CodeSampleX

Ejemplo

jest-watcher 29.7.0: KEYS

Muestra verificada para npm jest-watcher 29.7.0: KEYS. El contrato se ejecutó en node 22 · linux debian/x64 · docker y pasó: KEYS exports ANSI escape…

sha256:7fd9e9d60bd5d8e28f1a99fa8071f0c06d56c8edca3c215e012c47d8fd7840d0

Esta red ofrece una sola cosa: una muestra que compila. La ejecutó en un sandbox y guardó el recibo firmado. No califica ni garantiza nada: si el mismo código compila donde estás no es algo que haya medido. Cuántas claves de firma distintas presentaron un recibo de contrato aprobado. Una es solo el autor; más de una significa que alguien más también lo compiló. Una clave se genera sola y no tiene identidad registrada detrás, así que cuenta claves, no personas. MIT-0

Evidencia de ejecución

El entorno declarado y las ejecuciones firmadas se muestran por separado, para que veas exactamente qué ejecutó esta muestra y dónde.

Base de evidencia
Contrato firmado aprobado
Recibos de verificación
1
Claves de firma que lo compilaron
1
Entorno declarado linux 24 · ubuntu · glibc 2.39 x64 npm

Entornos de las ejecuciones de verificación

Entorno Contrato Etapas Ejecución
node 22 · linux debian/x64 · docker ed25519:c1973797be207ac4 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1node:22@sha256:8a34c4ab3ea2…		 2026-09-05

Caso

HOW
Objetivo
verify jest-watcher.KEYS in pkg:npm/jest-watcher@29.7.0
Paquetes
Símbolos
  • jest-watcher.KEYS
Creado
2026-09-05T19:08:32Z

Contrato

  1. KEYS exports ANSI escape sequences for arrow keys (ARROW_UP, ARROW_DOWN, ARROW_LEFT, ARROW_RIGHT)
  2. KEYS exports standard control characters (ENTER, ESCAPE, CONTROL_C, CONTROL_D, CONTROL_U)
  3. KEYS exports BACKSPACE character buffer decoded as 0x7F on POSIX and 0x08 on Windows
  4. KEYS defines an exact set of 10 standard terminal key codes as non-empty strings
  5. Prompt handles KEYS.ENTER to submit input and exit entering state
  6. Prompt handles KEYS.ESCAPE to cancel input and exit entering state
  7. Prompt handles KEYS.BACKSPACE to delete characters and KEYS.CONTROL_U to clear entire line
  8. Prompt handles KEYS.ARROW_UP and KEYS.ARROW_DOWN to change selection offset within prompt bounds

Archivos

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

Descargar el artefacto de código fuente (tar.gz)

Código fuente

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-watcher.KEYS in pkg:npm/jest-watcher@29.7.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/jest-watcher@29.7.0
Demonstrate these symbols/APIs:
  - jest-watcher.KEYS

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:sha256:00f2df5c0db7bb79932edc610ac6ccb56477b6ef7a72c1d74f58942b71462ee6","contract":["KEYS exports ANSI escape sequences for arrow keys (ARROW_UP, ARROW_DOWN, ARROW_LEFT, ARROW_RIGHT)","KEYS exports standard control characters (ENTER, ESCAPE, CONTROL_C, CONTROL_D, CONTROL_U)","KEYS exports BACKSPACE character buffer decoded as 0x7F on POSIX and 0x08 on Windows","KEYS defines an exact set of 10 standard terminal key codes as non-empty strings","Prompt handles KEYS.ENTER to submit input and exit entering state","Prompt handles KEYS.ESCAPE to cancel input and exit entering state","Prompt handles KEYS.BACKSPACE to delete characters and KEYS.CONTROL_U to clear entire line","Prompt handles KEYS.ARROW_UP and KEYS.ARROW_DOWN to change selection offset within prompt bounds"],"goal":"verify jest-watcher.KEYS in pkg:npm/jest-watcher@29.7.0","kind":"HOW","packages":["pkg:npm/jest-watcher@29.7.0"],"schemaVersion":1,"symbols":["jest-watcher.KEYS"]},"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-watcher@29.7.0"],"schemaVersion":1,"subject":"pkg:npm/jest-watcher@29.7.0","symbols":["jest-watcher.KEYS"],"verifierAdapter":"node-typescript@1"}
package-lock.json
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  "name": "verify-jest-watcher-keys",
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  "lockfileVersion": 3,
  "requires": true,
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    "": {
      "name": "verify-jest-watcher-keys",
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package.json
{
  "name": "verify-jest-watcher-keys",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "license": "MIT-0",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "jest-watcher": "29.7.0"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify jest-watcher.KEYS in pkg:npm/jest-watcher@29.7.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/jest-watcher@29.7.0"
  ],
  "symbols": [
    "jest-watcher.KEYS"
  ]
}
src/index.mjs
import { KEYS, Prompt } from 'jest-watcher';

