text: import Calculator from './calculator.js';
  import { expect } from 'chai';
  
  const calculator = new Calculator();
  
  describe('Calculator Tests', () => {
  
    describe('Add operation test', () => {
      it('should return 4 for 2 + 2', () => {
        expect(Boolean(calculator.add(2, 2))).to.equal(true);
      });
    });
  
  });