ty: 'offset-path',
        from: 'shape(from 5px 5px, hline to 5px, vline to -5px, close)',
        to: 'path("M 15 15 H 25 V -15 Z")',
      }, [
        {at: -0.3, expect: 'shape(from 2px 2px, hline to -1px, vline to -2px, close)'},
        {at: 0, expect: 'shape(from 5px 5px, hline to 5px, vline to -5px, close)'},
        {at: 0.5, expect: 'shape(from 10px 10px, hline to 15px, vline to -10px, close)'},
        {at: 1, expect: 'shape(from 15px 15px, hline to 25px, vline to -15px, close)'},
        {at: 1.