/**
 * Returns the key name for a given key string/sequence if recognized in KEYS.
 * @param {string} char
 * @returns {string|null}
 */
export function getKeyName(char) {
  for (const [name, seq] of Object.entries(KEYS)) {
    if (seq === char) {
      return name;
    }
  }
  return null;
}

/**
 * Checks if a key sequence is an arrow navigation key.
 * @param {string} key
 * @returns {boolean}
 */
export function isArrowKey(key) {
  return (
    key === KEYS.ARROW_UP ||
    key === KEYS.ARROW_DOWN ||
    key === KEYS.ARROW_LEFT ||
    key === KEYS.ARROW_RIGHT
  );
}

/**
 * Checks if a key sequence is a control action key (ENTER, ESCAPE, CONTROL_C, CONTROL_D, CONTROL_U).
 * @param {string} key
 * @returns {boolean}
 */
export function isControlKey(key) {
  return (
    key === KEYS.ENTER ||
    key === KEYS.ESCAPE ||
    key === KEYS.CONTROL_C ||
    key === KEYS.CONTROL_D ||
    key === KEYS.CONTROL_U
  );
}

/**
 * Simulates typing a sequence of keys into a Jest Watcher Prompt.
 * @param {Prompt} prompt
 * @param {Iterable<string>} keys
 */
export function feedKeys(prompt, keys) {
  for (const key of keys) {
    prompt.put(key);
  }
}

export { KEYS, Prompt };
export default KEYS;
test/contract.mjs
import assert from 'node:assert/strict';
import { KEYS, Prompt } from 'jest-watcher';
import { getKeyName, isArrowKey, isControlKey, feedKeys } from '../src/index.mjs';

// 1. KEYS exports ANSI escape sequences for arrow keys (ARROW_UP, ARROW_DOWN, ARROW_LEFT, ARROW_RIGHT)
{
  assert.equal(KEYS.ARROW_UP, '\x1b[A');
  assert.equal(KEYS.ARROW_DOWN, '\x1b[B');
  assert.equal(KEYS.ARROW_RIGHT, '\x1b[C');
  assert.equal(KEYS.ARROW_LEFT, '\x1b[D');

  assert.equal(isArrowKey(KEYS.ARROW_UP), true);
  assert.equal(isArrowKey(KEYS.ARROW_DOWN), true);
  assert.equal(isArrowKey(KEYS.ARROW_LEFT), true);
  assert.equal(isArrowKey(KEYS.ARROW_RIGHT), true);
  assert.equal(isArrowKey(KEYS.ENTER), false);
}

// 2. KEYS exports standard control characters (ENTER, ESCAPE, CONTROL_C, CONTROL_D, CONTROL_U)
{
  assert.equal(KEYS.ENTER, '\r');
  assert.equal(KEYS.ESCAPE, '\x1b');
  assert.equal(KEYS.CONTROL_C, '\x03');
  assert.equal(KEYS.CONTROL_D, '\x04');
  assert.equal(KEYS.CONTROL_U, '\x15');

  assert.equal(isControlKey(KEYS.ENTER), true);
  assert.equal(isControlKey(KEYS.ESCAPE), true);
  assert.equal(isControlKey(KEYS.CONTROL_C), true);
  assert.equal(isControlKey(KEYS.CONTROL_D), true);
  assert.equal(isControlKey(KEYS.CONTROL_U), true);
  assert.equal(isControlKey(KEYS.ARROW_UP), false);
}

