CodeSampleX

Exemple

jest-watcher 29.7.0: BaseWatchPlugin

Échantillon vérifié pour npm jest-watcher 29.7.0: BaseWatchPlugin. Le contrat s'est exécuté sur node 22 · linux debian/x64 · docker et a réussi.

sha256:c91cb2afdf95e6d577621ffc93c32f82029c4e3c65d6ddafc2672e8a13b3e7d3

Ce réseau offre une seule chose : un échantillon qui compile. Il l'a exécuté dans un bac à sable et conservé le reçu signé. Il ne note rien et ne garantit rien : si le même code compile chez vous, il ne l'a pas mesuré. Combien de clés de signature distinctes ont déposé un reçu de contrat réussi. Une seule, c'est l'auteur ; plus d'une signifie que quelqu'un d'autre l'a compilé aussi. Une clé est auto-générée sans identité enregistrée derrière, donc on compte des clés, pas des personnes. MIT-0

Preuves d'exécution

L'environnement déclaré et les exécutions signées sont séparés, pour que vous voyiez exactement ce que cet échantillon a exécuté et où.

Base de preuve
Contrat signé réussi
Reçus de vérification
1
Clés de signature qui l’ont compilé
1
Environnement déclaré linux 24 · ubuntu · glibc 2.39 x64 npm

Environnements des exécutions de vérification

Environnement Contrat Étapes Exécution
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

Cas

HOW
Objectif
verify jest-watcher.BaseWatchPlugin in pkg:npm/jest-watcher@29.7.0
Paquets
Symboles
  • jest-watcher.BaseWatchPlugin
Créé
2026-09-05T18:09:55Z

Contrat

  1. BaseWatchPlugin constructor initializes stdin and stdout streams
  2. BaseWatchPlugin default getUsageInfo returns null and run resolves undefined
  3. BaseWatchPlugin default apply and onKey methods execute safely as no-ops
  4. Custom watch plugin extending BaseWatchPlugin overrides getUsageInfo to expose key and prompt configuration
  5. Custom watch plugin extending BaseWatchPlugin overrides apply to subscribe to test suite filtering hooks
  6. Custom watch plugin extending BaseWatchPlugin overrides onKey to handle terminal keypress input
  7. Custom watch plugin extending BaseWatchPlugin overrides run to execute config updates and request test rerun

Fichiers

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

Télécharger l’artefact source (tar.gz)

Code source

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.BaseWatchPlugin 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.BaseWatchPlugin

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:sha256:51671959835431bd2710226905a7f03b037999b7049d12da4959f640697e625a","contract":["BaseWatchPlugin constructor initializes stdin and stdout streams","BaseWatchPlugin default getUsageInfo returns null and run resolves undefined","BaseWatchPlugin default apply and onKey methods execute safely as no-ops","Custom watch plugin extending BaseWatchPlugin overrides getUsageInfo to expose key and prompt configuration","Custom watch plugin extending BaseWatchPlugin overrides apply to subscribe to test suite filtering hooks","Custom watch plugin extending BaseWatchPlugin overrides onKey to handle terminal keypress input","Custom watch plugin extending BaseWatchPlugin overrides run to execute config updates and request test rerun"],"goal":"verify jest-watcher.BaseWatchPlugin in pkg:npm/jest-watcher@29.7.0","kind":"HOW","packages":["pkg:npm/jest-watcher@29.7.0"],"schemaVersion":1,"symbols":["jest-watcher.BaseWatchPlugin"]},"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.BaseWatchPlugin"],"verifierAdapter":"node-typescript@1"}
index.mjs
import { BaseWatchPlugin, JestHook, KEYS } from 'jest-watcher';

export { BaseWatchPlugin, JestHook, KEYS };

export class CustomWatchPlugin extends BaseWatchPlugin {
  constructor(options = {}) {
    super(options);
    this._key = options.key || 'f';
    this._prompt = options.prompt || 'filter by pattern';
    this.filterPattern = null;
    this.applied = false;
  }

  apply(hooks) {
    this.applied = true;
    if (hooks && typeof hooks.shouldRunTestSuite === 'function') {
      hooks.shouldRunTestSuite((testSuite) => {
        if (!this.filterPattern) {
          return true;
        }
        return testSuite.testPath.includes(this.filterPattern);
      });
    }
  }

  getUsageInfo() {
    return {
      key: this._key,
      prompt: this._prompt,
    };
  }

  onKey(key) {
    if (key === KEYS.ESCAPE) {
      this.filterPattern = null;
    }
  }

