This test performs an animation of the left property. It animates over 1 second. It takes 3 snapshots and expects each result to be within a specified range.
PASS - "left" property for "box" element at 0.25s saw something close to: 125
PASS - "left" property for "box" element at 0.5s saw something close to: 150
PASS - "left" property for "box" element at 0.75s saw something close to: 175