摩卡测试失败，即使结果正确

Question

I am doing a javascript test and I don't know why this fails because all my tests return the right results.

this is my app.js

module.exports = function (array){
    var firstBigNumber = 0;
  var secondBigNumber = 0;

    if(array.length === 0) return 0;

      for(var index = 0; index < array.length; index++){

        if(parseInt(array[index]) === array[index]){
                if(array[index] > 0){
                if(array[index] > firstBigNumber){
                    secondBigNumber = firstBigNumber;
                    firstBigNumber = array[index];
                }else if (array[index] > secondBigNumber) {
                            secondBigNumber = array[index];
                    }
             } 
         }
         else{
                        secondBigNumber = 0;
                    firstBigNumber = 0;
         }
        }
    return [firstBigNumber,secondBigNumber];
}

An this are my tests

    const assert = require('assert');
const app = require('../app');

describe('App', function() {
  describe('SimpleTest2', function(){
      it('Empty array should return 0', function(){
          var array = [];
          let result = app(array);
          assert.equal(result,0);
      });
      it('Ignore float elements', function(){
        var array = [1.2, 2, 3];
        assert.equal(app(array),[3,2]);
      });
      it('Ignores non-numerical values in array', function(){
        var array = ['hei', 2, 3, 4, false];
        assert.equal(app(array),[4,3]);
      });          

The error that I receive is Assertion Error [ERR_Asertion]. The are some of my errors I am getting:

Answer 1

This is likely happening because [ 3, 2 ] == [ 3, 2 ] = false . (Welcome to javascript)

I think what you are looking for is something similiar to chais array equality. Here's what I found:

try .eql or .deepEql instead of .equal. I was able to get expected results then.

Check out http://www.chaijs.com/api/bdd/#arguments-section - It's chai but a really good reference.