@babel/types 7.29.8: binaryExpression

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.binaryExpression in pkg:npm/%40babel/types@7.29.8
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/%40babel/types@7.29.8
Demonstrate these symbols/APIs:
  - @babel/types.binaryExpression

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:sha256:9d9240589ca5ee0a7ecc5986108e1cd303fefa0a27c7146a811da4268a628b02","contract":["binaryExpression constructs an AST node with the specified operator, left, and right expression nodes","binaryExpression supports nested binary expressions as operand subtrees","isBinaryExpression correctly validates binary expression nodes against other AST node types","assertBinaryExpression asserts that an AST node is a binary expression and throws on mismatch"],"goal":"verify @babel/types.binaryExpression in pkg:npm/%40babel/types@7.29.8","kind":"HOW","packages":["pkg:npm/%40babel/types@7.29.8"],"schemaVersion":1,"symbols":["@babel/types.binaryExpression"]},"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/%40babel/types@7.29.8"],"schemaVersion":1,"subject":"pkg:npm/%40babel/types@7.29.8","symbols":["@babel/types.binaryExpression"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-babel-types-binary-expression",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-babel-types-binary-expression",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "@babel/types": "7.29.8"
      }
    },
    "node_modules/@babel/helper-string-parser": {
      "version": "7.29.7",
      "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"
      }
    },
    "node_modules/@babel/types": {
      "version": "7.29.8",
      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.29.8.tgz",
      "integrity": "sha512-Vj1jF3cPfxg7OAfoI7QnVKLoILlm2JF9pnVHrX8qx7AHMiYWT+NDAA7jChlNgRS4WTLc/fD1lXLmPixluj+3Gg==",
      "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-binary-expression",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "@babel/types": "7.29.8"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify @babel/types.binaryExpression in pkg:npm/%40babel/types@7.29.8",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/types@7.29.8"
  ],
  "symbols": [
    "@babel/types.binaryExpression"
  ]
}

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

export function createAddition(leftName, rightValue) {
  return t.binaryExpression("+", t.identifier(leftName), t.numericLiteral(rightValue));
}

export function createComparison(operator, leftName, rightName) {
  return t.binaryExpression(operator, t.identifier(leftName), t.identifier(rightName));
}

export function createNestedExpression(leftA, leftB, rightC) {
  const sum = t.binaryExpression("+", t.numericLiteral(leftA), t.numericLiteral(leftB));
  return t.binaryExpression("*", sum, t.numericLiteral(rightC));
}

export function checkIsBinaryExpression(node) {
  return t.isBinaryExpression(node);
}

import assert from "node:assert/strict";
import * as t from "@babel/types";
import {
  createAddition,
  createComparison,
  createNestedExpression,
  checkIsBinaryExpression
} from "../src/index.mjs";

// Test 1: binaryExpression builds a simple arithmetic BinaryExpression AST node
{
  const node = createAddition("x", 42);
  assert.equal(node.type, "BinaryExpression");
  assert.equal(node.operator, "+");
  assert.equal(node.left.type, "Identifier");
  assert.equal(node.left.name, "x");
  assert.equal(node.right.type, "NumericLiteral");
  assert.equal(node.right.value, 42);
}

// Test 2: binaryExpression builds comparison operations
{
  const node = createComparison("===", "a", "b");
  assert.equal(node.type, "BinaryExpression");
  assert.equal(node.operator, "===");
  assert.equal(node.left.name, "a");
  assert.equal(node.right.name, "b");
}

// Test 3: binaryExpression supports nested binary expressions as operands
{
  const node = createNestedExpression(2, 3, 4);
  assert.equal(node.type, "BinaryExpression");
  assert.equal(node.operator, "*");
  assert.equal(node.left.type, "BinaryExpression");
  assert.equal(node.left.operator, "+");
  assert.equal(node.left.left.value, 2);
  assert.equal(node.left.right.value, 3);
  assert.equal(node.right.value, 4);
}

// Test 4: isBinaryExpression and assertBinaryExpression validate BinaryExpression nodes
{
  const binNode = t.binaryExpression("-", t.identifier("foo"), t.identifier("bar"));
  const numNode = t.numericLiteral(100);

  assert.equal(checkIsBinaryExpression(binNode), true);
  assert.equal(checkIsBinaryExpression(numNode), false);

  assert.doesNotThrow(() => {
    t.assertBinaryExpression(binNode);
  });

  assert.throws(() => {
    t.assertBinaryExpression(numNode);
  });
}

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