试用前准备：全班模拟压测、评分并发 6→16、手动备份与恢复

- test/classroom.ts：45 个虚拟学生走一遍登录、运行、自测、提交，统计每个环节等多久
- 评分并发可配置（SIM_GRADE_CONCURRENCY，默认 16），提交队列同时评的份数跟着走；
  2 核实测项目 8 任务 3 全班自测从约 4 分钟降到约 1.5 分钟
- 检查的默认等待 2 秒→5 秒，机器忙时不再误判正确的程序
- 删除学生时删除他的数据库（编号会重新用给新学生）
- deploy/backup.sh、deploy/restore.sh：手动备份到宿主机 backups/，恢复前先备份

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

server/src/app.ts

@@ -24,7 +24,7 @@ import { languageService } from './language-service'
 import { getReview, gradebook, manualScore, saveReview, studentDetail, submissionFiles } from './reviews'
 import type { GradingQueue } from './grading/queue'
 import { config } from './config'
-import { restoreExperimentDatabases, userDatabaseDir } from './databases'
+import { deleteUserDatabases, restoreExperimentDatabases, userDatabaseDir } from './databases'
 import { listSamples, loadChecks, loadSample } from './samples'
 import { SqlError, sqlService } from './sql-service'
 import { serveStatic } from './static'
@@ -280,8 +280,8 @@ export function createApp(db: Database, gradingQueue: GradingQueue, aiQueue: AiQ
     return password ? c.json({ password }) : c.json({ message: '学生不存在' }, 404)
   })
 
-  app.delete('/api/teacher/students/:id', (c) => {
-    deleteStudent(db, id(c))
+  app.delete('/api/teacher/students/:id', async (c) => {
+    if (deleteStudent(db, id(c))) await deleteUserDatabases(id(c))
     return c.json({})
   })
 

server/src/backup.ts

@@ -0,0 +1,38 @@
+// 手动备份：平台数据库（账号、班级、作品、作业、提交、评阅）和每个学生的数据库，导出到一个目录，
+// 目录结构和 data/ 一样。服务器上用 deploy/backup.sh 备份、deploy/restore.sh 恢复（见 deploy/README.md）。
+import { Database } from 'bun:sqlite'
+import { mkdir, readdir, rename, rm } from 'node:fs/promises'
+import { join } from 'node:path'
+import { config } from './config'
+
+/**
+ * 把一个 SQLite 数据库完整导出成文件。serialize 在读事务里读出所有页，
+ * 学生程序或平台正在写入时也能得到一份一致的数据库（直接拷文件可能拷到写了一半的状态）
+ */
+async function saveCopy(path: string, target: string) {
+  const source = new Database(path, { readonly: true })
+  try {
+    await Bun.write(target, source.serialize())
+  } finally {
+    source.close()
+  }
+}
+
+/** 把 data/ 里的数据库导出到 target（已有备份时报错，不覆盖） */
+export async function backupTo(target: string) {
+  if (await Bun.file(join(target, 'iot-sim.db')).exists()) throw new Error(`${target} 里已经有备份`)
+  // 先写到临时目录，写完再改名，不会留下做了一半的备份
+  const temp = `${target}.partial`
+  await rm(temp, { recursive: true, force: true })
+  await mkdir(temp, { recursive: true })
+
+  await saveCopy(join(config.dataDir, 'iot-sim.db'), join(temp, 'iot-sim.db'))
+  const databases = join(config.dataDir, 'databases')
+  for (const user of await readdir(databases).catch(() => [] as string[])) {
+    const files = (await readdir(join(databases, user)).catch(() => [] as string[])).filter((f) => f.endsWith('.db'))
+    if (files.length > 0) await mkdir(join(temp, 'databases', user), { recursive: true })
+    for (const file of files) await saveCopy(join(databases, user, file), join(temp, 'databases', user, file))
+  }
+  await rm(target, { recursive: true, force: true })
+  await rename(temp, target)
+}

server/src/classes.ts

@@ -136,6 +136,7 @@ export function resetPassword(db: Database, studentId: number): string | null {
 }
 
