Gemini 4 Argon 编程测试

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实现 pool.ts，导出 async function pool<T>(tasks: Array<() => Promise<T>>, limit: number): Promise<PromiseSettledResult<T>[]>。任务惰性启动，同时最多运行 limit 个，结果保持输入顺序；promise 拒绝和同步抛错均转为 rejected 结果，不阻止其他任务。空输入返回 []；非正整数 limit 必须抛 RangeError，即使输入为空。无需依赖。只返回 pool.ts，不修改给定检查。

输入／起始文件

// Input: delays [30, 5, 15] ms; limit 2.
// Implementation file: pool.ts

测试前保存以下检查

// Save as pool.check.ts (Node 22+)
import assert from 'node:assert/strict';
import { pool } from './pool.ts';
let active = 0, peak = 0;
const tasks = [30, 5, 15].map((ms, i) => async () => {
 active++; peak = Math.max(peak, active);
 await new Promise(r => setTimeout(r, ms));
 active--; return i;
});
assert.deepEqual(await pool(tasks, 2), [0,1,2].map(value => ({status:'fulfilled', value})));
assert.equal(peak, 2);
const rejected = await pool([() => { throw new Error('sync'); }, () => Promise.reject('async'), async () => 7], 1);
assert.deepEqual(rejected.map(r => r.status), ['rejected','rejected','fulfilled']);
assert.deepEqual(rejected[2], {status:'fulfilled', value:7});
assert.deepEqual(await pool([], 2), []);
for (const limit of [0, -1, 1.5, NaN, Infinity]) {
 await assert.rejects(async () => pool([], limit), RangeError);
}
console.log('pool: all assertions passed');

本地执行命令

npx --yes --package tsx@4.21.0 tsx pool.check.ts

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修复下方 useSearch.ts，保留 API useSearch(query, search)，search(q) 返回 Promise<string[]>。只有最新 query 能更新状态；空白查询清空结果与错误；忽略过期成功和拒绝；当前拒绝时 error 设置为错误消息；卸载后阻止状态更新。search 引用稳定。返回包含 items 和 error 的对象，error 初始为 null。只返回 useSearch.ts，不修改检查。

输入／起始文件

// Save as useSearch.ts — intentionally broken starter
import { useEffect, useState } from 'react';
export function useSearch(query: string, search: (q: string) => Promise<string[]>) {
 const [items, setItems] = useState<string[]>([]);
 const [error, setError] = useState<string | null>(null);
 useEffect(() => { search(query).then(setItems).catch(e => setError(e.message)); }, [query, search]);
 return {items, error};
}

测试前保存以下检查

// Save as race.check.test.tsx in a fresh npm directory.
// @vitest-environment jsdom
import { afterEach, expect, test, vi } from 'vitest';
import { act, cleanup, renderHook } from '@testing-library/react';
import { useSearch } from './useSearch';
afterEach(cleanup);
const deferred = () => {
 let resolve!: (v:string[])=>void;
 let reject!: (e:Error)=>void;
 const promise = new Promise<string[]>((a,b)=>{resolve=a;reject=b});
 return {promise,resolve,reject};
};
test('latest request, blank query, rejection and unmount', async () => {
 const a=deferred(), b=deferred(), c=deferred(), d=deferred();
 const pending: Record<string, ReturnType<typeof deferred>> = {a,b,c,d};
 const search=vi.fn((q:string) => pending[q].promise);
 const {result, rerender, unmount}=renderHook(({q})=>useSearch(q,search), {initialProps:{q:'a'}});
 rerender({q:'b'});
 await act(async()=>b.resolve(['B']));
 await act(async()=>a.resolve(['A']));
 expect(result.current.items).toEqual(['B']);
 rerender({q:'c'}); rerender({q:'  '});
 await act(async()=>c.reject(new Error('stale')));
 expect(result.current).toEqual({items:[],error:null});
 expect(search).toHaveBeenCalledTimes(3);
 rerender({q:'d'});
 await act(async()=>d.reject(new Error('offline')));
 expect(result.current.error).toBe('offline');
 const e=deferred();
 const next=()=>e.promise;
 const h=renderHook(()=>useSearch('e',next));
 h.unmount(); await act(async()=>e.resolve(['late']));
 unmount();
});

