import { describe, expect, test } from '@jest/globals'
import { isStrictSubset } from './isStrictSubset.js'

describe('isStrictSubset', () => {
  test('{ 1 } is a strict subset of { 1, 2 }', () => {
    const a = new Set([1])
    const b = new Set([1, 2])
    expect(isStrictSubset(a, b)).toEqual(true)
  })
})