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import { union } from './union.js'
test('happy', () => {  expect(union([ 1, 2 ], [ 2, 3 ])).toEqual([ 1, 2, 3 ])})
test('with list of objects', () => {  const list1 = [ { a : 1 }, { a : 2 } ]  const list2 = [ { a : 2 }, { a : 3 } ]  const result = union(list1)(list2)})