nted; accumulate should combine the rotate before
// the skew.
test_composition({
  property: 'transform',
  underlying: 'rotate(45deg) skew(10deg, 20deg)',
  accumulateFrom: 'rotate(45deg)',
  accumulateTo: 'rotate(225deg)',
}, [
  {at: -0.5, expect: 'rotate(0deg) skew(10deg, 20deg)'},
  {at: 0, expect: 'rotate(90deg) skew(10deg, 20deg)'},
  {at: 0.25, expect: 'rotate(135deg) skew(10deg, 20deg)'},
  {at: 0.5, expect: 'rotate(180deg) skew(10deg, 20deg)'},
  {at: 0.75, expect: 'rotate(225deg) skew(10deg, 20d