multiplyByTwo.test.js

import multiplyByTwo from '../multiplyByTwo';

describe('multiplyByTwo', () => {
  it('should multiply numbers by two using bitwise operations', () => {
    expect(multiplyByTwo(0)).toBe(0);
    expect(multiplyByTwo(1)).toBe(2);
    expect(multiplyByTwo(3)).toBe(6);
    expect(multiplyByTwo(10)).toBe(20);
    expect(multiplyByTwo(17)).toBe(34);
    expect(multiplyByTwo(125)).toBe(250);
  });
});