1 Tests queryCommandValue returns empty string for unsupported commands
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
6 PASS document.queryCommandValue('foofoo') is ''
7 PASS typeof document.queryCommandValue('foofoo') is 'string'
8 PASS document.queryCommandValue('fontSize') is '5'
9 PASS typeof document.queryCommandValue('fontSize') is 'string'
10 PASS successfullyParsed is true