 /** 删除学生，连同他的作品 */
+/** 删除学生，返回是否删掉了 */
 export function deleteStudent(db: Database, studentId: number) {
-  db.query(`DELETE FROM users WHERE id = ? AND role = 'student'`).run(studentId)
+  return db.query(`DELETE FROM users WHERE id = ? AND role = 'student'`).run(studentId).changes > 0
 }

server/src/config.ts

@@ -26,6 +26,12 @@ export const config = {
   cpuLimitSeconds: Number(env.SIM_CPU_LIMIT_SECONDS ?? 120),
   /** 全站同时运行的学生程序最多多少个（两个班约 100 人） */
   maxRuns: Number(env.SIM_MAX_RUNS ?? 150),
+  /**
+   * 全站同时跑多少个评分检查项（提交评分和自测共用）。检查大部分时间在等学生程序的定时器，并发太低时全班排队：
+   * 2 核实测 45 人同时自测项目 8 任务 3，6 个时最后一人等 4 分钟（CPU 才 28%），16 个时 1.5 分钟（CPU 58%）；
+   * 24 个时 CPU 接近 80%，定时器来不及触发，参考答案被误判不通过（test/classroom.ts）
+   */
+  gradeConcurrency: Number(env.SIM_GRADE_CONCURRENCY ?? 16),
   /** 一次运行最长多少分钟，到时自动结束 */
   maxRunMinutes: Number(env.SIM_MAX_RUN_MINUTES ?? 60),
   /** SQLite 数据库所在目录（账号、班级、学生作品）；部署时放在数据卷里 */

server/src/databases.ts

@@ -13,6 +13,14 @@ export async function userDatabaseDir(userId: number) {
   return dir
 }
 
+/**
+ * 删除用户的全部数据库（删除学生时）。用户编号在删掉最大的编号后会被下一个新用户重新使用，
+ * 不删的话新学生会看到前一个人的库
+ */
+export async function deleteUserDatabases(userId: number) {
+  await rm(resolve(config.dataDir, 'databases', String(userId)), { recursive: true, force: true })
+}
+
 /** 实验预置的数据库脚本（samples/<实验>/database.sql），没有时返回 undefined */
 export async function experimentScript(sampleId: string): Promise<string | undefined> {
   const file = Bun.file(join(config.samplesDir, sampleId, 'database.sql'))

server/src/grading/checks.ts

@@ -22,7 +22,8 @@ export type Step =
   | { kind: 'board'; analog: Partial<Record<AnalogKey, number>>; digital: Partial<Record<DigitalKey, boolean>> }
   | { kind: 'wait'; ms: number }
   /** desc：给学生看的期望说明，如"显示当前时间"，不写就按期望自动生成 */
-  | { kind: 'expect'; expect: Expectation; within: number; desc?: string }
+  /** timed：规则里写了 within（不通过时说明"几秒内"） */
+  | { kind: 'expect'; expect: Expectation; within: number; timed: boolean; desc?: string }
 
 export type Expectation =
   /** 控件属性等于某个值：text → Text，ledText → LedText（LED 控件），enabled → Enabled，checked → Checked，visible → Visible（连同所在的容器都可见），on → IsOn（灯泡、报警灯），value → Value（滑动条） */
@@ -54,8 +55,11 @@ export type Expectation =
   | { kind: 'row'; control: string; cells: Record<string, string>; present: boolean }
   | { kind: 'console'; text: string }
 
