import { test } from "node:test";
import assert from "node:assert/strict";
import { isPerfectSquare } from "../src/isPerfectSquare.js";

test("isPerfectSquare identifies perfect squares", () => {
  assert.strictEqual(isPerfectSquare(0), true);
  assert.strictEqual(isPerfectSquare(1), true);
  assert.strictEqual(isPerfectSquare(4), true);
  assert.strictEqual(isPerfectSquare(9), true);
  assert.strictEqual(isPerfectSquare(16), true);
  assert.strictEqual(isPerfectSquare(25), true);
  assert.strictEqual(isPerfectSquare(100), true);
});

test("isPerfectSquare rejects non‑perfect squares and invalid inputs", () => {
  assert.strictEqual(isPerfectSquare(-1), false);
  assert.strictEqual(isPerfectSquare(2), false);
  assert.strictEqual(isPerfectSquare(3), false);
  assert.strictEqual(isPerfectSquare(5), false);
  assert.strictEqual(isPerfectSquare(7), false);
  assert.strictEqual(isPerfectSquare(10), false);
  assert.strictEqual(isPerfectSquare(2.5), false);
  assert.strictEqual(isPerfectSquare(NaN), false);
  assert.strictEqual(isPerfectSquare(Infinity), false);
  assert.strictEqual(isPerfectSquare(-Infinity), false);
});