This test performs an animation of the left property with four different fill modes. It animates over 0.1 second with a 0.1 second delay. It takes snapshots at document load and the end of the animation. None - from/to present Backwards - from/to present Forwards - from/to present Both - from/to present Both iterating - from/to present None - from missing Backwards - from missing Forwards - from missing Both - from missing Both iterating - from missing PASS - start of animation - id: a expected: 100 actual: 100 PASS - start of animation - id: b expected: 200 actual: 200 PASS - start of animation - id: c expected: 100 actual: 100 PASS - start of animation - id: d expected: 200 actual: 200 PASS - start of animation - id: e expected: 200 actual: 200 PASS - end of animation - id: a expected: 100 actual: 100 PASS - end of animation - id: b expected: 100 actual: 100 PASS - end of animation - id: c expected: 300 actual: 300 PASS - end of animation - id: d expected: 300 actual: 300 PASS - end of animation - id: e expected: 200 actual: 200