bare-stream 2.13.3: isReadable

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 bare-stream.isReadable in pkg:npm/bare-stream@2.13.3
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/bare-stream@2.13.3
Demonstrate these symbols/APIs:
  - bare-stream.isReadable

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.

{"case":{"caseId":"case:sha256:1169d82e51df2ff8861f6b510034e10e94fae100a166519a77797fd458ab3dc0","contract":["isReadable returns true for newly created Readable streams","isReadable returns falsy for Writable stream without readable side","isReadable returns true for Duplex, Transform, and PassThrough streams before completion","isReadable returns false for Readable streams after all data has been consumed and stream has ended","isReadable returns false for destroyed Readable streams","isReadable returns true for paused Readable streams before end","isReadable returns true during active streaming and false on end event"],"goal":"verify bare-stream.isReadable in pkg:npm/bare-stream@2.13.3","kind":"HOW","packages":["pkg:npm/bare-stream@2.13.3"],"schemaVersion":1,"symbols":["bare-stream.isReadable"]},"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/bare-stream@2.13.3"],"schemaVersion":1,"subject":"pkg:npm/bare-stream@2.13.3","symbols":["bare-stream.isReadable"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-bare-stream-is-readable",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-bare-stream-is-readable",
      "version": "1.0.0",
      "dependencies": {
        "bare-stream": "2.13.3"
      }
    },
    "node_modules/b4a": {
      "version": "1.8.1",
      "resolved": "https://registry.npmjs.org/b4a/-/b4a-1.8.1.tgz",
      "integrity": "sha512-aiqre1Nr0B/6DgE2N5vwTc+2/oQZ4Wh1t4NznYY4E00y8LCt6NqdRv81so00oo27D8MVKTpUa/MwUUtBLXCoDw==",
      "license": "Apache-2.0",
      "peerDependencies": {
        "react-native-b4a": "*"
      },
      "peerDependenciesMeta": {
        "react-native-b4a": {
          "optional": true
        }
      }
    },
    "node_modules/bare-events": {
      "version": "2.9.2",
      "resolved": "https://registry.npmjs.org/bare-events/-/bare-events-2.9.2.tgz",
      "integrity": "sha512-AIPKioV7/Y/8KfZ3AAhjPJxLLbY49S64Ym5DakZlUg75qQiTgUq9hEJoEwa4eUezPUlXRy/i5NpsKvo9jgKmoA==",
      "license": "Apache-2.0",
      "peerDependencies": {
        "bare-abort-controller": "*"
      },
      "peerDependenciesMeta": {
        "bare-abort-controller": {
          "optional": true
        }
      }
    },
    "node_modules/bare-stream": {
      "version": "2.13.3",
      "resolved": "https://registry.npmjs.org/bare-stream/-/bare-stream-2.13.3.tgz",
      "integrity": "sha512-Kc+brLqvEqGkjyfiwJmImAOqLZL7OsoLKuavx+hJjgVV3nLTOjloJyPMFxjUPerGGHrNH0fLU06jjykMLWrERQ==",
      "license": "Apache-2.0",
      "dependencies": {
        "b4a": "^1.8.1",
        "streamx": "^2.25.0",
        "teex": "^1.0.1"
      },
      "peerDependencies": {
        "bare-abort-controller": "*",
        "bare-buffer": "*",
        "bare-events": "*"
      },
      "peerDependenciesMeta": {
        "bare-abort-controller": {
          "optional": true
        },
        "bare-buffer": {
          "optional": true
        },
        "bare-events": {
          "optional": true
        }
      }
    },
    "node_modules/events-universal": {
      "version": "1.0.1",
      "resolved": "https://registry.npmjs.org/events-universal/-/events-universal-1.0.1.tgz",
      "integrity": "sha512-LUd5euvbMLpwOF8m6ivPCbhQeSiYVNb8Vs0fQ8QjXo0JTkEHpz8pxdQf0gStltaPpw0Cca8b39KxvK9cfKRiAw==",
      "license": "Apache-2.0",
      "dependencies": {
        "bare-events": "^2.7.0"
      }
    },
    "node_modules/fast-fifo": {
      "version": "1.3.2",
      "resolved": "https://registry.npmjs.org/fast-fifo/-/fast-fifo-1.3.2.tgz",
      "integrity": "sha512-/d9sfos4yxzpwkDkuN7k2SqFKtYNmCTzgfEpz82x34IM9/zc8KGxQoXg1liNC/izpRM/MBdt44Nmx41ZWqk+FQ==",
      "license": "MIT"
    },
    "node_modules/streamx": {
      "version": "2.28.1",
      "resolved": "https://registry.npmjs.org/streamx/-/streamx-2.28.1.tgz",
      "integrity": "sha512-zEzXb0s5Cds7tqMH6rhZ05lcJydCWiQPEwiNngVqzsxCc962vLY4Uw+mW7od8kDH258k2Uz/JrOkdIAAhSh9VA==",
      "license": "MIT",
      "dependencies": {
        "events-universal": "^1.0.0",
        "fast-fifo": "^1.3.2",
        "text-decoder": "^1.1.0"
      }
    },
    "node_modules/teex": {
      "version": "1.0.1",
      "resolved": "https://registry.npmjs.org/teex/-/teex-1.0.1.tgz",
      "integrity": "sha512-eYE6iEI62Ni1H8oIa7KlDU6uQBtqr4Eajni3wX7rpfXD8ysFx8z0+dri+KWEPWpBsxXfxu58x/0jvTVT1ekOSg==",
      "license": "MIT",
      "dependencies": {
        "streamx": "^2.12.5"
      }
    },
    "node_modules/text-decoder": {
      "version": "1.2.7",
      "resolved": "https://registry.npmjs.org/text-decoder/-/text-decoder-1.2.7.tgz",
      "integrity": "sha512-vlLytXkeP4xvEq2otHeJfSQIRyWxo/oZGEbXrtEEF9Hnmrdly59sUbzZ/QgyWuLYHctCHxFF4tRQZNQ9k60ExQ==",
      "license": "Apache-2.0",
      "dependencies": {
        "b4a": "^1.6.4"
      }
    }
  }
}

