[backend] fix: 修复异常处理和类型转换问题

frontend/node_modules/fastq/README.md

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+# fastq
+
+![ci][ci-url]
+[![npm version][npm-badge]][npm-url]
+
+Fast, in memory work queue.
+
+Benchmarks (1 million tasks):
+
+* setImmediate: 812ms
+* fastq: 854ms
+* async.queue: 1298ms
+* neoAsync.queue: 1249ms
+
+Obtained on node 12.16.1, on a dedicated server.
+
+If you need zero-overhead series function call, check out
+[fastseries](http://npm.im/fastseries). For zero-overhead parallel
+function call, check out [fastparallel](http://npm.im/fastparallel).
+
+  * <a href="#install">Installation</a>
+  * <a href="#usage">Usage</a>
+  * <a href="#api">API</a>
+  * <a href="#license">Licence &amp; copyright</a>
+
+## Install
+
+`npm i fastq --save`
+
+## Usage (callback API)
+
+```js
+'use strict'
+
+const queue = require('fastq')(worker, 1)
+
+queue.push(42, function (err, result) {
+  if (err) { throw err }
+  console.log('the result is', result)
+})
+
+function worker (arg, cb) {
+  cb(null, arg * 2)
+}
+```
+
+## Usage (promise API)
+
+```js
+const queue = require('fastq').promise(worker, 1)
+
+async function worker (arg) {
+  return arg * 2
+}
+
+async function run () {
+  const result = await queue.push(42)
+  console.log('the result is', result)
+}
+
+run()
+```
+
+### Setting "this"
+
+```js
+'use strict'
+
+const that = { hello: 'world' }
+const queue = require('fastq')(that, worker, 1)
+
+queue.push(42, function (err, result) {
+  if (err) { throw err }
+  console.log(this)
+  console.log('the result is', result)
+})
+
+function worker (arg, cb) {
+  console.log(this)
+  cb(null, arg * 2)
+}
+```
+
+### Using with TypeScript (callback API)
+
+```ts
+'use strict'
+
+import * as fastq from "fastq";
+import type { queue, done } from "fastq";
+
+type Task = {
+  id: number
+}
+
+const q: queue<Task> = fastq(worker, 1)
+
+q.push({ id: 42})
+
+function worker (arg: Task, cb: done) {
+  console.log(arg.id)
+  cb(null)
+}
+```
+
+### Using with TypeScript (promise API)
+
+```ts
+'use strict'
+
+import * as fastq from "fastq";
+import type { queueAsPromised } from "fastq";
+
+type Task = {
+  id: number
+}
+
+const q: queueAsPromised<Task> = fastq.promise(asyncWorker, 1)
+
+q.push({ id: 42}).catch((err) => console.error(err))
+
+async function asyncWorker (arg: Task): Promise<void> {
+  // No need for a try-catch block, fastq handles errors automatically
+  console.log(arg.id)
+}
+```
+
+## API
+
+* <a href="#fastqueue"><code>fastqueue()</code></a>
+* <a href="#push"><code>queue#<b>push()</b></code></a>
+* <a href="#unshift"><code>queue#<b>unshift()</b></code></a>
+* <a href="#pause"><code>queue#<b>pause()</b></code></a>
+* <a href="#resume"><code>queue#<b>resume()</b></code></a>
+* <a href="#idle"><code>queue#<b>idle()</b></code></a>
+* <a href="#length"><code>queue#<b>length()</b></code></a>
+* <a href="#getQueue"><code>queue#<b>getQueue()</b></code></a>
+* <a href="#kill"><code>queue#<b>kill()</b></code></a>
+* <a href="#killAndDrain"><code>queue#<b>killAndDrain()</b></code></a>
+* <a href="#error"><code>queue#<b>error()</b></code></a>
+* <a href="#concurrency"><code>queue#<b>concurrency</b></code></a>
+* <a href="#drain"><code>queue#<b>drain</b></code></a>
+* <a href="#empty"><code>queue#<b>empty</b></code></a>
+* <a href="#saturated"><code>queue#<b>saturated</b></code></a>
+* <a href="#promise"><code>fastqueue.promise()</code></a>
+
+-------------------------------------------------------
+<a name="fastqueue"></a>
+### fastqueue([that], worker, concurrency)
+
+Creates a new queue.
+
+Arguments:
+
+* `that`, optional context of the `worker` function.
+* `worker`, worker function, it would be called with `that` as `this`,
+  if that is specified.
+* `concurrency`, number of concurrent tasks that could be executed in
+  parallel.
+
+-------------------------------------------------------
+<a name="push"></a>
+### queue.push(task, done)
+
+Add a task at the end of the queue. `done(err, result)` will be called
+when the task was processed.
+
+-------------------------------------------------------
+<a name="unshift"></a>
+### queue.unshift(task, done)
+
+Add a task at the beginning of the queue. `done(err, result)` will be called
+when the task was processed.
+
+-------------------------------------------------------
+<a name="pause"></a>
+### queue.pause()
+
+Pause the processing of tasks. Currently worked tasks are not
+stopped.
+
+-------------------------------------------------------
+<a name="resume"></a>
+### queue.resume()
+
+Resume the processing of tasks.
+
+-------------------------------------------------------
+<a name="idle"></a>
+### queue.idle()
+
+Returns `false` if there are tasks being processed or waiting to be processed.
+`true` otherwise.
+
+-------------------------------------------------------
+<a name="length"></a>
+### queue.length()
+
+Returns the number of tasks waiting to be processed (in the queue).
+
+-------------------------------------------------------
+<a name="getQueue"></a>
+### queue.getQueue()
+
+Returns all the tasks be processed (in the queue). Returns empty array when there are no tasks
+
+-------------------------------------------------------
+<a name="kill"></a>
+### queue.kill()
+
+Removes all tasks waiting to be processed, and reset `drain` to an empty
+function.
+
+-------------------------------------------------------
+<a name="killAndDrain"></a>
+### queue.killAndDrain()
+
+Same than `kill` but the `drain` function will be called before reset to empty.
+
+-------------------------------------------------------
+<a name="error"></a>
+### queue.error(handler)
+
+Set a global error handler. `handler(err, task)` will be called
+each time a task is completed, `err` will be not null if the task has thrown an error.
+
+-------------------------------------------------------
+<a name="concurrency"></a>
+### queue.concurrency
+
+Property that returns the number of concurrent tasks that could be executed in
+parallel. It can be altered at runtime.
+
+-------------------------------------------------------
+<a name="paused"></a>
+### queue.paused
+
+Property (Read-Only) that returns `true` when the queue is in a paused state.
+
+-------------------------------------------------------
+<a name="drain"></a>
+### queue.drain
+
+Function that will be called when the last
+item from the queue has been processed by a worker.
+It can be altered at runtime.
+
+-------------------------------------------------------
+<a name="empty"></a>
+### queue.empty
+
+Function that will be called when the last
+item from the queue has been assigned to a worker.
+It can be altered at runtime.
+
+-------------------------------------------------------
+<a name="saturated"></a>
+### queue.saturated
+
+Function that will be called when the queue hits the concurrency
+limit.
+It can be altered at runtime.
+
+-------------------------------------------------------
+<a name="promise"></a>
+### fastqueue.promise([that], worker(arg), concurrency)
+
+Creates a new queue with `Promise` apis. It also offers all the methods
+and properties of the object returned by [`fastqueue`](#fastqueue) with the modified
+[`push`](#pushPromise) and [`unshift`](#unshiftPromise) methods.
+
+Node v10+ is required to use the promisified version.
+
+Arguments:
+* `that`, optional context of the `worker` function.
+* `worker`, worker function, it would be called with `that` as `this`,
+  if that is specified. It MUST return a `Promise`.
+* `concurrency`, number of concurrent tasks that could be executed in
+  parallel.
+
+<a name="pushPromise"></a>
+#### queue.push(task) => Promise
+
+Add a task at the end of the queue. The returned `Promise`  will be fulfilled (rejected)
+when the task is completed successfully (unsuccessfully).
+
+This promise could be ignored as it will not lead to a `'unhandledRejection'`.
+
+<a name="unshiftPromise"></a>
+#### queue.unshift(task) => Promise
+
+Add a task at the beginning of the queue. The returned `Promise`  will be fulfilled (rejected)
+when the task is completed successfully (unsuccessfully).
+
+This promise could be ignored as it will not lead to a `'unhandledRejection'`.
+
+<a name="drained"></a>
+#### queue.drained() => Promise
+
+Wait for the queue to be drained. The returned `Promise` will be resolved when all tasks in the queue have been processed by a worker.
+
+This promise could be ignored as it will not lead to a `'unhandledRejection'`.
+
+## License
+
+ISC
+
+[ci-url]: https://github.com/mcollina/fastq/workflows/ci/badge.svg
+[npm-badge]: https://badge.fury.io/js/fastq.svg
+[npm-url]: https://badge.fury.io/js/fastq

