1 Test pointerLockElement is null when a lock is pending.
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
6 PASS document.pointerLockElement is null
8 PASS document.pointerLockElement is null
9 PASS onpointerlockchange received after: Lock.
10 PASS document.pointerLockElement is targetDiv1
12 PASS document.pointerLockElement is targetDiv1
13 PASS onpointerlockchange received after: Unlock.
14 PASS document.pointerLockElement is null
15 PASS successfullyParsed is true