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x/rambda/intersection.spec.js

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import { intersection } from './intersection'
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 } ])})