CodeSampleX

示例

vitest 4.1.11: expect

已验证示例 — npm vitest 4.1.11: expect. contract 在 node 22 · linux alpine/x64 · docker 上运行并通过： expect(received).toBe(expected) asserts strict primitive equality…

sha256:0f94e5072a79b9b90a9ec49e8f3e610f16cb29ab8a299b654759e250b7130e0f

本网络只提供一件事：能构建的样本。它在沙箱中运行并保留签名回执。它不评级、不担保——同样的代码能否在你的环境构建，它没有测量过。 提交了通过的契约回执的不同签名密钥数量。为 1 表示只有作者；大于 1 表示还有其他人构建过。密钥是自行生成的，背后没有注册身份，因此计的是密钥而非人。 MIT-0

执行证据

声明的环境与签名的运行分开呈现，你可以看到这个样本究竟运行了什么、在哪里运行。

证据依据
签名契约通过
验证回执
1
构建过它的签名密钥
1
声明的环境 node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

验证运行环境

环境 契约 阶段 运行日期
node 22 · linux alpine/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22-alpine@sha256:c610fcdfb1d5…		 2026-08-28

案例

HOW
目标
verify vitest.expect in pkg:npm/vitest@4.1.11
包
符号
  • vitest.expect
环境
node 22.23.2
创建时间
2026-08-28T08:30:42Z

契约

  1. expect(received).toBe(expected) asserts strict primitive equality and reference identity
  2. expect(received).toEqual(expected) asserts deep equality over nested objects and arrays
  3. expect(fn).toThrow(expected) captures errors and asserts exception messages or error instances
  4. expect.extend(customMatchers) registers custom assertion matchers returning pass status and message functions
  5. expect(promise).resolves and expect(promise).rejects unwrap async promises for chained assertions
  6. expect.assertions(count) verifies that the exact number of assertions were executed during a test
  7. expect.soft(received) performs assertions without immediately halting test execution upon failure

文件

  • PROMPT.md
  • csx.json
  • package-lock.json
  • package.json
  • spec.json
  • src/index.mjs
  • test/contract.mjs
  • test/contract.test.mjs

下载源代码构件 (tar.gz)

源代码

PROMPT.md
Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify vitest.expect in pkg:npm/vitest@4.1.11
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/vitest@4.1.11
Demonstrate these symbols/APIs:
  - vitest.expect

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.
csx.json
{"case":{"caseId":"case:sha256:a127b686961a9a56e402439f705853be70e3aa2a4ecd2aea97eb4b1212faf62a","contract":["expect(received).toBe(expected) asserts strict primitive equality and reference identity","expect(received).toEqual(expected) asserts deep equality over nested objects and arrays","expect(fn).toThrow(expected) captures errors and asserts exception messages or error instances","expect.extend(customMatchers) registers custom assertion matchers returning pass status and message functions","expect(promise).resolves and expect(promise).rejects unwrap async promises for chained assertions","expect.assertions(count) verifies that the exact number of assertions were executed during a test","expect.soft(received) performs assertions without immediately halting test execution upon failure"],"goal":"verify vitest.expect in pkg:npm/vitest@4.1.11","kind":"HOW","packages":["pkg:npm/vitest@4.1.11"],"schemaVersion":1,"symbols":["vitest.expect"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"cjs","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/vitest@4.1.11"],"schemaVersion":1,"subject":"pkg:npm/vitest@4.1.11","symbols":["vitest.expect"],"verifierAdapter":"node-typescript@1"}
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package.json
{
  "name": "sample-vitest-expect",
  "version": "1.0.0",
  "type": "module",
  "dependencies": {
    "vitest": "4.1.11"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify vitest.expect in pkg:npm/vitest@4.1.11",
  "kind": "HOW",
  "packages": [
    "pkg:npm/vitest@4.1.11"
  ],
  "symbols": [
    "vitest.expect"
  ]
}
src/index.mjs
import { expect } from 'vitest';

/**
 * Validates strict primitive equality and reference identity using expect.toBe.
 *
 * @param {unknown} received - The actual value.
 * @param {unknown} expected - The expected value.
 * @returns {boolean} True if assertion passes.
 */
export function validateStrictEquality(received, expected) {
  expect(received).toBe(expected);
  return true;
}

/**
 * Validates deep equality of objects or arrays using expect.toEqual.
 *
 * @param {unknown} received - The actual data.
 * @param {unknown} expected - The expected deep structure.
 * @returns {boolean} True if assertion passes.
 */
export function validateDeepEquality(received, expected) {
  expect(received).toEqual(expected);
  return true;
}

/**
 * Validates that a callback throws the expected error using expect.toThrow.
 *
 * @param {() => void} fn - Function to invoke.
 * @param {string | RegExp | ErrorConstructor} [expectedError] - Expected error message, pattern, or constructor.
 * @returns {boolean} True if assertion passes.
 */
export function validateThrows(fn, expectedError) {
  if (expectedError !== undefined) {
    expect(fn).toThrow(expectedError);
  } else {
    expect(fn).toThrow();
  }
  return true;
}

