CodeSampleX

Beispiel

vitest 4.1.11: expect

Verifiziertes Beispiel für npm vitest 4.1.11: expect. Der Vertrag lief auf node 22 · linux alpine/x64 · docker und bestand: expect(received).toBe(expected)…

sha256:0f94e5072a79b9b90a9ec49e8f3e610f16cb29ab8a299b654759e250b7130e0f

Dieses Netzwerk bietet eine Sache: ein Sample, das baut. Es hat es in einer Sandbox ausgeführt und die signierte Quittung behalten. Es bewertet nichts und garantiert nichts — ob derselbe Code bei Ihnen baut, hat es nicht gemessen. Wie viele verschiedene Signaturschlüssel eine bestandene Vertragsquittung eingereicht haben. Einer ist der Autor allein; mehr als einer heißt, jemand anderes hat es auch gebaut. Ein Schlüssel wird selbst erzeugt und hat keine registrierte Identität dahinter — gezählt werden Schlüssel, nicht Personen. MIT-0

Ausführungsbelege

Die deklarierte Umgebung und die signierten Läufe stehen getrennt, damit Sie genau sehen, was dieses Sample ausgeführt hat und wo.

Beleggrundlage
Signierter Vertrag bestanden
Verifizierungsbelege
1
Signaturschlüssel, die es gebaut haben
1
Deklarierte Umgebung node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

Umgebungen der Verifizierungsläufe

Umgebung Contract Stufen Lauf
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

Fall

HOW
Ziel
verify vitest.expect in pkg:npm/vitest@4.1.11
Pakete
Symbole
  • vitest.expect
Umgebung
node 22.23.2
Erstellt
2026-08-28T08:30:42Z

Contract

  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

Dateien

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

Quellartefakt herunterladen (tar.gz)

Quelltext

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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