text: const R = require('../../rambda')
  
  test('', () => {
    expect(R.reverse([ 1, 2, 3 ])).toEqual([ 3, 2, 1 ])
  })
  
  test('it doesn\'t mutate', () => {
    const arr = [ 1, 2, 3 ]
  
    expect(R.reverse(arr)).toEqual([ 3, 2, 1 ])
  
    expect(arr).toEqual([ 1, 2, 3 ])
  })
  