progress: 0.5 },
                  { currentTime: 3500, progress: 0.5 }
                ]
  },
  {
    description: 'Test bounds point of step-end easing',
    effect:     {
                  delay: 1000,
                  duration: 1000,
                  fill: 'both',
                  easing: 'steps(2, end)'
                },
    conditions: [
                  { currentTime: 0,    progress: 0 },
                  { currentTime: 999,  progress: 0 },
                  { currentTime: 1000, progress: 0 },
