after.js

function priceFormatter(priceText) {
    "use strict";

    priceText = priceText.replace('.', '').trim();
    priceText = priceText.replace(',', '.').trim();
    const re = /(\D*)(.*)/;
    const result = re.exec(priceText);

    var price = parseFloat(parseFloat(result[2]).toFixed(2));

    return price;
}

const test = require('tape');

test('price formatting test', function (t) {
    t.plan(2);

    t.equal(parseFloat('1357.14'), priceFormatter('1.357,14'));
    t.equal(parseFloat('109.99'), priceFormatter('109,99'));
});

after.test

TAP version 13
# price formatting test
ok 1 should be equal
ok 2 should be equal

1..2
# tests 2
# pass  2

# ok

before.js

function priceFormatter(priceText) {
    "use strict";
    
    priceText = priceText.replace(',', '.').trim();
    const re = /(\D*)(.*)/;
    const result = re.exec(priceText);

    var price = parseFloat(parseFloat(result[2]).toFixed(2));

    return price;
}

const test = require('tape');

test('price formatting test', function (t) {
    t.plan(2);

    t.equal(parseFloat('1357.14'), priceFormatter('1.357,14'));
    t.equal(parseFloat('109.99'), priceFormatter('109,99'));
});

before.test

TAP version 13
# price formatting test
not ok 1 should be equal
  ---
    operator: equal
    expected: 1.36
    actual:   1357.14
    at: Test.<anonymous> (/home/ilya/web/amazon-wish-list2/src/priceFormatter.js:20:7)
  ...
ok 2 should be equal

1..2
# tests 2
# pass  1
# fail  1