text: 'use strict';
  
  const Calc = require('./../Calc');
  const chai = require('chai');
  const expect = chai.expect;
  
  describe('name of file - Calc', ( ) => {
      it('description of the test - sum should return 4', (done) => {
          let resultSum = Calc.sum( 2, 2 );
          expect( resultSum ).to.be.equal( 4 );
          done();
      });
  
      it('sub should return 9', (done) => {
          let resultSub = Calc.sub( 10, 1 );
          expect( resultSub ).to.be.equal( 9 );
          done();
      });
  
      it('mult should return 10', (done) => {
          let resultMult = Calc.mult( 2, 5 );
          expect( resultMult ).to.be.equal( 10 );
          done();
      });
  
      it('div should return 10', (done) => {
          let resultDiv = Calc.div( 20, 2 );
          expect( resultDiv ).to.be.equal( 10 );
          done();
      });
  });