Test that collapseToStart() and collapseToEnd() throw INVALID_STATE_ERR if no selection is made.
On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
PASS sel.collapseToStart() threw exception Error: INVALID_STATE_ERR: DOM Exception 11.
PASS sel.collapseToEnd() threw exception Error: INVALID_STATE_ERR: DOM Exception 11.
PASS sel.collapseToStart() is undefined
PASS sel.collapseToEnd() is undefined
PASS successfullyParsed is true
TEST COMPLETE