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

describe('cartesianProduct', () => {
  it('returns the cartesian product', () => {
    const a = new Set([1, 2])
    const b = new Set(['a', 'b'])
    const result = cartesianProduct(a, b)
    expect(result).toEqual(
      new Set([
        [1, 'a'],
        [1, 'b'],
        [2, 'a'],
        [2, 'b'],
      ])
    )
  })
})