[HAI] week3 two pointer palindrome

https://leetcode.com/problems/valid-palindrome/description/

lib/isPalindrome/isPalindrome.test.ts

@@ -0,0 +1,20 @@
+import { describe, it, expect } from "vitest";
+import { isPalindrome } from "./isPalindrome.ts";
+
+describe("isPalindrome", () => {
+  it("A man, a plan, a canal: Panama => true", () => {
+    expect(isPalindrome("A man, a plan, a canal: Panama")).toBeTruthy();
+  });
+
+  it("race a car => false", () => {
+    expect(isPalindrome("race a car")).toBeFalsy();
+  });
+
+  it(" _ => true", () => {
+    expect(isPalindrome(" ")).toBeTruthy();
+  });
+
+  it(" 0P => false", () => {
+    expect(isPalindrome("0P")).toBeFalsy();
+  });
+});