-/** 期望默认最多等多久（毫秒）；依赖定时器的检查在规则里写 within */
-const DEFAULT_WITHIN = 2000
+/**
+ * 期望默认最多等多久（毫秒）；依赖定时器的检查在规则里写 within。条件一满足就往下走，放宽只让不通过的检查多等一会儿；
+ * 全班同时评分时机器忙，点按钮后查数据库、画图表可能超过 2 秒（test/classroom.ts 实测），所以不能太紧
+ */
+const DEFAULT_WITHIN = 5000
 
 const PROP_KEYS: Record<string, string> = { text: 'Text', ledText: 'LedText', enabled: 'Enabled', checked: 'Checked', visible: 'Visible', on: 'IsOn', value: 'Value' }
 const STRING_PROPS = new Set(['Text', 'LedText'])
@@ -158,6 +162,7 @@ function parseStep(raw: unknown, where: string): Step {
       kind: 'expect',
       expect: parseExpectation(expectation, where),
       within: within === undefined ? DEFAULT_WITHIN : duration(within, where),
+      timed: within !== undefined,
       ...(desc === undefined ? {} : { desc: String(desc) }),
     }
   }

server/src/grading/grader.ts

@@ -1,5 +1,5 @@
 // 自动评分：编译一次学生工程，每个检查项各启动一次程序，按步骤操作并核对结果。
-// 检查大部分时间在等定时器，CPU 主要花在编译和启动程序上；2 核的服务器全站同时跑 GRADE_CONCURRENCY 个检查，其余排队。
+// 检查大部分时间在等定时器，CPU 主要花在编译和启动程序上；全站同时跑 config.gradeConcurrency 个检查，其余排队。
 import type { CheckResult, ControlNode, GradeResult } from '@iot/shared'
 import { rm } from 'node:fs/promises'
 import { dirname } from 'node:path'
@@ -9,7 +9,6 @@ import { gradingDatabaseDir } from '../databases'
 import type { Check, Expectation, Step } from './checks'
 import { ProgramDriver } from './driver'
 
-const GRADE_CONCURRENCY = 6
 /** 点数据表格的单元格前，最多等多久让那一行出现（程序可能还在查询数据库、刷新表格） */
 const GRID_WAIT = 5000
 /** 操作控件前最多等多久让它出现 */
@@ -28,7 +27,7 @@ let running = 0
 const waiting: (() => void)[] = []
 
 async function withSlot<T>(task: () => Promise<T>): Promise<T> {
-  if (running >= GRADE_CONCURRENCY) await new Promise<void>((resolve) => waiting.push(resolve))
+  if (running >= config.gradeConcurrency) await new Promise<void>((resolve) => waiting.push(resolve))
   running++
   try {
     return await task()
@@ -211,7 +210,7 @@ const quote = (value: unknown) => (value === undefined || value === null || valu
 
 async function expectStep(driver: ProgramDriver, step: Extract<Step, { kind: 'expect' }>) {
   const { expect: e, within } = step
-  const wait = within > 2000 ? `${seconds(within)}内` : ''
+  const wait = step.timed ? `${seconds(within)}内` : ''
 
   if (e.kind === 'unchanged') {
     const node = need(driver, e.control)

server/src/grading/queue.ts

@@ -1,4 +1,4 @@
-// 评分队列：学生提交后立即返回，后台按提交顺序评分（同时最多评 MAX_ACTIVE 份），结果写回数据库。
+// 评分队列：学生提交后立即返回，后台按提交顺序评分（同时评的份数不超过检查项的并发上限，保证评分槽位能用满），结果写回数据库。
 // 服务器重启前没评完的提交，启动时继续评。评完调用 onGraded（接着做 AI 评阅）。
 import type { Database } from 'bun:sqlite'
 import type { SourceFile } from '@iot/shared'
@@ -9,7 +9,6 @@ import { config } from '../config'
 import { safeJoin } from '../run-session'
 import { grade } from './grader'
 