frontend/node_modules/fastq/SECURITY.md

@@ -0,0 +1,15 @@
+# Security Policy
+
+## Supported Versions
+
+Use this section to tell people about which versions of your project are
+currently being supported with security updates.
+
+| Version | Supported          |
+| ------- | ------------------ |
+| 1.x     | :white_check_mark: |
+| < 1.0   | :x:                |
+
+## Reporting a Vulnerability
+
+Please report all vulnerabilities at [https://github.com/mcollina/fastq/security](https://github.com/mcollina/fastq/security).

frontend/node_modules/fastq/example.mjs

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+import { promise as queueAsPromised } from './queue.js'
+
+const queue = queueAsPromised(worker, 1)
+
+console.log('the result is', await queue.push(42))
+
+async function worker (arg) {
+  return 42 * 2
+}

frontend/node_modules/fastq/index.d.ts

@@ -0,0 +1,59 @@
+declare function fastq<C, T = any, R = any>(context: C, worker: fastq.worker<C, T, R>, concurrency: number): fastq.queue<T, R>
+declare function fastq<C, T = any, R = any>(worker: fastq.worker<C, T, R>, concurrency: number): fastq.queue<T, R>
+
+declare namespace fastq {
+  type worker<C, T = any, R = any> = (this: C, task: T, cb: fastq.done<R>) => void
+  type asyncWorker<C, T = any, R = any> = (this: C, task: T) => Promise<R>
+  type done<R = any> = (err: Error | null, result?: R) => void
+  type errorHandler<T = any> = (err: Error, task: T) => void
+
+  interface queue<T = any, R = any> {
+    /** Add a task at the end of the queue. `done(err, result)` will be called when the task was processed. */
+    push(task: T, done?: done<R>): void
+    /** Add a task at the beginning of the queue. `done(err, result)` will be called when the task was processed. */
+    unshift(task: T, done?: done<R>): void
+    /** Pause the processing of tasks. Currently worked tasks are not stopped. */
+    pause(): any
+    /** Resume the processing of tasks. */
+    resume(): any
+    running(): number
+    /** Returns `false` if there are tasks being processed or waiting to be processed. `true` otherwise. */
+    idle(): boolean
+    /** Returns the number of tasks waiting to be processed (in the queue). */
+    length(): number
+    /** Returns all the tasks be processed (in the queue). Returns empty array when there are no tasks */
+    getQueue(): T[]
+    /** Removes all tasks waiting to be processed, and reset `drain` to an empty function. */
+    kill(): any
+    /** Same than `kill` but the `drain` function will be called before reset to empty. */
+    killAndDrain(): any
+    /** Removes all tasks waiting to be processed, calls each task's callback with an abort error (rejects promises for promise-based queues), and resets `drain` to an empty function. */
+    abort(): any
+    /** Set a global error handler. `handler(err, task)` will be called each time a task is completed, `err` will be not null if the task has thrown an error. */
+    error(handler: errorHandler<T>): void
+    /** Property that returns the number of concurrent tasks that could be executed in parallel. It can be altered at runtime. */
+    concurrency: number
+    /** Property (Read-Only) that returns `true` when the queue is in a paused state. */
+    readonly paused: boolean
+    /** Function that will be called when the last item from the queue has been processed by a worker. It can be altered at runtime. */
+    drain(): any
+    /** Function that will be called when the last item from the queue has been assigned to a worker. It can be altered at runtime. */
+    empty: () => void
+    /** Function that will be called when the queue hits the concurrency limit. It can be altered at runtime. */
+    saturated: () => void
+  }
+
+  interface queueAsPromised<T = any, R = any> extends queue<T, R> {
+    /** Add a task at the end of the queue. The returned `Promise` will be fulfilled (rejected) when the task is completed successfully (unsuccessfully). */
+    push(task: T): Promise<R>
+    /** Add a task at the beginning of the queue. The returned `Promise` will be fulfilled (rejected) when the task is completed successfully (unsuccessfully). */
+    unshift(task: T): Promise<R>
+    /** Wait for the queue to be drained. The returned `Promise` will be resolved when all tasks in the queue have been processed by a worker. */
+    drained(): Promise<void>
+  }
+
+  function promise<C, T = any, R = any>(context: C, worker: fastq.asyncWorker<C, T, R>, concurrency: number): fastq.queueAsPromised<T, R>
+  function promise<C, T = any, R = any>(worker: fastq.asyncWorker<C, T, R>, concurrency: number): fastq.queueAsPromised<T, R>
+}
+
+export = fastq