本地执行命令

npm init -y
npm install --save-exact react@19.2.1 react-dom@19.2.1
npm install --save-dev --save-exact vitest@3.2.4 jsdom@26.1.0 @testing-library/react@16.3.0
npx vitest run race.check.test.tsx

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编写 Python 3.11+ 的 summarize.py，仅用标准库。从 stdin 读取 UTF-8 CSV：name,amount,currency。用 Decimal 按币种求和，去掉字段两端空格，币种转大写，只接受 USD/EUR。缺失或空白字段、不支持的币种、非法或非有限金额、小数超过两位的行跳过。支持姓名中的引号逗号。输出 JSON：totals（币种到金额的对象）和 skipped（整数），币种键排序、金额为两位小数字符串；空 CSV 输出空 totals 和 skipped 0。禁止 float。只返回 summarize.py。

输入／起始文件

name,amount,currency
"Doe, Jane",0.10,usd
Bob,0.20,USD
Eve,-1.00,EUR
X,NaN,USD
Y,2.345,USD
Z,10,GBP
Missing,,USD

测试前保存以下检查

# Save as csv_check.py next to summarize.py
import json, subprocess, sys
sample = 'name,amount,currency\n"Doe, Jane",0.10,usd\nBob,0.20,USD\nEve,-1.00,EUR\nX,NaN,USD\nY,2.345,USD\nZ,10,GBP\nMissing,,USD\n'
def run(data):
 p = subprocess.run([sys.executable, 'summarize.py'], input=data, text=True, capture_output=True, timeout=5, check=True)
 return json.loads(p.stdout)
assert run(sample) == {'totals': {'EUR':'-1.00', 'USD':'0.30'}, 'skipped':4}
assert run('name,amount,currency\n') == {'totals':{}, 'skipped':0}
assert run('name,amount,currency\nA,Infinity,USD\n') == {'totals':{}, 'skipped':1}
print('csv: all assertions passed')

本地执行命令

python csv_check.py

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重构下方三个 TypeScript 文件：内部 User 的 displayName 改为 firstName 和 lastName。在 user.ts 导出 getDisplayName(user): string，分别 trim 后以单空格拼接非空部分。更新 renderUser 与 toPublicUser，保持函数名、返回类型及包含 id 和 name 字段的公开对象。移除内部 displayName 引用。禁止 any、类型断言和新依赖。返回三个完整文件，不修改检查。

输入／起始文件

// user.ts
export type User = {id: string; displayName: string};
// view.ts
import type { User } from './user';
export const renderUser = (user: User): string => user.displayName;
// api.ts
import type { User } from './user';
export const toPublicUser = (user: User): {id: string; name: string} => ({id: user.id, name: user.displayName});

测试前保存以下检查

// Save as refactor.check.ts
import assert from 'node:assert/strict';
import { getDisplayName, type User } from './user';
import { renderUser } from './view';
import { toPublicUser } from './api';
const u: User = {id:'u1', firstName:' Ada ', lastName:' Lovelace '};
assert.equal(getDisplayName(u), 'Ada Lovelace');
assert.equal(renderUser(u), 'Ada Lovelace');
assert.deepEqual(toPublicUser(u), {id:'u1', name:'Ada Lovelace'});
assert.equal(getDisplayName({...u, firstName:' ', lastName:' Ng '}), 'Ng');
assert.equal(getDisplayName({...u, firstName:'', lastName:''}), '');
console.log('refactor: all assertions passed');

本地执行命令

npx --yes --package typescript@5.9.3 tsc --noEmit --strict --target ES2022 --module ESNext --moduleResolution bundler user.ts view.ts api.ts
npx --yes --package tsx@4.21.0 tsx refactor.check.ts