) {
content = handlePipes(content, this.#url)
}
return content
})
return {
...meta,
resourcePaths: meta.scripts,
scripts
}
}
}