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@jest/console 29.7.0: BufferedConsole

검증된 샘플 — npm @jest/console 29.7.0: BufferedConsole. node 22 · linux alpine/x64 · docker에서 contract를 실행해 통과했습니다: BufferedConsole instances buffer log, info…

sha256:98ec89d794b5a9f6cd63a8557d8dbf00fe7b259fa79e859c2035cc0e42faac65

이 네트워크가 제공하는 것은 하나입니다. 빌드되는 샘플. 샌드박스에서 돌리고 서명된 영수증을 보관합니다. 등급을 매기지 않고 무엇도 보증하지 않습니다 — 같은 코드가 당신 환경에서 빌드되는지는 측정한 적이 없습니다. 통과한 계약 영수증을 낸 서로 다른 서명 키의 수입니다. 하나면 작성자 혼자이고, 둘 이상이면 다른 사람도 빌드했다는 뜻입니다. 키는 스스로 만드는 것이고 뒤에 등록된 신원이 없으므로, 세는 것은 사람이 아니라 키입니다. MIT-0

실행 증거

선언된 환경과 서명된 실행을 분리해 두었습니다. 이 샘플이 무엇을 어디서 실행했는지 그대로 볼 수 있습니다.

증거 기준
서명된 컨트랙트 통과
검증 영수증
1
빌드한 서명 키
1
선언된 환경 node 22.23 linux 24 · ubuntu · glibc 2.39 x64 node 22.23 javascript npm 10

검증 실행 환경

환경 컨트랙트 단계 실행일
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…		 2026-08-26

케이스

HOW
목표
verify @jest/console.BufferedConsole in pkg:npm/%40jest/console@29.7.0
패키지
심벌
  • @jest/console.BufferedConsole
환경
node 22.23.2
생성일
2026-08-26T06:48:33Z

컨트랙트

  1. BufferedConsole instances buffer log, info, warn, error, and debug messages with type, message, and caller origin stack trace
  2. BufferedConsole.write appends structured log entries with specified log type directly to a target buffer array
  3. BufferedConsole manages indentation levels for grouped logs with group and groupCollapsed while groupEnd resets indentation
  4. BufferedConsole tracks execution duration with time and timeEnd, and invocation counts with count and countReset
  5. BufferedConsole.assert logs an AssertionError entry when condition is falsy and ignores truthy conditions
  6. BufferedConsole.dir formats JavaScript objects into inspectable string entries in the buffer
  7. captureConsoleLogs intercepts standard console output during function execution and restores the original global console

파일

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

소스 아티팩트 내려받기 (tar.gz)

소스

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 @jest/console.BufferedConsole in pkg:npm/%40jest/console@29.7.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40jest/console@29.7.0
Demonstrate these symbols/APIs:
  - @jest/console.BufferedConsole
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - packageManager: npm@10.9.8
  - runtime: node@22.23.2

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:a53b0612b3b9c3187b716af49eb2dd936bb5879049d22638bf8c7c58b818f57f","constraints":{"executionContext":"node"},"contract":["BufferedConsole instances buffer log, info, warn, error, and debug messages with type, message, and caller origin stack trace","BufferedConsole.write appends structured log entries with specified log type directly to a target buffer array","BufferedConsole manages indentation levels for grouped logs with group and groupCollapsed while groupEnd resets indentation","BufferedConsole tracks execution duration with time and timeEnd, and invocation counts with count and countReset","BufferedConsole.assert logs an AssertionError entry when condition is falsy and ignores truthy conditions","BufferedConsole.dir formats JavaScript objects into inspectable string entries in the buffer","captureConsoleLogs intercepts standard console output during function execution and restores the original global console"],"goal":"verify @jest/console.BufferedConsole in pkg:npm/%40jest/console@29.7.0","kind":"HOW","packages":["pkg:npm/%40jest/console@29.7.0"],"schemaVersion":1,"symbols":["@jest/console.BufferedConsole"]},"contractCommand":["node","test/contract.js"],"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/%40jest/console@29.7.0"],"schemaVersion":1,"subject":"pkg:npm/%40jest/console@29.7.0","symbols":["@jest/console.BufferedConsole"],"verifierAdapter":"node-typescript@1"}
index.js
'use strict';

const { BufferedConsole } = require('@jest/console');

