',
  from: '100%',
  to: '0%',
}, [
  {at: 0, expect: '100%'},
  {at: 0.3, expect: '70%'},
  {at: 0.6, expect: '40%'},
  {at: 1, expect: '0%'},
]);

test_interpolation({
  property: 'text-decoration-thickness',
  from: '100%',
  to: '200%',
}, [
  {at: 0, expect: '100%'},
  {at: 0.3, expect: '130%'},
  {at: 0.6, expect: '160%'},
  {at: 1, expect: '200%'},
]);

test_interpolation({
  property: 'text-decoration-thickness',
  from: '16px',
  to: '0em',
}, [
  {at: 0, expect: '16px'},
  {at: 0.3, expect: '11.2p