/**
 * Validates that a promise resolves to an expected value using expect.resolves.
 *
 * @param {Promise<unknown>} promise - The promise to check.
 * @param {unknown} expected - The expected resolved value.
 * @returns {Promise<boolean>} True if assertion passes.
 */
export async function validateResolves(promise, expected) {
  await expect(promise).resolves.toBe(expected);
  return true;
}

/**
 * Validates that a promise rejects with an expected error using expect.rejects.
 *
 * @param {Promise<unknown>} promise - The promise to check.
 * @param {string | RegExp | ErrorConstructor} expectedError - Expected error.
 * @returns {Promise<boolean>} True if assertion passes.
 */
export async function validateRejects(promise, expectedError) {
  await expect(promise).rejects.toThrow(expectedError);
  return true;
}

/**
 * Registers a custom matcher onto Vitest's expect instance.
 *
 * @param {string} matcherName - Name of the matcher.
 * @param {(received: unknown, ...args: unknown[]) => { pass: boolean; message: () => string }} matcherFn - Matcher implementation.
 */
export function registerCustomMatcher(matcherName, matcherFn) {
  expect.extend({
    [matcherName]: matcherFn,
  });
}

export { expect };
test/contract.mjs
import { startVitest } from 'vitest/node';

const vitest = await startVitest('test', ['test/contract.test.mjs'], {
  watch: false,
  run: true,
});

if (!vitest) {
  console.error('Failed to initialize vitest');
  process.exit(1);
}

const files = vitest.state.getFiles();
const allPassed = files.length > 0 && files.every(f => f.result?.state === 'pass');
await vitest.close();

if (!allPassed) {
  console.error('Vitest contract test failed');
  process.exit(1);
}

console.log('Contract test passed.');
test/contract.test.mjs
import { describe, it, expect } from 'vitest';
import {
  validateStrictEquality,
  validateDeepEquality,
  validateThrows,
  validateResolves,
  validateRejects,
  registerCustomMatcher,
} from '../src/index.mjs';

describe('vitest.expect', () => {
  it('expect(received).toBe(expected) asserts strict primitive equality and reference identity', () => {
    expect(42).toBe(42);
    expect('vitest').toBe('vitest');
    expect(true).toBe(true);

    const ref = { id: 10 };
    expect(ref).toBe(ref);
    expect({ id: 10 }).not.toBe(ref);

    expect(validateStrictEquality(100, 100)).toBe(true);
  });

  it('expect(received).toEqual(expected) asserts deep equality over nested objects and arrays', () => {
    const objA = { user: { name: 'Alice', roles: ['admin', 'viewer'] }, active: true };
    const objB = { user: { name: 'Alice', roles: ['admin', 'viewer'] }, active: true };

    expect(objA).toEqual(objB);
    expect([1, [2, 3]]).toEqual([1, [2, 3]]);
    expect(validateDeepEquality(objA, objB)).toBe(true);
  });

  it('expect(fn).toThrow(expected) captures errors and asserts exception messages or error instances', () => {
    const errorThrower = () => {
      throw new TypeError('Invalid input provided');
    };

    expect(errorThrower).toThrow();
    expect(errorThrower).toThrow(TypeError);
    expect(errorThrower).toThrow('Invalid input provided');
    expect(errorThrower).toThrow(/Invalid input/);
    expect(validateThrows(errorThrower, TypeError)).toBe(true);
  });

  it('expect.extend(customMatchers) registers custom assertion matchers returning pass status and message functions', () => {
    registerCustomMatcher('toBeEvenNumber', (received) => {
      const pass = typeof received === 'number' && received % 2 === 0;
      return {
        pass,
        message: () => `expected ${received} ${pass ? 'not ' : ''}to be an even number`,
      };
    });

    expect(4).toBeEvenNumber();
    expect(5).not.toBeEvenNumber();
  });

  it('expect(promise).resolves and expect(promise).rejects unwrap async promises for chained assertions', async () => {
    const successPromise = Promise.resolve('completed payload');
    const failurePromise = Promise.reject(new Error('async rejection reason'));

    await expect(successPromise).resolves.toBe('completed payload');
    await expect(failurePromise).rejects.toThrow('async rejection reason');

    await expect(validateResolves(Promise.resolve(999), 999)).resolves.toBe(true);
    await expect(validateRejects(Promise.reject(new Error('fail')), 'fail')).resolves.toBe(true);
  });

  it('expect.assertions(count) verifies that the exact number of assertions were executed during a test', () => {
    expect.assertions(3);

    expect(1 + 1).toBe(2);
    expect('foo').toEqual('foo');
    expect(true).toBeTruthy();
  });

  it('expect.soft(received) performs assertions without immediately halting test execution upon failure', () => {
    expect.soft(10).toBe(10);
    expect.soft('hello').toContain('ell');
    expect.soft({ status: 'ok' }).toEqual({ status: 'ok' });
  });
});

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