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import { intersection as intersectionRamda } from 'ramda'
import { intersection } from './intersection.js'
test('intersection', () => {  const list1 = [ 1, 2, 3, 4 ]  const list2 = [ 3, 4, 5, 6 ]  expect(intersection(list1)(list2)).toEqual([ 3, 4 ])
  expect(intersection([], [])).toEqual([])})
test('intersection with objects', () => {  const list1 = [ { id : 1 }, { id : 2 }, { id : 3 }, { id : 4 } ]  const list2 = [ { id : 3 }, { id : 4 }, { id : 5 }, { id : 6 } ]  expect(intersection(list1)(list2)).toEqual([ { id : 3 }, { id : 4 } ])})
test('order is the same as in Ramda', () => {  const list = [ 'a', 'b', 'c', 'd' ]
  expect(intersectionRamda(list, [ 'b', 'c' ])).toEqual([ 'b', 'c' ])  expect(intersection(list, [ 'b', 'c' ])).toEqual([ 'b', 'c' ])
  expect(intersection(list, [ 'c', 'b' ])).toEqual([ 'c', 'b' ])  expect(intersectionRamda(list, [ 'c', 'b' ])).toEqual([ 'c', 'b' ])})