, arc by calc(-7.5% + 37.5px) -20px of 15px 15px cw rotate 390deg, arc to calc(-12.5% + 37.5px) 20px of 10px 5px)'},
      ]);

      test_interpolation({
        property: 'offset-path',
        from: 'path("M 5 5 A 10,20 0 0,0 15,-15 a 30,30 30 1,1 15,-5 A 10,5 0 0,0 25 20")',
        to: 'shape(from 15px 15px, arc to 5px -25px of 20px 30px, arc by 25px -15px of 20px 20px cw rotate 270deg small, arc to 25px 20px of 10px 5px small cw)'
      }, [
        {at: -0.3, expect: 'shape(from 2px 2px, arc to 18px 