Tests DOM.getElementByRelation command.
Node Id from query selector and getElementByRelation should be the same:
true
Node Id of PopoverTarget and InterestTarget should be the same because they point to the same element:
true
non-existent target id should be zero: 
0
0
non-existent target id should be zero: 
0
0
Node Id from query selector and getElementByRelation should be the same:
true
Node Id of PopoverTarget and InterestTarget should be the same because they point to the same element:
true
Node Id from query selector and getElementByRelation should be the same:
true
Node Id from query selector and getElementByRelation should be the same:
true
non-existent target id should be zero: 
0
Node Id from query selector and getElementByRelation should be the same:
true