|  | ERROR: Failed to load resource: the server responded with a status of 404 () | 
|  | SOURCE: http://127.0.0.1:8000/sky/tests/mutation-observer/baz.png:0 | 
|  | Running 14 tests | 
|  | ok 1 MutationObserver.observe on attributes should handle basic aspects of attribute observation | 
|  | ok 2 MutationObserver.observe on attributes should not notify of attribute changes without asking | 
|  | ok 3 MutationObserver.observe on attributes re-observing the same node with the same observer has the effect of resetting the options | 
|  | ok 4 MutationObserver.observe on attributes multiple observers can be registered to a given node and both receive mutations | 
|  | ok 5 MutationObserver.observe on attributes should deliver mutations on modifications to node properties which delegate to attribute storage | 
|  | ok 6 MutationObserver.observe on attributes should handle basic oldValue delivery | 
|  | ok 7 MutationObserver.observe on attributes should deliver oldValue when needed | 
|  | ok 8 MutationObserver.observe on attributes should give attributeOldValue if any entries request it with multiple observers | 
|  | ok 9 MutationObserver.observe on attributes should handle setting an attribute via reflected IDL attribute | 
|  | ok 10 MutationObserver.observe on attributes should respect attributeFilter on HTML elements | 
|  | ok 11 MutationObserver.observe on attributes should respect different attributeFilters when observing multiple subtree nodes | 
|  | ok 12 MutationObserver.observe on attributes should create records for the style property | 
|  | ok 13 MutationObserver.observe on attributes should have oldValue for style property mutations | 
|  | ok 14 MutationObserver.observe on attributes should not create records for noop style property mutation | 
|  | 14 tests | 
|  | 14 pass | 
|  | 0 fail |