typescript 5.9.3: createSourceFile

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 typescript.createSourceFile in pkg:npm/typescript@5.9.3
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/typescript@5.9.3
Demonstrate these symbols/APIs:
  - typescript.createSourceFile

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:cdf00468216684d0f899280ab4890728690f3b5312d061e3fca71311b3bcb159","contract":["ts.createSourceFile parses TypeScript source text into a SourceFile AST node with SyntaxKind.SourceFile","statements array contains parsed top-level AST nodes (VariableStatement and FunctionDeclaration)","setParentNodes=true binds child statement parent references to the created SourceFile"],"goal":"verify typescript.createSourceFile in pkg:npm/typescript@5.9.3","kind":"HOW","packages":["pkg:npm/typescript@5.9.3"],"schemaVersion":1,"symbols":["typescript.createSourceFile"]},"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/typescript@5.9.3"],"schemaVersion":1,"subject":"pkg:npm/typescript@5.9.3","symbols":["typescript.createSourceFile"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-typescript-create-source-file",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-typescript-create-source-file",
      "version": "1.0.0",
      "dependencies": {
        "typescript": "5.9.3"
      }
    },
    "node_modules/typescript": {
      "version": "5.9.3",
      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
      "license": "Apache-2.0",
      "bin": {
        "tsc": "bin/tsc",
        "tsserver": "bin/tsserver"
      },
      "engines": {
        "node": ">=14.17"
      }
    }
  }
}

{
  "name": "sample-typescript-create-source-file",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "scripts": {
    "test": "node test/contract.mjs"
  },
  "dependencies": {
    "typescript": "5.9.3"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify typescript.createSourceFile in pkg:npm/typescript@5.9.3",
  "kind": "HOW",
  "packages": [
    "pkg:npm/typescript@5.9.3"
  ],
  "symbols": [
    "typescript.createSourceFile"
  ]
}

import ts from 'typescript';

export function parseSourceFile(fileName, sourceText) {
  return ts.createSourceFile(
    fileName,
    sourceText,
    ts.ScriptTarget.Latest,
    true,
    ts.ScriptKind.TS
  );
}

import assert from 'node:assert/strict';
import ts from 'typescript';
import { parseSourceFile } from '../src/index.mjs';

const code = 'export const answer: number = 42;\nfunction greet(name: string): string { return name; }\n';
const sf = parseSourceFile('example.ts', code);

assert.equal(sf.kind, ts.SyntaxKind.SourceFile);
assert.equal(sf.fileName, 'example.ts');
assert.equal(sf.statements.length, 2);
assert.equal(sf.statements[0].kind, ts.SyntaxKind.VariableStatement);
assert.equal(sf.statements[1].kind, ts.SyntaxKind.FunctionDeclaration);
assert.equal(sf.statements[1].parent, sf);