// 3. KEYS exports BACKSPACE character buffer decoded as 0x7F on POSIX and 0x08 on Windows
{
  const expectedBackspace = process.platform === 'win32' ? '\x08' : '\x7f';
  assert.equal(KEYS.BACKSPACE, expectedBackspace);
  assert.equal(getKeyName(KEYS.BACKSPACE), 'BACKSPACE');
}

// 4. KEYS defines an exact set of 10 standard terminal key codes as non-empty strings
{
  const expectedKeys = [
    'ARROW_DOWN',
    'ARROW_LEFT',
    'ARROW_RIGHT',
    'ARROW_UP',
    'BACKSPACE',
    'CONTROL_C',
    'CONTROL_D',
    'CONTROL_U',
    'ENTER',
    'ESCAPE'
  ];
  assert.deepEqual(Object.keys(KEYS).sort(), expectedKeys.sort());

  for (const [keyName, value] of Object.entries(KEYS)) {
    assert.equal(typeof value, 'string');
    assert.ok(value.length > 0);
    assert.equal(getKeyName(value), keyName);
  }
}

// 5. Prompt handles KEYS.ENTER to submit input and exit entering state
{
  const prompt = new Prompt();
  let submitted = null;
  prompt.enter(
    () => {},
    (val) => { submitted = val; },
    () => {}
  );
  assert.equal(prompt.isEntering(), true);

  feedKeys(prompt, ['t', 'e', 's', 't', KEYS.ENTER]);

  assert.equal(submitted, 'test');
  assert.equal(prompt.isEntering(), false);
}

// 6. Prompt handles KEYS.ESCAPE to cancel input and exit entering state
{
  const prompt = new Prompt();
  let cancelled = null;
  prompt.enter(
    () => {},
    () => {},
    (val) => { cancelled = val; }
  );
  assert.equal(prompt.isEntering(), true);

  feedKeys(prompt, ['f', 'i', 'l', 't', 'e', 'r', KEYS.ESCAPE]);

  assert.equal(cancelled, 'filter');
  assert.equal(prompt.isEntering(), false);
}

// 7. Prompt handles KEYS.BACKSPACE to delete characters and KEYS.CONTROL_U to clear entire line
{
  const prompt = new Prompt();
  let currentPattern = '';
  prompt.enter(
    (pattern) => { currentPattern = pattern; },
    () => {},
    () => {}
  );

  feedKeys(prompt, ['f', 'o', 'o', 'b', 'a', 'r']);
  assert.equal(currentPattern, 'foobar');

  prompt.put(KEYS.BACKSPACE);
  assert.equal(currentPattern, 'fooba');

  prompt.put(KEYS.CONTROL_U);
  assert.equal(currentPattern, '');
}

// 8. Prompt handles KEYS.ARROW_UP and KEYS.ARROW_DOWN to change selection offset within prompt bounds
{
  const prompt = new Prompt();
  let currentOffset = null;
  prompt.enter(
    (pattern, options) => { currentOffset = options.offset; },
    () => {},
    () => {}
  );
  prompt.setPromptLength(3);
  assert.equal(currentOffset, -1);

  prompt.put(KEYS.ARROW_DOWN);
  assert.equal(currentOffset, 0);

  prompt.put(KEYS.ARROW_DOWN);
  assert.equal(currentOffset, 1);

  prompt.put(KEYS.ARROW_DOWN);
  assert.equal(currentOffset, 2);

  // Clamped to max offset (promptLength - 1)
  prompt.put(KEYS.ARROW_DOWN);
  assert.equal(currentOffset, 2);

  prompt.put(KEYS.ARROW_UP);
  assert.equal(currentOffset, 1);

  prompt.put(KEYS.ARROW_UP);
  assert.equal(currentOffset, 0);

  // Decrements to -1 (no selection)
  prompt.put(KEYS.ARROW_UP);
  assert.equal(currentOffset, -1);

  // Clamped to -1
  prompt.put(KEYS.ARROW_UP);
  assert.equal(currentOffset, -1);
}

console.log('Contract tests passed successfully.');

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