import { isVector } from "."; describe("Vector", () => { test("isVector", () => { expect(isVector([5, 5])).toBe(true); expect(isVector([-5, -5])).toBe(true); expect(isVector([5, 0.5])).toBe(true); expect(isVector(null)).toBe(false); expect(isVector(undefined)).toBe(false); expect(isVector([5, NaN])).toBe(false); }); });