@babel/types 7.29.7: stringLiteral

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 @babel/types.stringLiteral in pkg:npm/%40babel/types@7.29.7
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/types@7.29.7
Demonstrate these symbols/APIs:
  - @babel/types.stringLiteral

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.

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{
  "name": "sample-babel-types-string-literal",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-babel-types-string-literal",
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      "license": "MIT-0",
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      }
    },
    "node_modules/@babel/helper-string-parser": {
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      "resolved": "https://registry.npmjs.org/@babel/helper-string-parser/-/helper-string-parser-7.29.7.tgz",
      "integrity": "sha512-Pb5ijPrZ89GDH8223L4UP8i6QApWxs04RbPQJTeWDV0/keR2E36MeKnyr6LYmUUvqRRI+Iv87SuF1W6ErINzYw==",
      "license": "MIT",
      "engines": {
        "node": ">=6.9.0"
      }
    },
    "node_modules/@babel/helper-validator-identifier": {
      "version": "7.29.7",
      "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.29.7.tgz",
      "integrity": "sha512-qehxGkRj55h/ff8EMaJ+cYhyaKlHIxqYDn682wQD7RNp9UujOQsHog2uS0r2vzr4pW+sXf90NeeayjcNaX3fFg==",
      "license": "MIT",
      "engines": {
        "node": ">=6.9.0"
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    },
    "node_modules/@babel/types": {
      "version": "7.29.7",
      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.29.7.tgz",
      "integrity": "sha512-4zBIxpPzowiZpusoFkyGVwakdRJUyuH5PxQ/PrqghfdFWWasvnCdPfQXHrenDai+gyLARulZjZowCOj6fjT4pA==",
      "license": "MIT",
      "dependencies": {
        "@babel/helper-string-parser": "^7.29.7",
        "@babel/helper-validator-identifier": "^7.29.7"
      },
      "engines": {
        "node": ">=6.9.0"
      }
    }
  }
}

{
  "name": "sample-babel-types-string-literal",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "@babel/types": "7.29.7"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify @babel/types.stringLiteral in pkg:npm/%40babel/types@7.29.7",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/types@7.29.7"
  ],
  "symbols": [
    "@babel/types.stringLiteral"
  ]
}

import * as t from "@babel/types";

export function createStringLiteral(value) {
  return t.stringLiteral(value);
}

export function checkIsStringLiteral(node, opts) {
  return t.isStringLiteral(node, opts);
}

export function assertIsStringLiteral(node, opts) {
  t.assertStringLiteral(node, opts);
}

import assert from "node:assert/strict";
import * as t from "@babel/types";
import {
  createStringLiteral,
  checkIsStringLiteral,
  assertIsStringLiteral
} from "../src/index.mjs";

// Test 1: stringLiteral constructs a StringLiteral AST node with the specified string value
{
  const node = createStringLiteral("hello world");
  assert.equal(node.type, "StringLiteral");
  assert.equal(node.value, "hello world");
}

// Test 2: stringLiteral correctly handles empty strings and strings containing special characters or whitespace
{
  const emptyNode = createStringLiteral("");
  assert.equal(emptyNode.type, "StringLiteral");
  assert.equal(emptyNode.value, "");

  const specialNode = createStringLiteral("line1\nline2\t\"quoted\" 'single' 🚀 \u0000");
  assert.equal(specialNode.type, "StringLiteral");
  assert.equal(specialNode.value, "line1\nline2\t\"quoted\" 'single' 🚀 \u0000");
}

// Test 3: isStringLiteral returns true for StringLiteral AST nodes and false for other node types or non-objects
{
  const strNode = createStringLiteral("test");
  const numNode = t.numericLiteral(42);
  const idNode = t.identifier("x");

  assert.equal(checkIsStringLiteral(strNode), true);
  assert.equal(checkIsStringLiteral(numNode), false);
  assert.equal(checkIsStringLiteral(idNode), false);
  assert.equal(checkIsStringLiteral(null), false);
  assert.equal(checkIsStringLiteral(undefined), false);
  assert.equal(checkIsStringLiteral("primitive string"), false);
  assert.equal(checkIsStringLiteral({ type: "Identifier", name: "x" }), false);

  // Match options support
  assert.equal(checkIsStringLiteral(strNode, { value: "test" }), true);
  assert.equal(checkIsStringLiteral(strNode, { value: "other" }), false);
}

// Test 4: assertStringLiteral succeeds on valid StringLiteral nodes and throws on invalid inputs or mismatched node types
{
  const strNode = createStringLiteral("valid");
  const numNode = t.numericLiteral(123);

  assert.doesNotThrow(() => {
    assertIsStringLiteral(strNode);
  });

  assert.doesNotThrow(() => {
    assertIsStringLiteral(strNode, { value: "valid" });
  });

  assert.throws(() => {
    assertIsStringLiteral(numNode);
  });

  assert.throws(() => {
    assertIsStringLiteral(strNode, { value: "mismatch" });
  });

  assert.throws(() => {
    assertIsStringLiteral(null);
  });
}

console.log("All @babel/types.stringLiteral contract tests passed successfully.");