 to: '200%',
}, [
  {at: 0, expect: 'calc(0% + 16px)'},
  {at: 0.3, expect: 'calc(60% + 11.2px)'},
  {at: 0.6, expect: 'calc(120% + 6.4px)'},
  {at: 1, expect: '200%'},
]);

test_interpolation({
  property: 'text-decoration-thickness',
  from: '100%',
  to: '0px',
}, [
  {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: '32px',
}, [
  {at: 0, expect: '100%'},
  {at