|  | Running 5 tests | 
|  | ok 1 MutationObserver.observe on a subtree should handle basic aspects of subtree observation | 
|  | ok 2 MutationObserver.observe on a subtree should handle two observers at different depths | 
|  | ok 3 MutationObserver.observe on a subtree should handle one observer at two different depths | 
|  | ok 4 MutationObserver.observe on a subtree should handle transiently detached nodes are still observed via subtree | 
|  | ok 5 MutationObserver.observe on a subtree should have correct behavior of transient observation with complex movement | 
|  | 5 tests | 
|  | 5 pass | 
|  | 0 fail |