import { DoublyLinkedList } from './doubly-linked-list'

describe('Double linked list', () => {
  it('should create a new list', () => {
    const arr = [1, 2, 3, 4, 5]
    const dll = new DoublyLinkedList<number>(arr)

    expect(dll).toBeDefined()
    expect(dll.size).toBeDefined()
    expect(dll.head?.prev()).toBeNull()
    expect(dll.head?.next()).toBeDefined()
    expect(dll.tail?.next()).toBeNull()
    expect(dll.tail?.prev()).toBeDefined()

    expect(dll.toArray()).toEqual(arr)
  })
})