is_nullish.test.ts

import { assertEquals } from "./deps.ts";
import { isNullish } from "./is_nullish.ts";

// Test isNullish
// * - 0,
// * - ''
// * - NaN
// * - null
// * - undefined
Deno.test("0 is Nullish", () => assertEquals(isNullish(0), true));
Deno.test("NaN is Nullish", () => assertEquals(isNullish(NaN), true));
Deno.test("null is Nullish", () => assertEquals(isNullish(null), true));
Deno.test("undefined is Nullish", () =>
  assertEquals(isNullish(undefined), true));
Deno.test('\"0\" is Not Nullish. It is string', () =>
  assertEquals(isNullish("0"), false));