'},
  {at: 0, expect: 'rotateX(45deg) rotateY(30deg)'},
  {at: 0.25, expect: 'rotateX(45deg) rotateY(40deg)'},
  {at: 0.5, expect: 'rotateX(45deg) rotateY(50deg)'},
  {at: 0.75, expect: 'rotateX(45deg) rotateY(60deg)'},
  {at: 1, expect: 'rotateX(45deg) rotateY(70deg)'},
  {at: 1.5, expect: 'rotateX(45deg) rotateY(90deg)'},
]);

// When testing rotate functions in isolation, the additive and accumulation
// behaviors are functionally identical. This test includes a skew to ensure
// both methods are impleme