  async run(globalConfig, updateConfigAndRun) {
    if (typeof updateConfigAndRun === 'function') {
      await updateConfigAndRun({
        testPathPattern: this.filterPattern || '',
      });
      return true;
    }
    return false;
  }
}
package-lock.json
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      "license": "MIT",
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package.json
{
  "name": "sample-jest-watcher-base-watch-plugin",
  "version": "1.0.0",
  "type": "module",
  "dependencies": {
    "jest-watcher": "29.7.0"
  }
}
spec.json
{
  "schemaVersion": 1,
  "goal": "verify jest-watcher.BaseWatchPlugin in pkg:npm/jest-watcher@29.7.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/jest-watcher@29.7.0"
  ],
  "symbols": [
    "jest-watcher.BaseWatchPlugin"
  ]
}
test/contract.mjs
import assert from 'node:assert/strict';
import { BaseWatchPlugin, JestHook, KEYS } from 'jest-watcher';
import { CustomWatchPlugin } from '../index.mjs';

async function run() {
  // 1. BaseWatchPlugin constructor initializes stdin and stdout streams
  {
    const mockStdin = { isTTY: true };
    const mockStdout = { write: () => {} };
    const base = new BaseWatchPlugin({ stdin: mockStdin, stdout: mockStdout });
    assert.equal(base._stdin, mockStdin);
    assert.equal(base._stdout, mockStdout);
  }

  // 2. BaseWatchPlugin default getUsageInfo returns null and run resolves undefined
  {
    const mockStdin = {};
    const mockStdout = {};
    const base = new BaseWatchPlugin({ stdin: mockStdin, stdout: mockStdout });
    assert.equal(base.getUsageInfo({}), null);
    const runResult = await base.run({}, () => {});
    assert.equal(runResult, undefined);
  }

  // 3. BaseWatchPlugin default apply and onKey methods execute safely as no-ops
  {
    const mockStdin = {};
    const mockStdout = {};
    const base = new BaseWatchPlugin({ stdin: mockStdin, stdout: mockStdout });
    assert.doesNotThrow(() => base.apply({}));
    assert.doesNotThrow(() => base.onKey('x'));
  }

  // 4. Custom watch plugin extending BaseWatchPlugin overrides getUsageInfo to expose key and prompt configuration
  {
    const mockStdin = {};
    const mockStdout = {};
    const plugin = new CustomWatchPlugin({
      stdin: mockStdin,
      stdout: mockStdout,
      key: 'p',
      prompt: 'filter by test path pattern',
    });
    const usage = plugin.getUsageInfo({});
    assert.deepEqual(usage, {
      key: 'p',
      prompt: 'filter by test path pattern',
    });
  }

  // 5. Custom watch plugin extending BaseWatchPlugin overrides apply to subscribe to test suite filtering hooks
  {
    const mockStdin = {};
    const mockStdout = {};
    const plugin = new CustomWatchPlugin({ stdin: mockStdin, stdout: mockStdout });
    const hook = new JestHook();

    assert.equal(plugin.applied, false);
    plugin.apply(hook.getSubscriber());
    assert.equal(plugin.applied, true);
    assert.equal(hook.isUsed('shouldRunTestSuite'), true);

    const emitter = hook.getEmitter();
    const allowedSuite = await emitter.shouldRunTestSuite({ testPath: '/workspace/test/unit.test.js' });
    assert.equal(allowedSuite, true);

    plugin.filterPattern = 'component';
    const matchingSuite = await emitter.shouldRunTestSuite({ testPath: '/workspace/test/component.test.js' });
    assert.equal(matchingSuite, true);

    const nonMatchingSuite = await emitter.shouldRunTestSuite({ testPath: '/workspace/test/service.test.js' });
    assert.equal(nonMatchingSuite, false);
  }

  // 6. Custom watch plugin extending BaseWatchPlugin overrides onKey to handle terminal keypress input
  {
    const mockStdin = {};
    const mockStdout = {};
    const plugin = new CustomWatchPlugin({ stdin: mockStdin, stdout: mockStdout });
    const hook = new JestHook();
    plugin.apply(hook.getSubscriber());
    const emitter = hook.getEmitter();

    plugin.filterPattern = 'component';
    assert.equal(await emitter.shouldRunTestSuite({ testPath: '/workspace/test/service.test.js' }), false);

    plugin.onKey(KEYS.ESCAPE);
    assert.equal(plugin.filterPattern, null);
    assert.equal(await emitter.shouldRunTestSuite({ testPath: '/workspace/test/service.test.js' }), true);
  }

  // 7. Custom watch plugin extending BaseWatchPlugin overrides run to execute config updates and request test rerun
  {
    const mockStdin = {};
    const mockStdout = {};
    const plugin = new CustomWatchPlugin({ stdin: mockStdin, stdout: mockStdout });
    plugin.filterPattern = 'auth';

    let appliedConfig = null;
    const updateConfigAndRun = async (config) => {
      appliedConfig = config;
    };

    const rerun = await plugin.run({}, updateConfigAndRun);
    assert.equal(rerun, true);
    assert.deepEqual(appliedConfig, { testPathPattern: 'auth' });
  }

  console.log('All BaseWatchPlugin contract assertions passed.');
}

run();

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