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André Peixoto
André Peixoto

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Validating String in Jest

#webdev #javascript #programming #tutorial

Hi commiters!

Perhaps you have encountered a problem with validating strings in Jest.

test fail



For example, the test above validates that the function receives a value and returns a rounded value.

it('It should properly format a unit value with rounding.', () => { expect(formatCurrency(1234.56, true, false)).toEqual({ measure: 'thousand', value: 'R$ 1.200,00', }); });
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In this test, Jest returned an error, highlighting the differences between the expected and received values, but they are the same 🤯

- Expected - 1 + Received + 1 Object { "measure": "thousand", - "value": "R$ 1.200,00", + "value": "R$ 1.200,00",
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The solution is to add \xa0. The problem is not with your string, but how Jest compares string values 🤡

The corrected code is shown above.

it('It should properly format a unit value with rounding.', () => { expect(formatCurrency(1234.56, true, false)).toEqual({ measure: 'thousand', value: 'R$\xa01.200,00', // remove space and add \xa0 }); });
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