Tests Geolocation error callback using the mock service.
On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
PASS error.code is mockCode
PASS error.message is mockMessage
PASS error.UNKNOWN_ERROR is undefined
PASS error.PERMISSION_DENIED is 1
PASS error.POSITION_UNAVAILABLE is 2
PASS error.TIMEOUT is 3
PASS successfullyParsed is true
TEST COMPLETE