5, expect: 'shape(from 20px 20px, hline to 35px, vline to -20px, close)'},
      ]);

      test_interpolation({
        property: 'offset-path',
        from: 'shape(from 5% 5px, curve to 10% 10px with 0% 80px, curve to 30% 20px with 20% 50px / 25% 70px)',
        to: 'path("M 15 15 Q 10 60 20 0 C 30 40 -5 100 20 30")',
      }, [
        {at: -0.3, expect: 'shape(from calc(6.5% - 4.5px) 2px, curve to calc(13% - 6px) 13px with calc(0% - 3px) 86px, curve to calc(39% - 6px) 17px with calc(26% - 9px) 53px / c