@babel/types 7.29.8: callExpression

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.callExpression 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.callExpression
Constraints:
  - executionContext: node
Required runtime conditions:
  - ecosystem: npm
  - language: javascript
  - moduleSystem: cjs
  - packageManager: npm@10.9.8
  - runtime: node@22.23.2

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-call-expression",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-babel-types-call-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-call-expression",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "@babel/types": "7.29.8"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify @babel/types.callExpression in pkg:npm/%40babel/types@7.29.8",
  "kind": "HOW",
  "packages": [
    "pkg:npm/%40babel/types@7.29.8"
  ],
  "symbols": [
    "@babel/types.callExpression"
  ],
  "constraints": {
    "executionContext": "node"
  },
  "runtimeConditions": {
    "ecosystem": "npm",
    "language": "javascript",
    "moduleSystem": "cjs",
    "packageManager": "npm@10.9.8",
    "runtime": "node@22.23.2"
  }
}

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

export function createFunctionCall(calleeName, args = []) {
  return t.callExpression(t.identifier(calleeName), args);
}

export function createMethodCall(objectName, methodName, args = []) {
  const callee = t.memberExpression(t.identifier(objectName), t.identifier(methodName));
  return t.callExpression(callee, args);
}

export function createSpreadCall(calleeName, spreadArgName) {
  const callee = t.identifier(calleeName);
  const args = [t.spreadElement(t.identifier(spreadArgName))];
  return t.callExpression(callee, args);
}

export function checkIsCallExpression(node) {
  return t.isCallExpression(node);
}

export function assertCallExpression(node) {
  t.assertCallExpression(node);
}

import assert from "node:assert/strict";
import * as t from "@babel/types";
import {
  createFunctionCall,
  createMethodCall,
  createSpreadCall,
  checkIsCallExpression,
  assertCallExpression
} from "../src/index.mjs";

// Test 1: callExpression constructs a CallExpression AST node with callee and arguments
{
  const arg1 = t.stringLiteral("hello");
  const arg2 = t.numericLiteral(42);
  const callNode = createFunctionCall("greet", [arg1, arg2]);

  assert.equal(callNode.type, "CallExpression");
  assert.equal(callNode.callee.type, "Identifier");
  assert.equal(callNode.callee.name, "greet");
  assert.equal(Array.isArray(callNode.arguments), true);
  assert.equal(callNode.arguments.length, 2);
  assert.equal(callNode.arguments[0].type, "StringLiteral");
  assert.equal(callNode.arguments[0].value, "hello");
  assert.equal(callNode.arguments[1].type, "NumericLiteral");
  assert.equal(callNode.arguments[1].value, 42);
}

// Test 2: callExpression supports MemberExpression callee for method calls
{
  const arg = t.identifier("data");
  const methodCall = createMethodCall("console", "log", [arg]);

  assert.equal(methodCall.type, "CallExpression");
  assert.equal(methodCall.callee.type, "MemberExpression");
  assert.equal(methodCall.callee.object.type, "Identifier");
  assert.equal(methodCall.callee.object.name, "console");
  assert.equal(methodCall.callee.property.type, "Identifier");
  assert.equal(methodCall.callee.property.name, "log");
  assert.equal(methodCall.callee.computed, false);
  assert.equal(methodCall.arguments.length, 1);
  assert.equal(methodCall.arguments[0].name, "data");
}

// Test 3: callExpression supports SpreadElement arguments
{
  const spreadCall = createSpreadCall("sum", "numbers");

  assert.equal(spreadCall.type, "CallExpression");
  assert.equal(spreadCall.callee.type, "Identifier");
  assert.equal(spreadCall.callee.name, "sum");
  assert.equal(spreadCall.arguments.length, 1);
  assert.equal(spreadCall.arguments[0].type, "SpreadElement");
  assert.equal(spreadCall.arguments[0].argument.type, "Identifier");
  assert.equal(spreadCall.arguments[0].argument.name, "numbers");
}

// Test 4: isCallExpression correctly validates CallExpression nodes against other nodes
{
  const validCall = t.callExpression(t.identifier("fn"), []);
  const otherNode = t.identifier("notACall");
  const literalNode = t.numericLiteral(123);

  assert.equal(checkIsCallExpression(validCall), true);
  assert.equal(checkIsCallExpression(otherNode), false);
  assert.equal(checkIsCallExpression(literalNode), false);
  assert.equal(checkIsCallExpression(null), false);
  assert.equal(checkIsCallExpression(undefined), false);
}

// Test 5: assertCallExpression succeeds on valid nodes and throws on invalid nodes
{
  const validCall = t.callExpression(t.identifier("doSomething"), [t.booleanLiteral(true)]);
  const invalidNode = t.memberExpression(t.identifier("a"), t.identifier("b"));

  assert.doesNotThrow(() => {
    assertCallExpression(validCall);
  });

  assert.throws(() => {
    assertCallExpression(invalidNode);
  });

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

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