CodeSampleX

Exemplo

jest-message-util 29.7.0

Amostra verificada para npm jest-message-util 29.7.0. O contrato rodou em node 22 · linux alpine/x64 · docker e passou: separateMessageFromStack separates…

sha256:f78036a65e8e8c24469ff4db6d55960ee94199076026317501967707e51edf80

Esta rede oferece uma coisa: uma amostra que compila. Ela a executou em um sandbox e guardou o recibo assinado. Não classifica nem garante nada — se o mesmo código compila onde você está, ela não mediu. Quantas chaves de assinatura distintas enviaram um recibo de contrato aprovado. Uma é só o autor; mais de uma significa que outra pessoa também o compilou. Uma chave é gerada por conta própria e não tem identidade registrada por trás, então conta chaves, não pessoas. MIT-0

Evidência de execução

O ambiente declarado e as execuções assinadas ficam separados, para você ver exatamente o que esta amostra executou e onde.

Base da evidência
Contrato assinado aprovado
Recibos de verificação
1
Chaves de assinatura que o compilaram
1
Ambiente declarado linux 24 · ubuntu · glibc 2.39 x64 npm

Ambientes das execuções de verificação

Ambiente Contrato Etapas Execução
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…		 2026-08-27

Caso

HOW
Objetivo
verify pkg:npm/jest-message-util@29.7.0
Pacotes
Criado
2026-08-27T15:26:45Z

Contrato

  1. separateMessageFromStack separates the error message header from stack trace lines
  2. getStackTraceLines filters out Node.js internal runtime frames from stack traces
  3. getTopFrame parses the topmost call frame into file, line, and column details
  4. formatPath converts absolute paths within stack trace lines to rootDir-relative paths
  5. formatStackTrace formats and cleans error stack traces against configuration options
  6. formatExecError formats uncaught execution errors with test suite failure headers and stacks
  7. formatResultsErrors formats test failure assertion results with ancestor suite titles
  8. indentAllLines indents multiline text with standard indentation prefix

Arquivos

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

Baixar o artefato de código-fonte (tar.gz)

Código-fonte

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 pkg:npm/jest-message-util@29.7.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/jest-message-util@29.7.0

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:c45ee262031e6c2f8d85ff38b382e0b3450fc2cde731b367f94a494e6861472f","contract":["separateMessageFromStack separates the error message header from stack trace lines","getStackTraceLines filters out Node.js internal runtime frames from stack traces","getTopFrame parses the topmost call frame into file, line, and column details","formatPath converts absolute paths within stack trace lines to rootDir-relative paths","formatStackTrace formats and cleans error stack traces against configuration options","formatExecError formats uncaught execution errors with test suite failure headers and stacks","formatResultsErrors formats test failure assertion results with ancestor suite titles","indentAllLines indents multiline text with standard indentation prefix"],"goal":"verify pkg:npm/jest-message-util@29.7.0","kind":"HOW","packages":["pkg:npm/jest-message-util@29.7.0"],"schemaVersion":1},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"npm","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/jest-message-util@29.7.0"],"schemaVersion":1,"subject":"pkg:npm/jest-message-util@29.7.0","verifierAdapter":"node-typescript@1"}
package-lock.json
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  "name": "sample-jest-message-util",
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  "lockfileVersion": 3,
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      },
      "engines": {
        "node": ">=8.0"
      }
    },
    "node_modules/undici-types": {
      "version": "8.3.0",
      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-8.3.0.tgz",
      "integrity": "sha512-j375ScV60dom+YkPFIfTLcOiPxkN/buHz5GobjLhixFuANaNs3C9l4GmrWqejgXWJ7BbJcFYpTEUkS1Ge8bpZQ==",
      "license": "MIT"
    }
  }
}
package.json
{
  "name": "sample-jest-message-util",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "license": "MIT-0",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "jest-message-util": "29.7.0"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify pkg:npm/jest-message-util@29.7.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/jest-message-util@29.7.0"
  ]
}
src/index.mjs
import {
  formatExecError,
  formatPath,
  formatResultsErrors,
  formatStackTrace,
  getStackTraceLines,
  getTopFrame,
  indentAllLines,
  separateMessageFromStack,
} from 'jest-message-util';

export {
  formatExecError,
  formatPath,
  formatResultsErrors,
  formatStackTrace,
  getStackTraceLines,
  getTopFrame,
  indentAllLines,
  separateMessageFromStack,
};

export function cleanStackTrace(stack, rootDir = process.cwd(), noStackTrace = false) {
  return formatStackTrace(stack, { rootDir, testMatch: [] }, { noStackTrace });
}

export function formatErrorMessage(error, rootDir = process.cwd(), noTitle = false) {
  return formatExecError(error, { rootDir, testMatch: [] }, { noStackTrace: false }, undefined, undefined, noTitle);
}

export function getTopStackLocation(stack) {
  const lines = getStackTraceLines(stack);
  return getTopFrame(lines);
}
test/contract.mjs
import assert from 'node:assert';
import {
  formatExecError,
  formatPath,
  formatResultsErrors,
  formatStackTrace,
  getStackTraceLines,
  getTopFrame,
  indentAllLines,
  separateMessageFromStack,
  cleanStackTrace,
  formatErrorMessage,
  getTopStackLocation,
} from '../src/index.mjs';

const sampleRootDir = '/workspace/project';
const config = { rootDir: sampleRootDir, testMatch: [] };
const options = { noStackTrace: false };