{
  "name": "sample-bare-stream-is-readable",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "dependencies": {
    "bare-stream": "2.13.3"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify bare-stream.isReadable in pkg:npm/bare-stream@2.13.3",
  "kind": "HOW",
  "packages": [
    "pkg:npm/bare-stream@2.13.3"
  ],
  "symbols": [
    "bare-stream.isReadable"
  ]
}

import assert from 'node:assert/strict';
import {
  Readable,
  Writable,
  Duplex,
  Transform,
  PassThrough,
  isReadable,
  isEnded,
  isStream
} from 'bare-stream';

// 1. isReadable returns true for newly created Readable streams
{
  const readable = new Readable();
  assert.equal(isStream(readable), true);
  assert.equal(isReadable(readable), true);
}

// 2. isReadable returns falsy for Writable stream without readable side
{
  const writable = new Writable({
    write(chunk, cb) {
      cb();
    }
  });
  assert.equal(isStream(writable), true);
  assert.equal(Boolean(isReadable(writable)), false);
}

// 3. isReadable returns true for Duplex, Transform, and PassThrough streams before completion
{
  const duplex = new Duplex();
  const transform = new Transform();
  const passThrough = new PassThrough();

  assert.equal(isReadable(duplex), true);
  assert.equal(isReadable(transform), true);
  assert.equal(isReadable(passThrough), true);
}

// 4. isReadable returns false for Readable streams after all data has been consumed and stream has ended
{
  const readable = Readable.from(['chunkA', 'chunkB']);
  assert.equal(isReadable(readable), true);
  assert.equal(isEnded(readable), false);

  const chunks = [];
  for await (const chunk of readable) {
    chunks.push(chunk.toString());
  }

  assert.deepEqual(chunks, ['chunkA', 'chunkB']);
  assert.equal(isEnded(readable), true);
  assert.equal(Boolean(isReadable(readable)), false);
}

// 5. isReadable returns false for destroyed Readable streams
{
  const readable = new Readable({
    read() {
      this.push('data');
    }
  });
  assert.equal(isReadable(readable), true);

  readable.destroy();
  assert.equal(Boolean(isReadable(readable)), false);
}

// 6. isReadable returns true for paused Readable streams before end
{
  const readable = new Readable({
    read() {
      this.push('paused-data');
    }
  });
  readable.pause();
  assert.equal(isReadable(readable), true);
}

// 7. isReadable returns true during active streaming and false on end event
await new Promise((resolve, reject) => {
  const readable = new Readable({
    read() {
      this.push('hello');
      this.push(null);
    }
  });

  let verifiedDuringData = false;
  readable.on('data', () => {
    try {
      assert.equal(isReadable(readable), true);
      verifiedDuringData = true;
    } catch (err) {
      reject(err);
    }
  });

  readable.on('end', () => {
    try {
      assert.equal(verifiedDuringData, true);
      assert.equal(Boolean(isReadable(readable)), false);
      resolve();
    } catch (err) {
      reject(err);
    }
  });

  readable.on('error', reject);
});