-const MAX_ACTIVE = 3
 
 /** 把作品写进一个干净的工程目录（评分和自测用） */
 export async function writeProject(dir: string, files: SourceFile[]) {
@@ -44,7 +43,7 @@ export function createGradingQueue(db: Database, onGraded: (submissionId: number
   }
 
   function pump() {
-    while (active < MAX_ACTIVE && queue.length > 0) {
+    while (active < config.gradeConcurrency && queue.length > 0) {
       const id = queue.shift()!
       active++
       void gradeOne(id).finally(() => {

server/src/grading/selfcheck.ts

@@ -1,6 +1,6 @@
 // 自测：学生提交前自己跑一遍评分，告诉他哪几项不通过、为什么；不计分、不留记录。
 // 每人同时只能有一次，结果放在内存里，保留到下一次自测（服务器重启后就没有了）。
-// 检查项和提交评分一样受全站并发上限（grader.ts 的 GRADE_CONCURRENCY）约束，机器忙时排队。
+// 检查项和提交评分一样受全站并发上限（config.gradeConcurrency）约束，机器忙时排队。
 import type { SelfCheck, SourceFile } from '@iot/shared'
 import { rm } from 'node:fs/promises'
 import { join } from 'node:path'

server/src/index.ts

@@ -1,6 +1,7 @@
 import type { ClientMessage, ServerMessage } from '@iot/shared'
 import { createAiQueue } from './ai-review'
 import { createApp } from './app'
+import { backupTo } from './backup'
 import { ensureTeacher, tokenUser } from './auth'
 import { compileService } from './compile-service'
 import { languageService } from './language-service'
@@ -13,6 +14,15 @@ import { cleanupStaleRuns, RunSession } from './run-session'
 import { sqlService } from './sql-service'
 import { checkSandbox, sandboxError } from './sandbox'
 
+// 手动备份：bun server.js backup <目录>（deploy/backup.sh 调用），导出数据库后退出，不启动服务器
+if (process.argv[2] === 'backup') {
+  const target = process.argv[3]
+  if (!target) throw new Error('用法：backup <目录>')
+  await backupTo(target)
+  console.log(`已备份到 ${target}`)
+  process.exit(0)
+}
+
 await cleanupStaleRuns()
 await checkSandbox()
 if (sandboxError) console.error(sandboxError)

server/test/api.test.ts

@@ -499,6 +499,22 @@ describe('数据库页面', () => {
     expect((await new Browser().get('/api/db')).status).toBe(401)
   }, 60000)
 
+  test('删除学生时删除他的库：编号重新用给新学生时看不到前一个人的库', async () => {
+    const t = await teacher()
+    const classId = await classWithStudents(t, [{ username: 's1', name: '甲', password: 'p1' }])
+    const s1 = new Browser()
+    await s1.login('s1', 'p1')
+    await s1.post('/api/db/query', { database: 'master', sql: 'CREATE DATABASE 甲的库' })
+    const [{ id }] = (await t.get(`/api/teacher/classes/${classId}/students`)).body
+    await t.delete(`/api/teacher/students/${id}`)
+
+    await t.post(`/api/teacher/classes/${classId}/import`, { rows: [{ username: 's2', name: '乙', password: 'p2' }] })
+    expect((await t.get(`/api/teacher/classes/${classId}/students`)).body[0].id).toBe(id)
+    const s2 = new Browser()
+    await s2.login('s2', 'p2')
+    expect((await s2.get('/api/db')).body.databases).toEqual([])
+  }, 60000)
+
   test('恢复实验初始数据：只替换实验用到的库', async () => {
     const t = await teacher()
     await t.post('/api/db/query', { database: 'master', sql: 'CREATE DATABASE 我的库' })