// 1. separateMessageFromStack separates the error message header from stack trace lines
{
  const rawStack = 'Error: something went wrong\n    at Object.<anonymous> (/workspace/project/src/index.js:10:15)\n    at Module._compile (node:internal/modules/cjs/loader:1:1)';
  const result = separateMessageFromStack(rawStack);
  assert.strictEqual(result.message, 'something went wrong');
  assert.strictEqual(result.stack, '\n    at Object.<anonymous> (/workspace/project/src/index.js:10:15)\n    at Module._compile (node:internal/modules/cjs/loader:1:1)');

  const customErrorStack = 'CustomError: validation failed\n    at validate (/workspace/project/src/val.js:5:2)';
  const customResult = separateMessageFromStack(customErrorStack);
  assert.strictEqual(customResult.message, 'CustomError: validation failed');
  assert.strictEqual(customResult.stack, '\n    at validate (/workspace/project/src/val.js:5:2)');
}

// 2. getStackTraceLines filters out Node.js internal runtime frames from stack traces
{
  const rawStack = 'Error: execution error\n    at userFunction (/workspace/project/src/app.js:20:5)\n    at ModuleJob.run (node:internal/modules/esm/module_job:1:1)\n    at async asyncRunEntryPoint (node:internal/modules/run_main:2:2)';
  const lines = getStackTraceLines(rawStack);
  assert.strictEqual(lines.length, 2);
  assert.strictEqual(lines[0], 'Error: execution error');
  assert.strictEqual(lines[1], '    at userFunction (/workspace/project/src/app.js:20:5)');
}

// 3. getTopFrame parses the topmost call frame into file, line, and column details
{
  const lines = [
    'Error: top frame test',
    '    at calculateTotal (/workspace/project/src/calc.js:42:18)',
    '    at runStep (/workspace/project/src/runner.js:10:5)',
  ];
  const topFrame = getTopFrame(lines);
  assert.notStrictEqual(topFrame, null);
  assert.strictEqual(topFrame.file, '/workspace/project/src/calc.js');
  assert.strictEqual(topFrame.line, 42);
  assert.strictEqual(topFrame.column, 18);
  assert.strictEqual(topFrame.function, 'calculateTotal');

  const helperFrame = getTopStackLocation(lines.join('\n'));
  assert.deepStrictEqual(helperFrame, topFrame);

  const emptyFrame = getTopFrame([]);
  assert.strictEqual(emptyFrame, null);
}

// 4. formatPath converts absolute paths within stack trace lines to rootDir-relative paths
{
  const line = '    at Object.<anonymous> (/workspace/project/src/index.js:15:20)';
  const formatted = formatPath(line, config);
  assert.strictEqual(formatted, '    at Object.<anonymous> (src/index.js:15:20)');
}

// 5. formatStackTrace formats and cleans error stack traces against configuration options
{
  const rawStack = 'Error: failed operation\n    at run (/workspace/project/src/index.js:12:10)\n    at node:internal/main:1:1';
  const formatted = formatStackTrace(rawStack, config, options);
  assert(formatted.includes('src/index.js:12:10'));
  assert(!formatted.includes('node:internal'));

  const helperFormatted = cleanStackTrace(rawStack, sampleRootDir, false);
  assert.strictEqual(helperFormatted, formatted);

  const suppressed = formatStackTrace(rawStack, config, { noStackTrace: true });
  assert(suppressed.includes('Error: failed operation'));
  assert(suppressed.includes('src/index.js:12:10'));
}

// 6. formatExecError formats uncaught execution errors with test suite failure headers and stacks
{
  const err = new Error('database connection timeout');
  err.stack = 'Error: database connection timeout\n    at connect (/workspace/project/src/db.js:8:12)\n    at node:internal/process:1:1';
  const formatted = formatExecError(err, config, options);
  assert(formatted.includes('● Test suite failed to run'));
  assert(formatted.includes('database connection timeout'));
  assert(formatted.includes('src/db.js:8:12'));

  const noTitleFormatted = formatErrorMessage(err, sampleRootDir, true);
  assert(!noTitleFormatted.includes('● Test suite failed to run'));
  assert(noTitleFormatted.includes('database connection timeout'));
}

// 7. formatResultsErrors formats test failure assertion results with ancestor suite titles
{
  const testResults = [
    {
      title: 'should validate payload schema',
      ancestorTitles: ['Validator', 'JSON schema'],
      status: 'failed',
      failureMessages: [
        'Error: expect(received).toBe(expected)\n\nExpected: 200\nReceived: 500\n    at Object.<anonymous> (/workspace/project/test/api.test.js:25:10)'
      ],
      failureDetails: [{}]
    }
  ];

  const resultError = formatResultsErrors(testResults, config, options);
  assert.notStrictEqual(resultError, null);
  assert(resultError.includes('● Validator › JSON schema › should validate payload schema'));
  assert(resultError.includes('Expected: 200'));
  assert(resultError.includes('Received: 500'));
  assert(resultError.includes('test/api.test.js:25:10'));
}

// 8. indentAllLines indents multiline text with standard indentation prefix
{
  const input = 'first line\nsecond line\nthird line';
  const indented = indentAllLines(input);
  assert.strictEqual(indented, '    first line\n    second line\n    third line');

  const withEmptyLine = 'first line\n\nsecond line';
  assert.strictEqual(indentAllLines(withEmptyLine), '    first line\n\n    second line');
}

console.log('All jest-message-util contract assertions passed.');

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