post_32

sum.test.ts

import sum from "./sum";
import { describe, expect, it } from "vitest";

describe("#SUM", () => {
  it("should return 0 for empty array", () => {
    expect(sum()).toBe(0);
  });

  it("should return 1 for [1]", () => {
    expect(sum(1)).toBe(1);
  });

  it("should return sum of all numbers", () => {
    expect(sum(1, 2, 3, 4, 5)).toBe(15);
  });
});