 }, [
        {at: -0.3, expect: 'shape(from calc(-4.5% + 6.5px) 2px, curve by calc(-6% + 13px) 13px with -3% 86px, curve by calc(-6% + 39px) 17px with calc(-9% + 26px) 53px / calc(1.5% + 32.5px) 61px)'},
        {at: 0, expect: 'shape(from calc(0% + 5px) 5px, curve by calc(0% + 10px) 10px with 0% 80px, curve by calc(0% + 30px) 20px with calc(0% + 20px) 50px / calc(0% + 25px) 70px)'},
        {at: 0.5, expect: 'shape(from calc(7.5% + 2.5px) 10px, curve by calc(10% + 5px) 5px with 5% 70px, curve by calc(10% 