frontend/node_modules/fastq/package.json

@@ -0,0 +1,49 @@
+{
+  "name": "fastq",
+  "version": "1.20.1",
+  "description": "Fast, in memory work queue",
+  "main": "queue.js",
+  "type": "commonjs",
+  "scripts": {
+    "lint": "eslint .",
+    "unit": "nyc --lines 100 --branches 100 --functions 100 --check-coverage --reporter=text tape test/test.js test/promise.js",
+    "coverage": "nyc --reporter=html --reporter=cobertura --reporter=text tape test/test.js test/promise.js",
+    "test:report": "npm run lint && npm run unit:report",
+    "test": "npm run lint && npm run unit",
+    "typescript": "tsc --project ./test/tsconfig.json",
+    "legacy": "tape test/test.js"
+  },
+  "pre-commit": [
+    "test",
+    "typescript"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/mcollina/fastq.git"
+  },
+  "keywords": [
+    "fast",
+    "queue",
+    "async",
+    "worker"
+  ],
+  "author": "Matteo Collina <hello@matteocollina.com>",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/mcollina/fastq/issues"
+  },
+  "homepage": "https://github.com/mcollina/fastq#readme",
+  "devDependencies": {
+    "async": "^3.1.0",
+    "eslint": "^9.36.0",
+    "neo-async": "^2.6.1",
+    "neostandard": "^0.12.2",
+    "nyc": "^17.0.0",
+    "pre-commit": "^1.2.2",
+    "tape": "^5.0.0",
+    "typescript": "^5.0.4"
+  },
+  "dependencies": {
+    "reusify": "^1.0.4"
+  }
+}

frontend/node_modules/fastq/queue.js

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+'use strict'
+
+/* eslint-disable no-var */
+
+var reusify = require('reusify')
+
+function fastqueue (context, worker, _concurrency) {
+  if (typeof context === 'function') {
+    _concurrency = worker
+    worker = context
+    context = null
+  }
+
+  if (!(_concurrency >= 1)) {
+    throw new Error('fastqueue concurrency must be equal to or greater than 1')
+  }
+
+  var cache = reusify(Task)
+  var queueHead = null
+  var queueTail = null
+  var _running = 0
+  var errorHandler = null
+
+  var self = {
+    push: push,
+    drain: noop,
+    saturated: noop,
+    pause: pause,
+    paused: false,
+
+    get concurrency () {
+      return _concurrency
+    },
+    set concurrency (value) {
+      if (!(value >= 1)) {
+        throw new Error('fastqueue concurrency must be equal to or greater than 1')
+      }
+      _concurrency = value
+
+      if (self.paused) return
+      for (; queueHead && _running < _concurrency;) {
+        _running++
+        release()
+      }
+    },
+
+    running: running,
+    resume: resume,
+    idle: idle,
+    length: length,
+    getQueue: getQueue,
+    unshift: unshift,
+    empty: noop,
+    kill: kill,
+    killAndDrain: killAndDrain,
+    error: error,
+    abort: abort
+  }
+
+  return self
+
+  function running () {
+    return _running
+  }
+
+  function pause () {
+    self.paused = true
+  }
+
+  function length () {
+    var current = queueHead
+    var counter = 0
+
+    while (current) {
+      current = current.next
+      counter++
+    }
+
+    return counter
+  }
+
+  function getQueue () {
+    var current = queueHead
+    var tasks = []
+
+    while (current) {
+      tasks.push(current.value)
+      current = current.next
+    }
+
+    return tasks
+  }
+
+  function resume () {
+    if (!self.paused) return
+    self.paused = false
+    if (queueHead === null) {
+      _running++
+      release()
+      return
+    }
+    for (; queueHead && _running < _concurrency;) {
+      _running++
+      release()
+    }
+  }
+
+  function idle () {
+    return _running === 0 && self.length() === 0
+  }
+
+  function push (value, done) {
+    var current = cache.get()
+
+    current.context = context
+    current.release = release
+    current.value = value
+    current.callback = done || noop
+    current.errorHandler = errorHandler
+
+    if (_running >= _concurrency || self.paused) {
+      if (queueTail) {
+        queueTail.next = current
+        queueTail = current
+      } else {
+        queueHead = current
+        queueTail = current
+        self.saturated()
+      }
+    } else {
+      _running++
+      worker.call(context, current.value, current.worked)
+    }
+  }
+
+  function unshift (value, done) {
+    var current = cache.get()
+
+    current.context = context
+    current.release = release
+    current.value = value
+    current.callback = done || noop
+    current.errorHandler = errorHandler
+
+    if (_running >= _concurrency || self.paused) {
+      if (queueHead) {
+        current.next = queueHead
+        queueHead = current
+      } else {
+        queueHead = current
+        queueTail = current
+        self.saturated()
+      }
+    } else {
+      _running++
+      worker.call(context, current.value, current.worked)
+    }
+  }
+
+  function release (holder) {
+    if (holder) {
+      cache.release(holder)
+    }
+    var next = queueHead
+    if (next && _running <= _concurrency) {
+      if (!self.paused) {
+        if (queueTail === queueHead) {
+          queueTail = null
+        }
+        queueHead = next.next
+        next.next = null
+        worker.call(context, next.value, next.worked)
+        if (queueTail === null) {
+          self.empty()
+        }
+      } else {
+        _running--
+      }
+    } else if (--_running === 0) {
+      self.drain()
+    }
+  }
+
+  function kill () {
+    queueHead = null
+    queueTail = null
+    self.drain = noop
+  }
+
+  function killAndDrain () {
+    queueHead = null
+    queueTail = null
+    self.drain()
+    self.drain = noop
+  }
+
+  function abort () {
+    var current = queueHead
+    queueHead = null
+    queueTail = null
+
+    while (current) {
+      var next = current.next
+      var callback = current.callback
+      var errorHandler = current.errorHandler
+      var val = current.value
+      var context = current.context
+
+      // Reset the task state
+      current.value = null
+      current.callback = noop
+      current.errorHandler = null
+
+      // Call error handler if present
+      if (errorHandler) {
+        errorHandler(new Error('abort'), val)
+      }
+
+      // Call callback with error
+      callback.call(context, new Error('abort'))
+
+      // Release the task back to the pool
+      current.release(current)
+
+      current = next
+    }
+
+    self.drain = noop
+  }
+
+  function error (handler) {
+    errorHandler = handler
+  }
+}
+
+function noop () {}
+
+function Task () {
+  this.value = null
+  this.callback = noop
+  this.next = null
+  this.release = noop
+  this.context = null
+  this.errorHandler = null
+
+  var self = this
+
+  this.worked = function worked (err, result) {
+    var callback = self.callback
+    var errorHandler = self.errorHandler
+    var val = self.value
+    self.value = null
+    self.callback = noop
+    if (self.errorHandler) {
+      errorHandler(err, val)
+    }
+    callback.call(self.context, err, result)
+    self.release(self)
+  }
+}
+
+function queueAsPromised (context, worker, _concurrency) {
+  if (typeof context === 'function') {
+    _concurrency = worker
+    worker = context
+    context = null
+  }
+
+  function asyncWrapper (arg, cb) {
+    worker.call(this, arg)
+      .then(function (res) {
+        cb(null, res)
+      }, cb)
+  }
+
+  var queue = fastqueue(context, asyncWrapper, _concurrency)
+
+  var pushCb = queue.push
+  var unshiftCb = queue.unshift
+
+  queue.push = push
+  queue.unshift = unshift
+  queue.drained = drained
+
+  return queue
+
+  function push (value) {
+    var p = new Promise(function (resolve, reject) {
+      pushCb(value, function (err, result) {
+        if (err) {
+          reject(err)
+          return
+        }
+        resolve(result)
+      })
+    })
+
+    // Let's fork the promise chain to
+    // make the error bubble up to the user but
+    // not lead to a unhandledRejection
+    p.catch(noop)
+
+    return p
+  }
+
+  function unshift (value) {
+    var p = new Promise(function (resolve, reject) {
+      unshiftCb(value, function (err, result) {
+        if (err) {
+          reject(err)
+          return
+        }
+        resolve(result)
+      })
+    })
+
+    // Let's fork the promise chain to
+    // make the error bubble up to the user but
+    // not lead to a unhandledRejection
+    p.catch(noop)
+
+    return p
+  }
+
+  function drained () {
+    var p = new Promise(function (resolve) {
+      process.nextTick(function () {
+        if (queue.idle()) {
+          resolve()
+        } else {
+          var previousDrain = queue.drain
+          queue.drain = function () {
+            if (typeof previousDrain === 'function') previousDrain()
+            resolve()
+            queue.drain = previousDrain
+          }
+        }
+      })
+    })
+
+    return p
+  }
+}
+
+module.exports = fastqueue
+module.exports.promise = queueAsPromised

