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import { assertEquals } from "../deps.ts";import { ListNode } from "../mod.ts";import isPalindrome from "./index.ts";
Deno.test("palindrome-linked-list-1", () => {    const head = new ListNode(1);    head.next = new ListNode(2);    head.next.next = new ListNode(3);    head.next.next.next = new ListNode(2);    head.next.next.next.next = new ListNode(1);    assertEquals(isPalindrome(head), true);});
Deno.test("palindrome-linked-list-2", () => {    const head = null;
    assertEquals(isPalindrome(head), true);});Deno.test("palindrome-linked-list-3", () => {    const head = new ListNode(1);    head.next = new ListNode(2);
    assertEquals(isPalindrome(head), false);});Deno.test("palindrome-linked-list-4", () => {    const head = new ListNode(1);    head.next = new ListNode(2, new ListNode(2, new ListNode(1)));
    assertEquals(isPalindrome(head), true);});