/**
 * Creates an instance of BufferedConsole.
 * @param {Function} [getSourceMaps] - Optional function that returns source map information.
 * @returns {BufferedConsole} A new BufferedConsole instance.
 */
function createBufferedConsole(getSourceMaps = () => null) {
  return new BufferedConsole(getSourceMaps);
}

/**
 * Appends a log entry directly to a buffer array using BufferedConsole.write.
 * @param {Array<object>} buffer - Destination buffer array.
 * @param {string} type - Log type (e.g. 'log', 'warn', 'error').
 * @param {string} message - The message text.
 * @param {number} [level=0] - Indentation level.
 * @returns {Array<object>} The modified buffer.
 */
function writeToBuffer(buffer, type, message, level = 0) {
  BufferedConsole.write(buffer, type, message, level);
  return buffer;
}

/**
 * Executes a function while intercepting global console calls into a BufferedConsole.
 * Restores global console upon completion or error.
 * @param {Function} fn - Synchronous function to execute with captured console.
 * @returns {{ result: any, buffer: Array<object>, console: BufferedConsole }} Execution result and captured buffer.
 */
function captureConsoleLogs(fn) {
  const bufferedConsole = createBufferedConsole();
  const originalConsole = global.console;
  let result;
  try {
    global.console = bufferedConsole;
    result = fn(bufferedConsole);
  } finally {
    global.console = originalConsole;
  }
  const buffer = bufferedConsole.getBuffer() || [];
  return {
    result,
    buffer,
    console: bufferedConsole
  };
}

module.exports = {
  BufferedConsole,
  createBufferedConsole,
  writeToBuffer,
  captureConsoleLogs
};
package-lock.json
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  "name": "sample-jest-console-buffered",
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  "lockfileVersion": 3,
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      "license": "MIT",
      "dependencies": {
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}
package.json
{
  "name": "sample-jest-console-buffered",
  "version": "1.0.0",
  "private": true,
  "description": "verify @jest/console.BufferedConsole in pkg:npm/%40jest/console@29.7.0",
  "main": "index.js",
  "scripts": {
    "test": "node test/contract.js"
  },
  "dependencies": {
    "@jest/console": "29.7.0"
  },
  "license": "MIT-0"
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify @jest/console.BufferedConsole in pkg:npm/%40jest/console@29.7.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40jest/console@29.7.0"
  ],
  "symbols": [
    "@jest/console.BufferedConsole"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}
test/contract.js
'use strict';

const assert = require('assert');
const {
  BufferedConsole,
  createBufferedConsole,
  writeToBuffer,
  captureConsoleLogs
} = require('../index.js');

function testBufferedConsoleBasicLogging() {
  const c = createBufferedConsole();
  c.log('sample log %s', 'message');
  c.info('sample info message');
  c.warn('sample warn message');
  c.error('sample error message');
  c.debug('sample debug message');

  const buffer = c.getBuffer();
  assert.ok(Array.isArray(buffer), 'buffer should be an array');
  assert.strictEqual(buffer.length, 5, 'buffer should have 5 items');

  assert.strictEqual(buffer[0].type, 'log');
  assert.strictEqual(buffer[0].message, 'sample log message');
  assert.ok(typeof buffer[0].origin === 'string' && buffer[0].origin.length > 0);

  assert.strictEqual(buffer[1].type, 'info');
  assert.strictEqual(buffer[1].message, 'sample info message');

  assert.strictEqual(buffer[2].type, 'warn');
  assert.strictEqual(buffer[2].message, 'sample warn message');

  assert.strictEqual(buffer[3].type, 'error');
  assert.strictEqual(buffer[3].message, 'sample error message');

  assert.strictEqual(buffer[4].type, 'debug');
  assert.strictEqual(buffer[4].message, 'sample debug message');
}

