const { fibo } = require("./fibo");

describe("basic value", () => {
    test("fibo of 0", () => {
        expect(fibo(0)).toBe(0);
    });
    test("fibo of 1", () => {
        expect(fibo(1)).toBe(1);
    });
    test("fibo of 2", () => {
        expect(fibo(2)).toBe(1);
    });
    test("fibo of 4", () => {
        expect(fibo(4)).toBe(3);
    });
    test("fibo of 19", () => {
        expect(fibo(19)).toBe(4181);
    });
});

describe("errors", () => {
    test("fibo of -1", () => {
        expect(fibo(-1)).toBe(-1);
    });
    test("fibo of null", () => {
        expect(fibo(null)).toBe(-1);
    });
    test("fibo of undefined", () => {
        expect(fibo(undefined)).toBe(-1);
    });
    test("fibo of a string", () => {
        expect(fibo("uwu adrien")).toBe(-1);
    });
    test("fibo of NaN", () => {
        expect(fibo(NaN)).toBe(-1);
    });
});