text: const assert = require('chai').assert;
  const mathEnforcer = require('./04.MathEnforcer');
  
  describe('mathEnforcer', function () {
      it('addFive should return 10', function () {
          let number = 5;
  
          let result = mathEnforcer.addFive(number);
  
          assert.equal(result, 10);
      });
  
      it('addFive should return 10.5', function () {
          let number = 5.5;
  
          let result = mathEnforcer.addFive(number);
  
          assert.equal(result, 10.5);
      });
  
      it('addFive should return 4', function(){
          let number = -1;
  
          let result = mathEnforcer.addFive(number);
  
          assert.equal(result, 4);
      });
  
      it('addFive should return undefined', function(){
          let number = 'test';
  
          let result = mathEnforcer.addFive(number);
  
          assert.isUndefined(result);
      });
  
      it('subtractTen should return 10', function () {
          let number = 20;
  
          let result = mathEnforcer.subtractTen(number);
  
          assert.equal(result, 10);
      });
  
      it('subtractTen should return 10', function () {
          let number = -20;
  
          let result = mathEnforcer.subtractTen(number);
  
          assert.equal(result, -30);
      });
  
      it('subtractTen should return 2.5', function () {
          let number = 12.5;
  
          let result = mathEnforcer.subtractTen(number);
  
          assert.equal(result, 2.5);
      });
  
      it('subtractTen should return undefined', function(){
          let number = 'test';
  
          let result = mathEnforcer.subtractTen(number);
  
          assert.isUndefined(result);
      });
  
      it('sum should return 30', function () {
          let num1 = 10;
          let num2 = 20;
  
          let result = mathEnforcer.sum(num1, num2);
  
          assert.equal(result, 30);
      });
  
      it('sum should return 20.3', function () {
          let num1 = 10.1;
          let num2 = 10.2;
  
          let result = mathEnforcer.sum(num1, num2);
  
          assert.equal(result, 20.3);
      });
  
      it('sum should return 20.1', function () {
          let num1 = 10.1;
          let num2 = 10;
  
          let result = mathEnforcer.sum(num1, num2);
  
          assert.equal(result, 20.1);
      });
  
      it('sum should return 20.2', function () {
          let num1 = 10;
          let num2 = 10.2;
  
          let result = mathEnforcer.sum(num1, num2);
  
          assert.equal(result, 20.2);
      });
  
      it('sum should return undefined', function () {
          let num1 = 'test';
          let num2 = 20;
  
          let result = mathEnforcer.sum(num1, num2);
  
          assert.isUndefined(result);
      });
  
      it('sum should return undefined', function () {
          let num1 = 10;
          let num2 = 'test';
  
          let result = mathEnforcer.sum(num1, num2);
  
          assert.isUndefined(result);
      });
  
      it('sum should return undefined', function () {
          let num1 = 'test';
          let num2 = 'test';
  
          let result = mathEnforcer.sum(num1, num2);
  
          assert.isUndefined(result);
      });
  });