example-test.jsx

import {render as rtlRender} from 'react-testing-library'

function render ({foo = 'defaultFoo', doSomething = jest.fn()} = {}) {
  const result = rtlRender(<MyComponent foo={foo} doSomething={doSomething} />)
  return {
    ...result,
    doSomething,
    clickButton: () => fireEvent.click(result.querySelector('button'))
  }
}

describe('MyComponent', () => {
  test('something', () => {
    const {getByTestId, doSomething, clickButton} = render()
    // ...
  })
  test('something else', () => {
    const {getByTestId, doSomething, clickButton} = render({foo: 'customFoo'})
    // ...
  })
})