DESAFIO

Tentei resolver o exercício/desafio, o teste passou mas tem um erro no console referente a unique key.

Transacoes.test.js

import React from 'react'
import { render } from '@testing-library/react'
import Transacoes from './Transacoes'

describe('Componente de transações', () => {
    it('Deve renderizar uma lista de transações', () => {
        const transacoes = [
            { data: '16/12/2020', tipo: 'saque', valor: '50,00' },
            { data: '26/11/2020', tipo: 'deposito', valor: '150,00' },
            { data: '10/10/2020', tipo: 'saque', valor: '100,00' }
        ]
        const { container } = render(
            <Transacoes
                transacoes={transacoes}
            />)

        expect(container.firstChild).toMatchSnapshot()
    })
})

Erro

 PASS  src/transacoes/Transacoes.test.js
  Componente de transações
    ✓ Deve renderizar uma lista de transações (7ms)

  console.error node_modules/react-dom/cjs/react-dom.development.js:88
    Warning: Encountered two children with the same key, `undefined-undefined`. Keys should be unique so that components maintain their identity across updates. Non-unique keys may cause children to be duplicated and/or omitted — the behavior is unsupported and could change in a future version.
        in div (at Transacoes.js:7)
        in Transacoes (at Transacoes.test.js:15)

  console.error node_modules/react-dom/cjs/react-dom.development.js:88
    Warning: Encountered two children with the same key, `undefined-undefined`. Keys should be unique so that components maintain their identity across updates. Non-unique keys may cause children to be duplicated and/or omitted — the behavior is unsupported and could change in a future version.
        in div (at Transacoes.js:7)
        in Transacoes (at Transacoes.test.js:15)

Test Suites: 1 passed, 1 total
Tests:       1 passed, 1 total
Snapshots:   1 passed, 1 total
Time:        0.359s, estimated 1s
Ran all test suites related to changed files.

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