import { describe, expect, it } from '@jest/globals'
import { nOutOf } from './nOutOf.js'

describe('nOutOf', () => {
  it('returns a set of sets, every one with n unique elements out of a set (1)', () => {
    expect(nOutOf(2, new Set([1, 2]))).toEqual(new Set([new Set([1, 2])]))
  })

  it('returns a set of set, every one with n unique elements out of a set (2)', () => {
    expect(nOutOf(2, new Set([1, 2, 3]))).toEqual(new Set([new Set([1, 2]), new Set([1, 3]), new Set([2, 3])]))
  })
})