PASS: -webkit-background-size from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] was [40px 40px, 80px 80px, 0px 80px, 40px 40px] at 1
PASS: -webkit-background-size from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] was [50px 50px, 80px 100px, 0px 100px, 30px 50px] at 1.25
-Web Animations API:
-FAIL: webkitBackgroundSize from [0px 0px, 0px 0px, contain, cover] to [40px 40px, 40px 40px, contain, cover] was [auto, auto, auto, auto] at -0.25, expected [ 0px 0px, 0px 0px, contain, cover] (parsed as [0px 0px, 0px 0px, contain, cover])
-FAIL: webkitBackgroundSize from [0px 0px, 0px 0px, contain, cover] to [40px 40px, 40px 40px, contain, cover] was [auto, auto, auto, auto] at 0, expected [ 0px 0px, 0px 0px, contain, cover] (parsed as [0px 0px, 0px 0px, contain, cover])
-FAIL: webkitBackgroundSize from [0px 0px, 0px 0px, contain, cover] to [40px 40px, 40px 40px, contain, cover] was [auto, auto, auto, auto] at 0.25, expected [ 0px 0px, 0px 0px, contain, cover] (parsed as [0px 0px, 0px 0px, contain, cover])
-FAIL: webkitBackgroundSize from [0px 0px, 0px 0px, contain, cover] to [40px 40px, 40px 40px, contain, cover] was [auto, auto, auto, auto] at 0.5, expected [40px 40px, 40px 40px, contain, cover]
-FAIL: webkitBackgroundSize from [0px 0px, 0px 0px, contain, cover] to [40px 40px, 40px 40px, contain, cover] was [auto, auto, auto, auto] at 0.75, expected [40px 40px, 40px 40px, contain, cover]
-FAIL: webkitBackgroundSize from [0px 0px, 0px 0px, contain, cover] to [40px 40px, 40px 40px, contain, cover] was [auto, auto, auto, auto] at 1, expected [40px 40px, 40px 40px, contain, cover]
-FAIL: webkitBackgroundSize from [0px 0px, 0px 0px, contain, cover] to [40px 40px, 40px 40px, contain, cover] was [auto, auto, auto, auto] at 1.25, expected [40px 40px, 40px 40px, contain, cover]
-FAIL: webkitBackgroundSize from [0px 0px, 0px 0px, contain, cover] to [40px 40px, 40px 40px, cover, contain] was [auto, auto, auto, auto] at -0.25, expected [ 0px 0px, 0px 0px, contain, cover] (parsed as [0px 0px, 0px 0px, contain, cover])
-FAIL: webkitBackgroundSize from [0px 0px, 0px 0px, contain, cover] to [40px 40px, 40px 40px, cover, contain] was [auto, auto, auto, auto] at 0, expected [ 0px 0px, 0px 0px, contain, cover] (parsed as [0px 0px, 0px 0px, contain, cover])
-FAIL: webkitBackgroundSize from [0px 0px, 0px 0px, contain, cover] to [40px 40px, 40px 40px, cover, contain] was [auto, auto, auto, auto] at 0.25, expected [ 0px 0px, 0px 0px, contain, cover] (parsed as [0px 0px, 0px 0px, contain, cover])
-FAIL: webkitBackgroundSize from [0px 0px, 0px 0px, contain, cover] to [40px 40px, 40px 40px, cover, contain] was [auto, auto, auto, auto] at 0.5, expected [40px 40px, 40px 40px, cover, contain]
-FAIL: webkitBackgroundSize from [0px 0px, 0px 0px, contain, cover] to [40px 40px, 40px 40px, cover, contain] was [auto, auto, auto, auto] at 0.75, expected [40px 40px, 40px 40px, cover, contain]
-FAIL: webkitBackgroundSize from [0px 0px, 0px 0px, contain, cover] to [40px 40px, 40px 40px, cover, contain] was [auto, auto, auto, auto] at 1, expected [40px 40px, 40px 40px, cover, contain]
-FAIL: webkitBackgroundSize from [0px 0px, 0px 0px, contain, cover] to [40px 40px, 40px 40px, cover, contain] was [auto, auto, auto, auto] at 1.25, expected [40px 40px, 40px 40px, cover, contain]
-FAIL: webkitBackgroundSize from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [20px 20px, 40px 40px, 60px 60px, 100px 100px] was [auto, auto, auto, auto] at -0.25, expected [ 0px 0px, 0px 0px, 0px 0px, 0px 0px] (parsed as [0px 0px, 0px 0px, 0px 0px, 0px 0px])
-FAIL: webkitBackgroundSize from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [20px 20px, 40px 40px, 60px 60px, 100px 100px] was [auto, auto, auto, auto] at 0, expected [ 0px 0px, 0px 0px, 0px 0px, 0px 0px] (parsed as [0px 0px, 0px 0px, 0px 0px, 0px 0px])
-FAIL: webkitBackgroundSize from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [20px 20px, 40px 40px, 60px 60px, 100px 100px] was [auto, auto, auto, auto] at 0.25, expected [ 5px 5px, 10px 10px, 15px 15px, 25px 25px] (parsed as [5px 5px, 10px 10px, 15px 15px, 25px 25px])
