Tests formatting of position.toString().
On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
PASS position.coords.latitude is mockLatitude
PASS position.coords.longitude is mockLongitude
PASS position.coords.accuracy is mockAccuracy
PASS position.toString() is "[object Geoposition]"
PASS position.coords.toString() is "[object Coordinates]"
PASS successfullyParsed is true
TEST COMPLETE