server/test/backup.test.ts

@@ -0,0 +1,46 @@
+// 手动备份：平台数据库和学生数据库都导出完整（正在使用、数据还在 -wal 文件里时也一样）。
+import { afterAll, beforeAll, expect, test } from 'bun:test'
+import { Database } from 'bun:sqlite'
+import { mkdir, rm } from 'node:fs/promises'
+import { join } from 'node:path'
+import { backupTo } from '../src/backup'
+import { config } from '../src/config'
+import { openDatabase } from '../src/db'
+
+const saved = config.dataDir
+const target = `${config.runsDir}/test-backup-copy`
+
+beforeAll(async () => {
+  config.dataDir = `${config.runsDir}/test-backup-data`
+  await rm(config.dataDir, { recursive: true, force: true })
+  await rm(target, { recursive: true, force: true })
+})
+
+afterAll(async () => {
+  await rm(config.dataDir, { recursive: true, force: true })
+  await rm(target, { recursive: true, force: true })
+  config.dataDir = saved
+})
+
+test('导出平台数据库和每个学生的数据库，不覆盖已有的备份', async () => {
+  // 平台和学生程序都开着库（WAL 模式，刚写入的数据还在 -wal 文件里）
+  const db = openDatabase()
+  db.query(`INSERT INTO users (username, name, password, role, created_at) VALUES ('s1', '学生', '123456', 'student', 0)`).run()
+  await mkdir(join(config.dataDir, 'databases', '7'), { recursive: true })
+  const student = new Database(join(config.dataDir, 'databases', '7', 'WisdomCampus.db'), { create: true })
+  student.run('PRAGMA journal_mode = WAL')
+  student.run('CREATE TABLE EnvironmentData (id INTEGER PRIMARY KEY, temperature REAL) STRICT')
+  student.run('INSERT INTO EnvironmentData (temperature) VALUES (25.5), (26)')
+
+  await backupTo(target)
+  await expect(backupTo(target)).rejects.toThrow('已经有备份')
+  student.close()
+  db.close()
+
+  const mainCopy = new Database(join(target, 'iot-sim.db'), { readonly: true })
+  expect(mainCopy.query(`SELECT name FROM users WHERE username = 's1'`).get()).toEqual({ name: '学生' })
+  mainCopy.close()
+  const studentCopy = new Database(join(target, 'databases', '7', 'WisdomCampus.db'), { readonly: true })
+  expect(studentCopy.query('SELECT temperature FROM EnvironmentData ORDER BY id').all()).toEqual([{ temperature: 25.5 }, { temperature: 26 }])
+  studentCopy.close()
+})

