Reading from a CSV File to JSON returns an empty array

So I have this function which prints out json object as strings:

GetAllArticles: (req, res) => {
        var allArticles = getAllArticles();

        res.setHeader("Content-Type", 'application/json');
        res.write(JSON.stringify(allArticles));  //cast object to string

        res.end();
}

Here is my getAllArticles:

function getAllArticles() {
    var result = [];
    result.push(new Article('Gummistiefel', 100, 34.99));
    result.push(new Article('Regenmantel', 10, 124.99));
    result.push(new Article('HTML5 Buch', 25, 4.99));

    //creates a test file
    var json2csv = require('json2csv');
    var fs = require('fs');
    var fields = ["articleName", "quantity","price"];

    var csv2 = json2csv({ data: result, fields: fields });

    fs.writeFile('file.csv', csv2, function (err) {
        if (err) throw err;
        console.log('file saved');
    });

    result = [];//clear the array to save new articles

    //load file
    const csvFilePath = 'file.csv'
    const csv = require('csvtojson')
    csv()
        .fromFile(csvFilePath)
        .on('json', (jsonObj) => { 

            result.push(jsonObj);
        })
        .on('done', (error) => {
             console.log('end');
        })



    return result;
}

Article:

function Article(articleName, quantity, price) {
    this.articleName = articleName;
    this.quantity = quantity;
    this.price = price;
}

And the output on the webpage is: [] So I checked if the loaded jsonObject were in the array and they were, but after I convert them to string the output is just "[]"..

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