frontend/node_modules/fastq/test/example.ts

@@ -0,0 +1,83 @@
+import * as fastq from '../'
+import { promise as queueAsPromised } from '../'
+
+// Basic example
+
+const queue = fastq(worker, 1)
+
+queue.push('world', (err, result) => {
+  if (err) throw err
+  console.log('the result is', result)
+})
+
+queue.push('push without cb')
+
+queue.concurrency
+
+queue.drain()
+
+queue.empty = () => undefined
+
+console.log('the queue tasks are', queue.getQueue())
+
+queue.idle()
+
+queue.kill()
+
+queue.killAndDrain()
+
+queue.length
+
+queue.pause()
+
+queue.resume()
+
+queue.running()
+
+queue.saturated = () => undefined
+
+queue.unshift('world', (err, result) => {
+  if (err) throw err
+  console.log('the result is', result)
+})
+
+queue.unshift('unshift without cb')
+
+function worker(task: any, cb: fastq.done) {
+  cb(null, 'hello ' + task)
+}
+
+// Generics example
+
+interface GenericsContext {
+  base: number;
+}
+
+const genericsQueue = fastq<GenericsContext, number, string>({ base: 6 }, genericsWorker, 1)
+
+genericsQueue.push(7, (err, done) => {
+  if (err) throw err
+  console.log('the result is', done)
+})
+
+genericsQueue.unshift(7, (err, done) => {
+  if (err) throw err
+  console.log('the result is', done)
+})
+
+function genericsWorker(this: GenericsContext, task: number, cb: fastq.done<string>) {
+  cb(null, 'the meaning of life is ' + (this.base * task))
+}
+
+const queue2 = queueAsPromised(asyncWorker, 1)
+
+async function asyncWorker(task: any) {
+  return 'hello ' + task
+}
+
+async function run () {
+  await queue.push(42)
+  await queue.unshift(42)
+}
+
+run()