server/test/classroom.ts

@@ -0,0 +1,254 @@
+// 全班模拟：N 个虚拟学生像在课堂上一样使用平台，按环节统计每个学生等了多久。
+// 和 load.ts 不同，它从外面通过 HTTP / WebSocket 访问一台正在运行的服务器，经过登录、语言服务、编译、评分队列的全过程。
+//
+// 环节（每个环节等全班做完再进入下一个，学生在 SPREAD 秒内陆续开始，像老师说"开始"之后的样子）：
+//   登录 → 打开作业并保存 → 边写边检查 → 运行（到窗体出现）→ 点按钮到实训台响应 → 自己检查 → 提交并等自动评分
+//
+// 用法：bun test/classroom.ts [人数，默认 45]
+//   环境变量：BASE（默认 http://localhost:3000）、TEACHER_USERNAME / TEACHER_PASSWORD（默认 admin / admin）、
+//            SPREAD（秒，默认 10）、KEEP=1（结束后保留压测班级和账号）、
+//            SAMPLE（实验，默认项目 3 任务 2；"点按钮"环节只对默认实验做）、CPUS（和服务器在同一台机器时填服务器用的核，如 0,1，每个环节显示这几个核的平均占用）
+// 会建一个"压测班"和 N 个 loadtest 开头的学生账号，结束时删除。按服务器配置测试：taskset -c 0,1 bun src/index.ts
+import type { ControlNode, ServerMessage, SourceFile } from '@iot/shared'
+
+const COUNT = Number(process.argv[2] ?? 45)
+const BASE = process.env.BASE ?? 'http://localhost:3000'
+const SPREAD_MS = Number(process.env.SPREAD ?? 10) * 1000
+const SAMPLE = process.env.SAMPLE ?? 'p3-t2-人体红外ZigBee联动'
+const PASSWORD = 'loadtest-123'
+const CPUS = process.env.CPUS?.split(',').map(Number) ?? []
+
+/** /proc/stat 里这几个核的忙碌时间和总时间 */
+async function cpuTimes() {
+  const stat = await Bun.file('/proc/stat').text()
+  let busy = 0
+  let total = 0
+  for (const cpu of CPUS) {
+    const fields = new RegExp(`^cpu${cpu} (.*)$`, 'm').exec(stat)![1].trim().split(/\s+/).map(Number)
+    const idle = fields[3] + fields[4]
+    const sum = fields.reduce((a, b) => a + b, 0)
+    busy += sum - idle
+    total += sum
+  }
+  return { busy, total }
+}
+
+class Client {
+  token = ''
+
+  async request(method: string, path: string, json?: unknown) {
+    const headers: Record<string, string> = {}
+    if (this.token) headers.authorization = `Bearer ${this.token}`
+    if (json !== undefined) headers['content-type'] = 'application/json'
+    const response = await fetch(`${BASE}${path}`, { method, headers, body: json === undefined ? undefined : JSON.stringify(json) })
+    const body = (await response.json().catch(() => null)) as any
+    if (!response.ok) throw new Error(`${method} ${path}：${response.status} ${body?.message ?? ''}`)
+    return body
+  }
+
+  async login(username: string, password: string) {
+    this.token = (await this.request('POST', '/api/login', { username, password })).accessToken
+  }
+}
+
+function findId(node: ControlNode, name: string): string | undefined {
+  if (node.name === name) return node.id
+  for (const child of node.children) {
+    const id = findId(child, name)
+    if (id) return id
+  }
+}
+
+/** 一个学生的运行窗口：WebSocket 连接 + 收到的消息 */
+class RunWindow {
+  private readonly ws: WebSocket
+  private listeners: ((m: ServerMessage) => void)[] = []
+  form?: ControlNode
+  compileMs?: number
+
+  constructor(token: string) {
+    this.ws = new WebSocket(`${BASE.replace(/^http/, 'ws')}/ws?token=${encodeURIComponent(token)}`)
+    this.ws.onmessage = (event) => {
+      const message = JSON.parse(String(event.data)) as ServerMessage
+      if (message.type === 'compiled') this.compileMs = message.ms
+      for (const listener of this.listeners) listener(message)
+    }
+  }
+
+  opened() {
+    return new Promise<void>((resolve, reject) => {
+      this.ws.onopen = () => resolve()
+      this.ws.onerror = () => reject(new Error('WebSocket 连接失败'))
+    })
+  }
+
+  send(message: object) {
+    this.ws.send(JSON.stringify(message))
+  }
+
+  /** 等到某条消息出现；出错消息直接失败 */
+  waitFor(match: (m: ServerMessage) => boolean, timeoutMs = 60_000) {
+    return new Promise<ServerMessage>((resolve, reject) => {
+      const timer = setTimeout(() => done(new Error('超时')), timeoutMs)
+      const listener = (m: ServerMessage) => {
+        if (m.type === 'serverError' || m.type === 'exception') done(new Error(m.message))
