export default function createObject(proto, props) {
  throw new Error('Not implemented');
}

import createObject from './file';

describe('createObject', () => {
  test('sets the prototype and copies props', () => {
    const proto = { greet() { return 'hi'; } };
    const obj = createObject(proto, { name: 'Ada' });
    expect(Object.getPrototypeOf(obj)).toBe(proto);
    expect(obj.name).toBe('Ada');
    expect(obj.greet()).toBe('hi');
  });

  test('supports null prototype', () => {
    const obj = createObject(null);
    expect(Object.getPrototypeOf(obj)).toBe(null);
  });

  test('throws on invalid prototype', () => {
    expect(() => createObject(42, {})).toThrow(TypeError);
  });
});