frontend/node_modules/fastq/test/promise.js

@@ -0,0 +1,325 @@
+'use strict'
+
+const test = require('tape')
+const buildQueue = require('../').promise
+const { promisify } = require('util')
+const sleep = promisify(setTimeout)
+const immediate = promisify(setImmediate)
+
+test('concurrency', function (t) {
+  t.plan(2)
+  t.throws(buildQueue.bind(null, worker, 0))
+  t.doesNotThrow(buildQueue.bind(null, worker, 1))
+
+  async function worker (arg) {
+    return true
+  }
+})
+
+test('worker execution', async function (t) {
+  const queue = buildQueue(worker, 1)
+
+  const result = await queue.push(42)
+
+  t.equal(result, true, 'result matches')
+
+  async function worker (arg) {
+    t.equal(arg, 42)
+    return true
+  }
+})
+
+test('limit', async function (t) {
+  const queue = buildQueue(worker, 1)
+
+  const [res1, res2] = await Promise.all([queue.push(10), queue.push(0)])
+  t.equal(res1, 10, 'the result matches')
+  t.equal(res2, 0, 'the result matches')
+
+  async function worker (arg) {
+    await sleep(arg)
+    return arg
+  }
+})
+
+test('multiple executions', async function (t) {
+  const queue = buildQueue(worker, 1)
+  const toExec = [1, 2, 3, 4, 5]
+  const expected = ['a', 'b', 'c', 'd', 'e']
+  let count = 0
+
+  await Promise.all(toExec.map(async function (task, i) {
+    const result = await queue.push(task)
+    t.equal(result, expected[i], 'the result matches')
+  }))
+
+  async function worker (arg) {
+    t.equal(arg, toExec[count], 'arg matches')
+    return expected[count++]
+  }
+})
+
+test('drained', async function (t) {
+  const queue = buildQueue(worker, 2)
+
+  const toExec = new Array(10).fill(10)
+  let count = 0
+
+  async function worker (arg) {
+    await sleep(arg)
+    count++
+  }
+
+  toExec.forEach(function (i) {
+    queue.push(i)
+  })
+
+  await queue.drained()
+
+  t.equal(count, toExec.length)
+
+  toExec.forEach(function (i) {
+    queue.push(i)
+  })
+
+  await queue.drained()
+
+  t.equal(count, toExec.length * 2)
+})
+
+test('drained with exception should not throw', async function (t) {
+  const queue = buildQueue(worker, 2)
+
+  const toExec = new Array(10).fill(10)
+
+  async function worker () {
+    throw new Error('foo')
+  }
+
+  toExec.forEach(function (i) {
+    queue.push(i)
+  })
+
+  await queue.drained()
+})
+
+test('drained with drain function', async function (t) {
+  let drainCalled = false
+  const queue = buildQueue(worker, 2)
+
+  queue.drain = function () {
+    drainCalled = true
+  }
+
+  const toExec = new Array(10).fill(10)
+  let count = 0
+
+  async function worker (arg) {
+    await sleep(arg)
+    count++
+  }
+
+  toExec.forEach(function () {
+    queue.push()
+  })
+
+  await queue.drained()
+
+  t.equal(count, toExec.length)
+  t.equal(drainCalled, true)
+})
+
+test('drained while idle should resolve', async function (t) {
+  const queue = buildQueue(worker, 2)
+
+  async function worker (arg) {
+    await sleep(arg)
+  }
+
+  await queue.drained()
+})
+
+test('drained while idle should not call the drain function', async function (t) {
+  let drainCalled = false
+  const queue = buildQueue(worker, 2)
+
+  queue.drain = function () {
+    drainCalled = true
+  }
+
+  async function worker (arg) {
+    await sleep(arg)
+  }
+
+  await queue.drained()
+
+  t.equal(drainCalled, false)
+})
+
+test('set this', async function (t) {
+  t.plan(1)
+  const that = {}
+  const queue = buildQueue(that, worker, 1)
+
+  await queue.push(42)
+
+  async function worker (arg) {
+    t.equal(this, that, 'this matches')
+  }
+})
+
+test('unshift', async function (t) {
+  const queue = buildQueue(worker, 1)
+  const expected = [1, 2, 3, 4]
+
+  await Promise.all([
+    queue.push(1),
+    queue.push(4),
+    queue.unshift(3),
+    queue.unshift(2)
+  ])
+
+  t.is(expected.length, 0)
+
+  async function worker (arg) {
+    t.equal(expected.shift(), arg, 'tasks come in order')
+  }
+})
+
+test('push with worker throwing error', async function (t) {
+  t.plan(5)
+  const q = buildQueue(async function (task, cb) {
+    throw new Error('test error')
+  }, 1)
+  q.error(function (err, task) {
+    t.ok(err instanceof Error, 'global error handler should catch the error')
+    t.match(err.message, /test error/, 'error message should be "test error"')
+    t.equal(task, 42, 'The task executed should be passed')
+  })
+  try {
+    await q.push(42)
+  } catch (err) {
+    t.ok(err instanceof Error, 'push callback should catch the error')
+    t.match(err.message, /test error/, 'error message should be "test error"')
+  }
+})
+
+test('unshift with worker throwing error', async function (t) {
+  t.plan(2)
+  const q = buildQueue(async function (task, cb) {
+    throw new Error('test error')
+  }, 1)
+  try {
+    await q.unshift(42)
+  } catch (err) {
+    t.ok(err instanceof Error, 'push callback should catch the error')
+    t.match(err.message, /test error/, 'error message should be "test error"')
+  }
+})
+
+test('no unhandledRejection (push)', async function (t) {
+  function handleRejection () {
+    t.fail('unhandledRejection')
+  }
+  process.once('unhandledRejection', handleRejection)
+  const q = buildQueue(async function (task, cb) {
+    throw new Error('test error')
+  }, 1)
+
+  q.push(42)
+
+  await immediate()
+  process.removeListener('unhandledRejection', handleRejection)
+})
+
+test('no unhandledRejection (unshift)', async function (t) {
+  function handleRejection () {
+    t.fail('unhandledRejection')
+  }
+  process.once('unhandledRejection', handleRejection)
+  const q = buildQueue(async function (task, cb) {
+    throw new Error('test error')
+  }, 1)
+
+  q.unshift(42)
+
+  await immediate()
+  process.removeListener('unhandledRejection', handleRejection)
+})
+
+test('drained should resolve after async tasks complete', async function (t) {
+  const logs = []
+
+  async function processTask () {
+    await new Promise(resolve => setTimeout(resolve, 0))
+    logs.push('processed')
+  }
+
+  const queue = buildQueue(processTask, 1)
+  queue.drain = () => logs.push('called drain')
+
+  queue.drained().then(() => logs.push('drained promise resolved'))
+
+  await Promise.all([
+    queue.push(),
+    queue.push(),
+    queue.push()
+  ])
+
+  t.deepEqual(logs, [
+    'processed',
+    'processed',
+    'processed',
+    'called drain',
+    'drained promise resolved'
+  ], 'events happened in correct order')
+})
+
+test('drained should handle undefined drain function', async function (t) {
+  const queue = buildQueue(worker, 1)
+
+  async function worker (arg) {
+    await sleep(10)
+    return arg
+  }
+
+  queue.drain = undefined
+  queue.push(1)
+  await queue.drained()
+
+  t.pass('drained resolved successfully with undefined drain')
+})
+
+test('abort rejects all pending promises', async function (t) {
+  const queue = buildQueue(worker, 1)
+  const promises = []
+  let rejectedCount = 0
+
+  // Pause queue to prevent tasks from starting
+  queue.pause()
+
+  for (let i = 0; i < 10; i++) {
+    promises.push(queue.push(i))
+  }
+
+  queue.abort()
+
+  // All promises should be rejected
+  for (const promise of promises) {
+    try {
+      await promise
+      t.fail('promise should have been rejected')
+    } catch (err) {
+      t.equal(err.message, 'abort', 'error message is abort')
+      rejectedCount++
+    }
+  }
+
+  t.equal(rejectedCount, 10, 'all promises were rejected')
+  t.equal(queue.length(), 0, 'queue is empty')
+
+  async function worker (arg) {
+    await sleep(500)
+    return arg
+  }
+})