function testBufferedConsoleStaticWrite() {
  const targetBuffer = [];
  writeToBuffer(targetBuffer, 'warn', 'direct buffer append message', 1);

  assert.strictEqual(targetBuffer.length, 1);
  assert.strictEqual(targetBuffer[0].type, 'warn');
  assert.strictEqual(targetBuffer[0].message, 'direct buffer append message');
  assert.ok(typeof targetBuffer[0].origin === 'string');
}

function testBufferedConsoleGrouping() {
  const c = createBufferedConsole();
  c.group('Suite 1');
  c.log('test step 1');
  c.groupCollapsed('Nested Step');
  c.log('inner detail');
  c.groupEnd();
  c.log('test step 2');
  c.groupEnd();

  const buffer = c.getBuffer();
  assert.strictEqual(buffer.length, 5);

  assert.strictEqual(buffer[0].type, 'group');
  assert.strictEqual(buffer[0].message, '  Suite 1');

  assert.strictEqual(buffer[1].type, 'log');
  assert.strictEqual(buffer[1].message, '  test step 1');

  assert.strictEqual(buffer[2].type, 'groupCollapsed');
  assert.strictEqual(buffer[2].message, '    Nested Step');

  assert.strictEqual(buffer[3].type, 'log');
  assert.strictEqual(buffer[3].message, '    inner detail');

  assert.strictEqual(buffer[4].type, 'log');
  assert.strictEqual(buffer[4].message, '  test step 2');
}

function testBufferedConsoleTimingAndCounting() {
  const c = createBufferedConsole();
  c.count('invocations');
  c.count('invocations');
  c.countReset('invocations');
  c.count('invocations');

  c.time('benchmark');
  c.timeEnd('benchmark');

  const buffer = c.getBuffer();
  assert.strictEqual(buffer.length, 4);

  assert.strictEqual(buffer[0].type, 'count');
  assert.strictEqual(buffer[0].message, 'invocations: 1');

  assert.strictEqual(buffer[1].type, 'count');
  assert.strictEqual(buffer[1].message, 'invocations: 2');

  assert.strictEqual(buffer[2].type, 'count');
  assert.strictEqual(buffer[2].message, 'invocations: 1');

  assert.strictEqual(buffer[3].type, 'time');
  assert.match(buffer[3].message, /^benchmark: \d+(\.\d+)?\s*(ms|s)$/);
}

function testBufferedConsoleAssertion() {
  const c = createBufferedConsole();
  c.assert(true, 'truthy condition must not produce buffer entry');
  assert.strictEqual(c.getBuffer(), undefined);

  c.assert(false, 'condition failed as expected');
  const buffer = c.getBuffer();
  assert.strictEqual(buffer.length, 1);
  assert.strictEqual(buffer[0].type, 'assert');
  assert.match(buffer[0].message, /AssertionError.*condition failed as expected/);
}

function testBufferedConsoleDir() {
  const c = createBufferedConsole();
  c.dir({ key: 'value', number: 123 });

  const buffer = c.getBuffer();
  assert.strictEqual(buffer.length, 1);
  assert.strictEqual(buffer[0].type, 'dir');
  assert.match(buffer[0].message, /key:\s*'value'/);
}

function testCaptureConsoleLogs() {
  const { result, buffer } = captureConsoleLogs((localConsole) => {
    console.log('intercepted standard log');
    console.error('intercepted standard error');
    return 42;
  });

  assert.strictEqual(result, 42);
  assert.strictEqual(buffer.length, 2);
  assert.strictEqual(buffer[0].type, 'log');
  assert.strictEqual(buffer[0].message, 'intercepted standard log');
  assert.strictEqual(buffer[1].type, 'error');
  assert.strictEqual(buffer[1].message, 'intercepted standard error');
}

function main() {
  testBufferedConsoleBasicLogging();
  testBufferedConsoleStaticWrite();
  testBufferedConsoleGrouping();
  testBufferedConsoleTimingAndCounting();
  testBufferedConsoleAssertion();
  testBufferedConsoleDir();
  testCaptureConsoleLogs();
  console.log('All BufferedConsole contract tests passed successfully.');
}

main();

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