ut contain don't compose with underlying contain.
test_composition({
  property: 'offset-path',
  underlying: 'ray(20deg closest-corner contain)',
  addFrom: 'ray(10deg closest-corner)',
  addTo: 'ray(20deg closest-corner)',
}, [
  {at: -0.3, expect: 'ray(7deg closest-corner)'},
  {at: 0, expect: 'ray(10deg closest-corner)'},
  {at: 0.3, expect: 'ray(13deg closest-corner)'},
  {at: 0.6, expect: 'ray(16deg closest-corner)'},
  {at: 1, expect: 'ray(20deg closest-corner)'},
  {at: 1.5, expect: 'ray(25deg close