+        else if (m.type === 'compiled' && !m.ok) done(new Error('编译失败'))
+        else if (match(m)) done(null, m)
+      }
+      const done = (error: Error | null, m?: ServerMessage) => {
+        clearTimeout(timer)
+        this.listeners = this.listeners.filter((l) => l !== listener)
+        if (error) reject(error)
+        else resolve(m!)
+      }
+      this.listeners.push(listener)
+    })
+  }
+
+  action(name: string, action: object) {
+    this.send({ type: 'action', id: findId(this.form!, name)!, ...action })
+  }
+
+  close() {
+    this.ws.close()
+  }
+}
+
+interface Student {
+  username: string
+  client: Client
+  files: SourceFile[]
+  window?: RunWindow
+}
+
+const elapsed = async (work: () => Promise<unknown>) => {
+  const start = performance.now()
+  await work()
+  return performance.now() - start
+}
+
+/** 一个环节：每个学生在 SPREAD 内随机时刻开始，统计用时和失败 */
+async function phase(name: string, students: Student[], work: (s: Student) => Promise<unknown>, spreadMs = SPREAD_MS) {
+  const times: number[] = []
+  const errors = new Map<string, number>()
+  const start = performance.now()
+  const cpuStart = CPUS.length ? await cpuTimes() : null
+  await Promise.all(
+    students.map(async (student) => {
+      await Bun.sleep(Math.random() * spreadMs)
+      try {
+        times.push(await elapsed(() => work(student)))
+      } catch (error) {
+        const message = error instanceof Error ? error.message : String(error)
+        errors.set(message, (errors.get(message) ?? 0) + 1)
+      }
+    }),
+  )
+  times.sort((a, b) => a - b)
+  const cpuEnd = cpuStart && (await cpuTimes())
+  const cpu = cpuStart && cpuEnd ? `  CPU ${Math.round(((cpuEnd.busy - cpuStart.busy) / (cpuEnd.total - cpuStart.total)) * 100)}%` : ''
+  const pct = (p: number) => (times.length ? `${(times[Math.min(times.length - 1, Math.floor((times.length * p) / 100))] / 1000).toFixed(1)}s` : '-')
+  console.log(
+    `${name.padEnd(12, '　')} 成功 ${String(times.length).padStart(3)}/${students.length}  中位数 ${pct(50).padStart(6)}  P95 ${pct(95).padStart(6)}  最长 ${pct(100).padStart(6)}  整个环节 ${((performance.now() - start) / 1000).toFixed(1)}s${cpu}`,
+  )
+  for (const [message, count] of errors) console.log(`    失败 ${count} 次：${message}`)
+}
+
+/** 每秒查一次，直到 done 返回 true */
+async function poll(read: () => Promise<boolean>, timeoutMs = 600_000) {
+  const deadline = Date.now() + timeoutMs
+  while (!(await read())) {
+    if (Date.now() > deadline) throw new Error('超时')
+    await Bun.sleep(1000)
+  }
+}
+
+// ---- 准备：老师建班、导入学生、布置作业 ----
+const teacher = new Client()
+await teacher.login(process.env.TEACHER_USERNAME ?? 'admin', process.env.TEACHER_PASSWORD ?? 'admin')
+const usernames = Array.from({ length: COUNT }, (_, i) => `loadtest${String(i + 1).padStart(3, '0')}`)
+const { id: classId } = await teacher.request('POST', '/api/teacher/classes', { name: `压测班 ${new Date().toLocaleString('zh-CN')}` })
+await teacher.request('POST', `/api/teacher/classes/${classId}/import`, {
+  rows: usernames.map((username, i) => ({ username, name: `压测${i + 1}`, password: PASSWORD })),
+})
+const checks: string[] = await teacher.request('GET', `/api/samples/${encodeURIComponent(SAMPLE)}/checks`)
+const template: SourceFile[] = await teacher.request('GET', `/api/samples/${encodeURIComponent(SAMPLE)}`)
+const assignment = await teacher.request('POST', '/api/teacher/assignments', {
+  classId,
+  sampleId: SAMPLE,
+  title: '压测',
+  startMode: 'ui',
+  template,
+  scoring: { auto: checks.map(() => 10), manual: [] },
+  deadline: null,
+})
+console.log(`${COUNT} 个学生，实验 ${SAMPLE}，服务器 ${BASE}，每个环节 ${SPREAD_MS / 1000} 秒内陆续开始\n`)
+
+const students: Student[] = usernames.map((username) => ({ username, client: new Client(), files: [] }))
