How to tell Jest that spaces are in fact, spaces?

Question

Given the code:

import { getLocale } from './locale';

export const euro = (priceData: number): string => {
  const priceFormatter = new Intl.NumberFormat(getLocale(), {
    style: 'currency',
    currency: 'EUR',
  });

  return priceFormatter.format(priceData);
}

export default null;

and the related test:

import { euro } from './currency';

test('euro', () => {
  expect(euro(42)).toBe("42,00 €");
});

Jest says:

Even if I copy-paste the expected result of Jest to my assert, the error is still the same.

So the question is: Why the hell? :-D

Answer 1

You want this test to assert:

"42,00\xa0€"

---

It's not a space (different ascii code / unicode). According to a jest issue about string comparison being incorrect Intl.NumberFormat uses a non-breaking space.

And as pointed out in a similar question's answer:

NumberFormat use small non-breaking space (\u202f) for thousand separator and normal non-breaking space beforece currency (\xa0).