interpolation({
  property: 'shape-outside',
  from: 'unset',
  to: 'circle(40% at 20% 20%)',
});

test_interpolation({
  property: 'shape-outside',
  from: 'circle(100% at 0% 0%)',
  to: 'circle(50% at 25% 25%)',
}, [
  {at: -0.3, expect: 'circle(115% at -7.5% -7.5%)'},
  {at: 0, expect: 'circle(100% at 0% 0%)'},
  {at: 0.3, expect: 'circle(85% at 7.5% 7.5%)'},
  {at: 0.6, expect: 'circle(70% at 15% 15%)'},
  {at: 1, expect: 'circle(50% at 25% 25%)'},
  {at: 1.5, expect: 'circle(25% at 37.5% 37.5%)'}
]);