-FAIL: webkitBackgroundSize from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [20px 20px, 40px 40px, 60px 60px, 100px 100px] was [auto, auto, auto, auto] at 0.5, expected [10px 10px, 20px 20px, 30px 30px, 50px 50px] (parsed as [10px 10px, 20px 20px, 30px 30px, 50px 50px])
-FAIL: webkitBackgroundSize from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [20px 20px, 40px 40px, 60px 60px, 100px 100px] was [auto, auto, auto, auto] at 0.75, expected [15px 15px, 30px 30px, 45px 45px, 75px 75px] (parsed as [15px 15px, 30px 30px, 45px 45px, 75px 75px])
-FAIL: webkitBackgroundSize from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [20px 20px, 40px 40px, 60px 60px, 100px 100px] was [auto, auto, auto, auto] at 1, expected [20px 20px, 40px 40px, 60px 60px, 100px 100px]
-FAIL: webkitBackgroundSize from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [20px 20px, 40px 40px, 60px 60px, 100px 100px] was [auto, auto, auto, auto] at 1.25, expected [25px 25px, 50px 50px, 75px 75px, 125px 125px]
-FAIL: webkitBackgroundSize from [0px 0px] to [80px 80px] was [auto, auto, auto, auto] at -0.25, expected [ 0px 0px, 0px 0px, 0px 0px, 0px 0px] (parsed as [0px 0px, 0px 0px, 0px 0px, 0px 0px])
-FAIL: webkitBackgroundSize from [0px 0px] to [80px 80px] was [auto, auto, auto, auto] at 0, expected [ 0px 0px, 0px 0px, 0px 0px, 0px 0px] (parsed as [0px 0px, 0px 0px, 0px 0px, 0px 0px])
-FAIL: webkitBackgroundSize from [0px 0px] to [80px 80px] was [auto, auto, auto, auto] at 0.25, expected [ 20px 20px, 20px 20px, 20px 20px, 20px 20px] (parsed as [20px 20px, 20px 20px, 20px 20px, 20px 20px])
-FAIL: webkitBackgroundSize from [0px 0px] to [80px 80px] was [auto, auto, auto, auto] at 0.5, expected [ 40px 40px, 40px 40px, 40px 40px, 40px 40px] (parsed as [40px 40px, 40px 40px, 40px 40px, 40px 40px])
-FAIL: webkitBackgroundSize from [0px 0px] to [80px 80px] was [auto, auto, auto, auto] at 0.75, expected [ 60px 60px, 60px 60px, 60px 60px, 60px 60px] (parsed as [60px 60px, 60px 60px, 60px 60px, 60px 60px])
-FAIL: webkitBackgroundSize from [0px 0px] to [80px 80px] was [auto, auto, auto, auto] at 1, expected [ 80px 80px, 80px 80px, 80px 80px, 80px 80px] (parsed as [80px 80px, 80px 80px, 80px 80px, 80px 80px])
-FAIL: webkitBackgroundSize from [0px 0px] to [80px 80px] was [auto, auto, auto, auto] at 1.25, expected [100px 100px, 100px 100px, 100px 100px, 100px 100px]
-FAIL: webkitBackgroundSize from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] was [auto, auto, auto, auto] at -0.25, expected [ 0px 0px, 80px 0px, 0px 0px, 90px 0px] (parsed as [0px 0px, 80px 0px, 0px 0px, 90px 0px])
-FAIL: webkitBackgroundSize from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] was [auto, auto, auto, auto] at 0, expected [ 0px 0px, 80px 0px, 0px 0px, 80px 0px] (parsed as [0px 0px, 80px 0px, 0px 0px, 80px 0px])
-FAIL: webkitBackgroundSize from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] was [auto, auto, auto, auto] at 0.25, expected [10px 10px, 80px 20px, 0px 20px, 70px 10px] (parsed as [10px 10px, 80px 20px, 0px 20px, 70px 10px])
-FAIL: webkitBackgroundSize from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] was [auto, auto, auto, auto] at 0.5, expected [20px 20px, 80px 40px, 0px 40px, 60px 20px] (parsed as [20px 20px, 80px 40px, 0px 40px, 60px 20px])
-FAIL: webkitBackgroundSize from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] was [auto, auto, auto, auto] at 0.75, expected [30px 30px, 80px 60px, 0px 60px, 50px 30px] (parsed as [30px 30px, 80px 60px, 0px 60px, 50px 30px])
-FAIL: webkitBackgroundSize from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] was [auto, auto, auto, auto] at 1, expected [40px 40px, 80px 80px, 0px 80px, 40px 40px] (parsed as [40px 40px, 80px 80px, 0px 80px, 40px 40px])
-FAIL: webkitBackgroundSize from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] was [auto, auto, auto, auto] at 1.25, expected [50px 50px, 80px 100px, 0px 100px, 30px 50px]
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