import { sum } from "../helpers/sum";

describe("the sum function", () => {

    test("two plus two is four", () => {
        expect(sum([2, 2])).toBe(4);
    });

    test("minus eight plus four is minus four", () => {
        expect(sum([-8, 4])).toBe(-4);
    });

    test("two plus two plus minus four is zero", () => {
        expect(sum([2, 2, -4])).toBe(0);
    });

});
