refact4.js

test('setWith() takes a path and a function', async function ({ deepEqual, end }) {
  const payload = {
    event: {
      body: '{"a": 1, "foo": "bar"}'
    }
  }
  const result = setWith('event.body', JSON.parse)(deepFreeze(payload))
  const actual = result.event.body
  const expected = { a: 1, foo: 'bar' }
  deepEqual(actual, expected, 'applies JSON.parse to the value assigned to that path')
  end()
})