+
+try {
+  await phase('登录', students, (s) => s.client.login(s.username, PASSWORD))
+
+  await phase('打开作业', students, async (s) => {
+    const { template } = await s.client.request('GET', `/api/assignments/${assignment.id}`)
+    s.files = template
+    await s.client.request('PUT', `/api/works/${encodeURIComponent(`assignment:${assignment.id}`)}`, { files: s.files })
+  })
+
+  await phase('边写边检查', students, (s) =>
+    s.client.request('POST', '/api/language', { type: 'diagnostics', session: 'tab', files: s.files }),
+  )
+
+  // 老师说"运行看看"：全班 SPREAD 内先后按 F5
+  await phase('运行到窗体出现', students, async (s) => {
+    const window = new RunWindow(s.client.token)
+    s.window = window
+    await window.opened()
+    const shown = window.waitFor((m) => m.type === 'formShown')
+    window.send({ type: 'run', files: s.files, sampleId: SAMPLE })
+    window.form = ((await shown) as Extract<ServerMessage, { type: 'formShown' }>).form
+  })
+
+  if (!process.env.SAMPLE) await phase('点按钮到实训台', students.filter((s) => s.window?.form), async (s) => {
+    const window = s.window!
+    window.action('com_lamp', { action: 'dropDown' })
+    window.action('com_lamp', { action: 'select', index: 3 })
+    window.action('btn_open', { action: 'click' })
+    await Bun.sleep(300)
+    // 设备消息由服务器记进实训台状态，再以 board 消息推给浏览器
+    const lit = window.waitFor((m) => m.type === 'board' && m.state.zigbee[1] === true, 30_000)
+    window.action('btn_lampOpen', { action: 'click' })
+    await lit
+  })
+
+  // 程序都还开着，再自己检查一遍（评分进程和正在运行的程序抢 CPU）
+  await phase('自己检查', students, async (s) => {
+    await s.client.request('POST', `/api/assignments/${assignment.id}/selfcheck`, { files: s.files })
+    let state: any
+    await poll(async () => (state = await s.client.request('GET', '/api/selfcheck'))?.status !== 'running')
+    // 参考答案应该全部通过；机器太忙时定时器检查可能超时误判
+    const failed = state.result?.results.filter((r: any) => !r.passed) ?? []
+    if (state.status !== 'done' || failed.length > 0) throw new Error(`自测没通过：${failed.map((r: any) => r.message).join('；') || state.status}`)
+  })
+
+  for (const s of students) s.window?.close()
+
+  await phase('提交到评完', students, async (s) => {
+    await s.client.request('POST', `/api/assignments/${assignment.id}/submit`, { files: s.files })
+    await poll(async () => {
+      const latest = await s.client.request('GET', `/api/assignments/${assignment.id}/submission`)
+      if (latest.status === 'error') throw new Error('评分出错')
+      if (latest.status === 'done' && latest.autoScore !== checks.length * 10) throw new Error(`参考答案只得了 ${latest.autoScore} 分`)
+      return latest.status === 'done'
+    })
+  })
+} finally {
+  for (const s of students) s.window?.close()
+  if (!process.env.KEEP) {
+    await teacher.request('DELETE', `/api/teacher/assignments/${assignment.id}`)
+    for (const student of await teacher.request('GET', `/api/teacher/classes/${classId}/students`)) {
+      await teacher.request('DELETE', `/api/teacher/students/${student.id}`)
+    }
+    await teacher.request('DELETE', `/api/teacher/classes/${classId}`)
+  }
+}

server/test/grading.test.ts

@@ -89,7 +89,7 @@ describe('改坏的代码', () => {
     const dir = await prepare(id, 'camera', { file: 'Form1.cs', from: 'DeviceCtrlHelper.ipCameraHelper.ImageRead += ipCameraHelper_ImageRead;', to: '' })
     const result = await grade(dir, await checksOf(id), id)
     expect(result.results.map((r) => r.passed)).toEqual([true, false, true, false])
-    expect(result.results[1].message).toBe('期望3 秒内 pictureBox1 显示摄像机拍到的图像，实际没有图片')
+    expect(result.results[1].message).toBe('期望 pictureBox1 显示摄像机拍到的图像，实际没有图片')
   }, 60000)
 
   test('数据库：照书上 INSERT 不写列名，温度和光照存反了', async () => {