frontend/node_modules/fastq/test/test.js

@@ -0,0 +1,733 @@
+'use strict'
+
+/* eslint-disable no-var */
+
+var test = require('tape')
+var buildQueue = require('../')
+
+test('concurrency', function (t) {
+  t.plan(6)
+  t.throws(buildQueue.bind(null, worker, 0))
+  t.throws(buildQueue.bind(null, worker, NaN))
+  t.doesNotThrow(buildQueue.bind(null, worker, 1))
+
+  var queue = buildQueue(worker, 1)
+  t.throws(function () {
+    queue.concurrency = 0
+  })
+  t.throws(function () {
+    queue.concurrency = NaN
+  })
+  t.doesNotThrow(function () {
+    queue.concurrency = 2
+  })
+
+  function worker (arg, cb) {
+    cb(null, true)
+  }
+})
+
+test('worker execution', function (t) {
+  t.plan(3)
+
+  var queue = buildQueue(worker, 1)
+
+  queue.push(42, function (err, result) {
+    t.error(err, 'no error')
+    t.equal(result, true, 'result matches')
+  })
+
+  function worker (arg, cb) {
+    t.equal(arg, 42)
+    cb(null, true)
+  }
+})
+
+test('limit', function (t) {
+  t.plan(4)
+
+  var expected = [10, 0]
+  var queue = buildQueue(worker, 1)
+
+  queue.push(10, result)
+  queue.push(0, result)
+
+  function result (err, arg) {
+    t.error(err, 'no error')
+    t.equal(arg, expected.shift(), 'the result matches')
+  }
+
+  function worker (arg, cb) {
+    setTimeout(cb, arg, null, arg)
+  }
+})
+
+test('multiple executions', function (t) {
+  t.plan(15)
+
+  var queue = buildQueue(worker, 1)
+  var toExec = [1, 2, 3, 4, 5]
+  var count = 0
+
+  toExec.forEach(function (task) {
+    queue.push(task, done)
+  })
+
+  function done (err, result) {
+    t.error(err, 'no error')
+    t.equal(result, toExec[count - 1], 'the result matches')
+  }
+
+  function worker (arg, cb) {
+    t.equal(arg, toExec[count], 'arg matches')
+    count++
+    setImmediate(cb, null, arg)
+  }
+})
+
+test('multiple executions, one after another', function (t) {
+  t.plan(15)
+
+  var queue = buildQueue(worker, 1)
+  var toExec = [1, 2, 3, 4, 5]
+  var count = 0
+
+  queue.push(toExec[0], done)
+
+  function done (err, result) {
+    t.error(err, 'no error')
+    t.equal(result, toExec[count - 1], 'the result matches')
+    if (count < toExec.length) {
+      queue.push(toExec[count], done)
+    }
+  }
+
+  function worker (arg, cb) {
+    t.equal(arg, toExec[count], 'arg matches')
+    count++
+    setImmediate(cb, null, arg)
+  }
+})
+
+test('set this', function (t) {
+  t.plan(3)
+
+  var that = {}
+  var queue = buildQueue(that, worker, 1)
+
+  queue.push(42, function (err, result) {
+    t.error(err, 'no error')
+    t.equal(this, that, 'this matches')
+  })
+
+  function worker (arg, cb) {
+    t.equal(this, that, 'this matches')
+    cb(null, true)
+  }
+})
+
+test('drain', function (t) {
+  t.plan(4)
+
+  var queue = buildQueue(worker, 1)
+  var worked = false
+
+  queue.push(42, function (err, result) {
+    t.error(err, 'no error')
+    t.equal(result, true, 'result matches')
+  })
+
+  queue.drain = function () {
+    t.equal(true, worked, 'drained')
+  }
+
+  function worker (arg, cb) {
+    t.equal(arg, 42)
+    worked = true
+    setImmediate(cb, null, true)
+  }
+})
+
+test('pause && resume', function (t) {
+  t.plan(13)
+
+  var queue = buildQueue(worker, 1)
+  var worked = false
+  var expected = [42, 24]
+
+  t.notOk(queue.paused, 'it should not be paused')
+
+  queue.pause()
+
+  queue.push(42, function (err, result) {
+    t.error(err, 'no error')
+    t.equal(result, true, 'result matches')
+  })
+
+  queue.push(24, function (err, result) {
+    t.error(err, 'no error')
+    t.equal(result, true, 'result matches')
+  })
+
+  t.notOk(worked, 'it should be paused')
+  t.ok(queue.paused, 'it should be paused')
+
+  queue.resume()
+  queue.pause()
+  queue.resume()
+  queue.resume() // second resume is a no-op
+
+  function worker (arg, cb) {
+    t.notOk(queue.paused, 'it should not be paused')
+    t.ok(queue.running() <= queue.concurrency, 'should respect the concurrency')
+    t.equal(arg, expected.shift())
+    worked = true
+    process.nextTick(function () { cb(null, true) })
+  }
+})
+
+test('pause in flight && resume', function (t) {
+  t.plan(16)
+
+  var queue = buildQueue(worker, 1)
+  var expected = [42, 24, 12]
+
+  t.notOk(queue.paused, 'it should not be paused')
+
+  queue.push(42, function (err, result) {
+    t.error(err, 'no error')
+    t.equal(result, true, 'result matches')
+    t.ok(queue.paused, 'it should be paused')
+    process.nextTick(function () {
+      queue.resume()
+      queue.pause()
+      queue.resume()
+    })
+  })
+
+  queue.push(24, function (err, result) {
+    t.error(err, 'no error')
+    t.equal(result, true, 'result matches')
+    t.notOk(queue.paused, 'it should not be paused')
+  })
+
+  queue.push(12, function (err, result) {
+    t.error(err, 'no error')
+    t.equal(result, true, 'result matches')
+    t.notOk(queue.paused, 'it should not be paused')
+  })
+
+  queue.pause()
+
+  function worker (arg, cb) {
+    t.ok(queue.running() <= queue.concurrency, 'should respect the concurrency')
+    t.equal(arg, expected.shift())
+    process.nextTick(function () { cb(null, true) })
+  }
+})
+
+test('altering concurrency', function (t) {
+  t.plan(24)
+
+  var queue = buildQueue(worker, 1)
+
+  queue.push(24, workDone)
+  queue.push(24, workDone)
+  queue.push(24, workDone)
+
+  queue.pause()
+
+  queue.concurrency = 3 // concurrency changes are ignored while paused
+  queue.concurrency = 2
+
+  queue.resume()
+
+  t.equal(queue.running(), 2, '2 jobs running')
+
+  queue.concurrency = 3
+
+  t.equal(queue.running(), 3, '3 jobs running')
+
+  queue.concurrency = 1
