shebang-regex 3.0.0: test

audit=false
fund=false
update-notifier=false

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 shebang-regex.test in pkg:npm/shebang-regex@3.0.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/shebang-regex@3.0.0
Demonstrate these symbols/APIs:
  - shebang-regex.test

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:sha256:50f318a094ae5069b437f62b261b3c38224770ddd67c07b47a1dfb9c794ee24c","constraints":{"executionContext":"node"},"contract":["shebangRegex.test returns true for standard binary interpreter shebang lines","shebangRegex.test returns true for env-based interpreter shebang lines","shebangRegex.test returns true for env shebang lines with options and flags","shebangRegex.test returns true for bare shebang lines with no interpreter path","shebangRegex.test returns true for multi-line scripts starting with a valid shebang line","shebangRegex.test returns false for strings that do not start with #!","shebangRegex.test returns false for strings with leading whitespace or newlines before #!","shebangRegex.test returns false for shebang patterns appearing only on subsequent lines","shebangRegex.test returns false for empty strings","shebangRegex.test returns true for direct interpreter shebang lines with arguments"],"goal":"verify shebang-regex.test in pkg:npm/shebang-regex@3.0.0","kind":"HOW","packages":["pkg:npm/shebang-regex@3.0.0"],"schemaVersion":1,"symbols":["shebang-regex.test"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","executionContext":"node","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"esm","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/shebang-regex@3.0.0"],"schemaVersion":1,"subject":"pkg:npm/shebang-regex@3.0.0","symbols":["shebang-regex.test"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-shebang-regex-test",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-shebang-regex-test",
      "version": "1.0.0",
      "dependencies": {
        "shebang-regex": "3.0.0"
      }
    },
    "node_modules/shebang-regex": {
      "version": "3.0.0",
      "resolved": "https://registry.npmjs.org/shebang-regex/-/shebang-regex-3.0.0.tgz",
      "integrity": "sha512-7++dFhtcx3353uBaq8DDR4NuxBetBzC7ZQOhmTQInHEd6bSrXdiEyzCvG07Z44UYdLShWUyXt5M/yhz8ekcb1A==",
      "license": "MIT",
      "engines": {
        "node": ">=8"
      }
    }
  }
}

{
  "name": "sample-shebang-regex-test",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "dependencies": {
    "shebang-regex": "3.0.0"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify shebang-regex.test in pkg:npm/shebang-regex@3.0.0",
  "kind": "HOW",
  "packages": [
    "pkg:npm/shebang-regex@3.0.0"
  ],
  "symbols": [
    "shebang-regex.test"
  ]
}

import assert from 'node:assert/strict';
import shebangRegex from 'shebang-regex';

// 1. shebangRegex.test returns true for standard binary interpreter shebang lines
{
  assert.equal(shebangRegex.test('#!/bin/bash'), true);
  assert.equal(shebangRegex.test('#!/bin/sh'), true);
  assert.equal(shebangRegex.test('#!/usr/bin/perl'), true);
}

// 2. shebangRegex.test returns true for env-based interpreter shebang lines
{
  assert.equal(shebangRegex.test('#!/usr/bin/env node'), true);
  assert.equal(shebangRegex.test('#!/usr/bin/env python3'), true);
}

// 3. shebangRegex.test returns true for env shebang lines with options and flags
{
  assert.equal(shebangRegex.test('#!/usr/bin/env -S node --trace-warnings'), true);
}

// 4. shebangRegex.test returns true for bare shebang lines with no interpreter path
{
  assert.equal(shebangRegex.test('#!'), true);
}

// 5. shebangRegex.test returns true for multi-line scripts starting with a valid shebang line
{
  assert.equal(shebangRegex.test('#!/usr/bin/env node\nconsole.log("hello");'), true);
  assert.equal(shebangRegex.test('#!/bin/bash\necho 1\n'), true);
}

// 6. shebangRegex.test returns false for strings that do not start with #!
{
  assert.equal(shebangRegex.test('console.log("hello");'), false);
  assert.equal(shebangRegex.test('// #!/usr/bin/env node'), false);
  assert.equal(shebangRegex.test('/* #!/bin/sh */'), false);
}

// 7. shebangRegex.test returns false for strings with leading whitespace or newlines before #!
{
  assert.equal(shebangRegex.test(' #!/bin/bash'), false);
  assert.equal(shebangRegex.test('\t#!/bin/bash'), false);
  assert.equal(shebangRegex.test('\n#!/bin/bash'), false);
}

// 8. shebangRegex.test returns false for shebang patterns appearing only on subsequent lines
{
  assert.equal(shebangRegex.test('const x = 1;\n#!/bin/bash'), false);
}

// 9. shebangRegex.test returns false for empty strings
{
  assert.equal(shebangRegex.test(''), false);
}

// 10. shebangRegex.test returns true for direct interpreter shebang lines with arguments
{
  assert.equal(shebangRegex.test('#!/bin/sh -e'), true);
  assert.equal(shebangRegex.test('#!/bin/bash -eux'), true);
}

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