test("basic functionality", () => { expect(Math.log).toHaveLength(1); expect(Math.log(-1)).toBe(NaN); expect(Math.log(0)).toBe(-Infinity); expect(Math.log(1)).toBe(0); expect(Math.log(10)).toBeCloseTo(2.302585092994046); expect(Math.log(NaN)).toBe(NaN); expect(Math.log(Number.POSITIVE_INFINITY)).toBe(Number.POSITIVE_INFINITY); expect(Math.log(-0.0)).toBe(Number.NEGATIVE_INFINITY); });