+
+  t.equal(queue.running(), 3, '3 jobs running') // running jobs can't be killed
+
+  queue.push(24, workDone)
+  queue.push(24, workDone)
+  queue.push(24, workDone)
+  queue.push(24, workDone)
+
+  function workDone (err, result) {
+    t.error(err, 'no error')
+    t.equal(result, true, 'result matches')
+  }
+
+  function worker (arg, cb) {
+    t.ok(queue.running() <= queue.concurrency, 'should respect the concurrency')
+    setImmediate(function () {
+      cb(null, true)
+    })
+  }
+})
+
+test('idle()', function (t) {
+  t.plan(12)
+
+  var queue = buildQueue(worker, 1)
+
+  t.ok(queue.idle(), 'queue is idle')
+
+  queue.push(42, function (err, result) {
+    t.error(err, 'no error')
+    t.equal(result, true, 'result matches')
+    t.notOk(queue.idle(), 'queue is not idle')
+  })
+
+  queue.push(42, function (err, result) {
+    t.error(err, 'no error')
+    t.equal(result, true, 'result matches')
+    // it will go idle after executing this function
+    setImmediate(function () {
+      t.ok(queue.idle(), 'queue is now idle')
+    })
+  })
+
+  t.notOk(queue.idle(), 'queue is not idle')
+
+  function worker (arg, cb) {
+    t.notOk(queue.idle(), 'queue is not idle')
+    t.equal(arg, 42)
+    setImmediate(cb, null, true)
+  }
+})
+
+test('saturated', function (t) {
+  t.plan(9)
+
+  var queue = buildQueue(worker, 1)
+  var preworked = 0
+  var worked = 0
+
+  queue.saturated = function () {
+    t.pass('saturated')
+    t.equal(preworked, 1, 'started 1 task')
+    t.equal(worked, 0, 'worked zero task')
+  }
+
+  queue.push(42, done)
+  queue.push(42, done)
+
+  function done (err, result) {
+    t.error(err, 'no error')
+    t.equal(result, true, 'result matches')
+  }
+
+  function worker (arg, cb) {
+    t.equal(arg, 42)
+    preworked++
+    setImmediate(function () {
+      worked++
+      cb(null, true)
+    })
+  }
+})
+
+test('length', function (t) {
+  t.plan(7)
+
+  var queue = buildQueue(worker, 1)
+
+  t.equal(queue.length(), 0, 'nothing waiting')
+  queue.push(42, done)
+  t.equal(queue.length(), 0, 'nothing waiting')
+  queue.push(42, done)
+  t.equal(queue.length(), 1, 'one task waiting')
+  queue.push(42, done)
+  t.equal(queue.length(), 2, 'two tasks waiting')
+
+  function done (err, result) {
+    t.error(err, 'no error')
+  }
+
+  function worker (arg, cb) {
+    setImmediate(function () {
+      cb(null, true)
+    })
+  }
+})
+
+test('getQueue', function (t) {
+  t.plan(10)
+
+  var queue = buildQueue(worker, 1)
+
+  t.equal(queue.getQueue().length, 0, 'nothing waiting')
+  queue.push(42, done)
+  t.equal(queue.getQueue().length, 0, 'nothing waiting')
+  queue.push(42, done)
+  t.equal(queue.getQueue().length, 1, 'one task waiting')
+  t.equal(queue.getQueue()[0], 42, 'should be equal')
+  queue.push(43, done)
+  t.equal(queue.getQueue().length, 2, 'two tasks waiting')
+  t.equal(queue.getQueue()[0], 42, 'should be equal')
+  t.equal(queue.getQueue()[1], 43, 'should be equal')
+
+  function done (err, result) {
+    t.error(err, 'no error')
+  }
+
+  function worker (arg, cb) {
+    setImmediate(function () {
+      cb(null, true)
+    })
+  }
+})
+
+test('unshift', function (t) {
+  t.plan(8)
+
+  var queue = buildQueue(worker, 1)
+  var expected = [1, 2, 3, 4]
+
+  queue.push(1, done)
+  queue.push(4, done)
+  queue.unshift(3, done)
+  queue.unshift(2, done)
+
+  function done (err, result) {
+    t.error(err, 'no error')
+  }
+
+  function worker (arg, cb) {
+    t.equal(expected.shift(), arg, 'tasks come in order')
+    setImmediate(function () {
+      cb(null, true)
+    })
+  }
+})
+
+test('unshift && empty', function (t) {
+  t.plan(2)
+
+  var queue = buildQueue(worker, 1)
+  var completed = false
+
+  queue.pause()
+
+  queue.empty = function () {
+    t.notOk(completed, 'the task has not completed yet')
+  }
+
+  queue.unshift(1, done)
+
+  queue.resume()
+
+  function done (err, result) {
+    completed = true
+    t.error(err, 'no error')
+  }
+
+  function worker (arg, cb) {
+    setImmediate(function () {
+      cb(null, true)
+    })
+  }
+})
+
+test('push && empty', function (t) {
+  t.plan(2)
+
+  var queue = buildQueue(worker, 1)
+  var completed = false
+
+  queue.pause()
+
+  queue.empty = function () {
+    t.notOk(completed, 'the task has not completed yet')
+  }
+
+  queue.push(1, done)
+
+  queue.resume()
+
+  function done (err, result) {
+    completed = true
+    t.error(err, 'no error')
+  }
+
+  function worker (arg, cb) {
+    setImmediate(function () {
+      cb(null, true)
+    })
+  }
+})
+
+test('kill', function (t) {
+  t.plan(5)
+
+  var queue = buildQueue(worker, 1)
+  var expected = [1]
+
+  var predrain = queue.drain
+
+  queue.drain = function drain () {
+    t.fail('drain should never be called')
+  }
+
+  queue.push(1, done)
+  queue.push(4, done)
+  queue.unshift(3, done)
+  queue.unshift(2, done)
+  queue.kill()
+
+  function done (err, result) {
+    t.error(err, 'no error')
+    setImmediate(function () {
+      t.equal(queue.length(), 0, 'no queued tasks')
+      t.equal(queue.running(), 0, 'no running tasks')
+      t.equal(queue.drain, predrain, 'drain is back to default')
+    })
+  }
+
+  function worker (arg, cb) {
+    t.equal(expected.shift(), arg, 'tasks come in order')
+    setImmediate(function () {
+      cb(null, true)
+    })
+  }
+})
+
+test('killAndDrain', function (t) {
+  t.plan(6)
+
+  var queue = buildQueue(worker, 1)
+  var expected = [1]
+
+  var predrain = queue.drain
+
+  queue.drain = function drain () {
+    t.pass('drain has been called')
+  }
+
+  queue.push(1, done)
+  queue.push(4, done)
