text: import {assert} from 'chai'
  import {getIntersection} from '../src/utilities-data.ts'
  
  describe('utilities - getIntersection', () => {
    it('should produce empty array from empty input', () => {
      const result = getIntersection()
      assert.sameMembers(result, [])
    })
    it('should replicate single array', () => {
      const result = getIntersection([['a', 'b', 'c']])
      assert.sameMembers(result, ['a', 'b', 'c'])
    })
    it('should produce empty array if no intersection', () => {
      const result = getIntersection([['a', 'b', 'c'], ['x', 'y', 'z']])
      assert.sameMembers(result, [])
    })
    it('should produce intersecting members', () => {
      const result = getIntersection([['a', 'b', 'c'], ['b', 'c', 'd']])
      assert.sameMembers(result, ['b', 'c'])
    })
  })
  