export default function shallowClone(value) {
  throw new Error('Not implemented');
}

import shallowClone from './file';

describe('shallowClone', () => {
  test('clones arrays shallowly', () => {
    const arr = [1, { x: 2 }];
    const copy = shallowClone(arr);
    expect(copy).toEqual(arr);
    expect(copy === arr).toBe(false);
    expect(copy[1]).toBe(arr[1]);
  });

  test('clones objects shallowly', () => {
    const obj = { a: 1, b: { c: 2 } };
    const copy = shallowClone(obj);
    expect(copy).toEqual(obj);
    expect(copy === obj).toBe(false);
    expect(copy.b).toBe(obj.b);
  });

  test('throws for non-object/array', () => {
    expect(() => shallowClone(42)).toThrow(TypeError);
    expect(() => shallowClone('x')).toThrow(TypeError);
  });
});