+  queue.unshift(3, done)
+  queue.unshift(2, done)
+  queue.killAndDrain()
+
+  function done (err, result) {
+    t.error(err, 'no error')
+    setImmediate(function () {
+      t.equal(queue.length(), 0, 'no queued tasks')
+      t.equal(queue.running(), 0, 'no running tasks')
+      t.equal(queue.drain, predrain, 'drain is back to default')
+    })
+  }
+
+  function worker (arg, cb) {
+    t.equal(expected.shift(), arg, 'tasks come in order')
+    setImmediate(function () {
+      cb(null, true)
+    })
+  }
+})
+
+test('pause && idle', function (t) {
+  t.plan(11)
+
+  var queue = buildQueue(worker, 1)
+  var worked = false
+
+  t.notOk(queue.paused, 'it should not be paused')
+  t.ok(queue.idle(), 'should be idle')
+
+  queue.pause()
+
+  queue.push(42, function (err, result) {
+    t.error(err, 'no error')
+    t.equal(result, true, 'result matches')
+  })
+
+  t.notOk(worked, 'it should be paused')
+  t.ok(queue.paused, 'it should be paused')
+  t.notOk(queue.idle(), 'should not be idle')
+
+  queue.resume()
+
+  t.notOk(queue.paused, 'it should not be paused')
+  t.notOk(queue.idle(), 'it should not be idle')
+
+  function worker (arg, cb) {
+    t.equal(arg, 42)
+    worked = true
+    process.nextTick(cb.bind(null, null, true))
+    process.nextTick(function () {
+      t.ok(queue.idle(), 'is should be idle')
+    })
+  }
+})
+
+test('push without cb', function (t) {
+  t.plan(1)
+
+  var queue = buildQueue(worker, 1)
+
+  queue.push(42)
+
+  function worker (arg, cb) {
+    t.equal(arg, 42)
+    cb()
+  }
+})
+
+test('unshift without cb', function (t) {
+  t.plan(1)
+
+  var queue = buildQueue(worker, 1)
+
+  queue.unshift(42)
+
+  function worker (arg, cb) {
+    t.equal(arg, 42)
+    cb()
+  }
+})
+
+test('push with worker throwing error', function (t) {
+  t.plan(5)
+  var q = buildQueue(function (task, cb) {
+    cb(new Error('test error'), null)
+  }, 1)
+  q.error(function (err, task) {
+    t.ok(err instanceof Error, 'global error handler should catch the error')
+    t.match(err.message, /test error/, 'error message should be "test error"')
+    t.equal(task, 42, 'The task executed should be passed')
+  })
+  q.push(42, function (err) {
+    t.ok(err instanceof Error, 'push callback should catch the error')
+    t.match(err.message, /test error/, 'error message should be "test error"')
+  })
+})
+
+test('unshift with worker throwing error', function (t) {
+  t.plan(5)
+  var q = buildQueue(function (task, cb) {
+    cb(new Error('test error'), null)
+  }, 1)
+  q.error(function (err, task) {
+    t.ok(err instanceof Error, 'global error handler should catch the error')
+    t.match(err.message, /test error/, 'error message should be "test error"')
+    t.equal(task, 42, 'The task executed should be passed')
+  })
+  q.unshift(42, function (err) {
+    t.ok(err instanceof Error, 'unshift callback should catch the error')
+    t.match(err.message, /test error/, 'error message should be "test error"')
+  })
+})
+
+test('pause/resume should trigger drain event', function (t) {
+  t.plan(1)
+
+  var queue = buildQueue(worker, 1)
+  queue.pause()
+  queue.drain = function () {
+    t.pass('drain should be called')
+  }
+
+  function worker (arg, cb) {
+    cb(null, true)
+  }
+
+  queue.resume()
+})
+
+test('paused flag', function (t) {
+  t.plan(2)
+
+  var queue = buildQueue(function (arg, cb) {
+    cb(null)
+  }, 1)
+  t.equal(queue.paused, false)
+  queue.pause()
+  t.equal(queue.paused, true)
+})
+
+test('abort', function (t) {
+  t.plan(11)
+
+  var queue = buildQueue(worker, 1)
+  var abortedTasks = 0
+
+  var predrain = queue.drain
+
+  queue.drain = function drain () {
+    t.fail('drain should never be called')
+  }
+
+  // Pause queue to prevent tasks from starting
+  queue.pause()
+  queue.push(1, doneAborted)
+  queue.push(4, doneAborted)
+  queue.unshift(3, doneAborted)
+  queue.unshift(2, doneAborted)
+
+  // Abort all queued tasks
+  queue.abort()
+
+  // Verify state after abort
+  t.equal(queue.length(), 0, 'no queued tasks after abort')
+  t.equal(queue.drain, predrain, 'drain is back to default')
+
+  setImmediate(function () {
+    t.equal(abortedTasks, 4, 'all queued tasks were aborted')
+  })
+
+  function doneAborted (err) {
+    t.ok(err, 'error is present')
+    t.equal(err.message, 'abort', 'error message is abort')
+    abortedTasks++
+  }
+
+  function worker (arg, cb) {
+    t.fail('worker should not be called')
+    setImmediate(function () {
+      cb(null, true)
+    })
+  }
+})
+
+test('abort with error handler', function (t) {
+  t.plan(7)
+
+  var queue = buildQueue(worker, 1)
+  var errorHandlerCalled = 0
+
+  queue.error(function (err, task) {
+    t.equal(err.message, 'abort', 'error handler receives abort error')
+    t.ok(task !== null, 'error handler receives task value')
+    errorHandlerCalled++
+  })
+
+  // Pause queue to prevent tasks from starting
+  queue.pause()
+  queue.push(1, doneAborted)
+  queue.push(2, doneAborted)
+
+  // Abort all queued tasks
+  queue.abort()
+
+  setImmediate(function () {
+    t.equal(errorHandlerCalled, 2, 'error handler called for all aborted tasks')
+  })
+
+  function doneAborted (err) {
+    t.ok(err, 'callback receives error')
+  }
+
+  function worker (arg, cb) {
+    t.fail('worker should not be called')
+    setImmediate(function () {
+      cb(null, true)
+    })
+  }
+})

frontend/node_modules/fastq/test/tsconfig.json

@@ -0,0 +1,11 @@
+{
+  "compilerOptions": {
+    "target": "es6",
+    "module": "commonjs",
+    "noEmit": true,
+    "strict": true
+  },
+  "files": [
+    "./example.ts"
+  ]
+}