1 Check stepping-up and -down for datetime-local input fields from renderer.
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
6 Function arguments are (value, step, min, max, [keySequence]).
7 The hour field respects min/max attributes when they have the same date.
8 PASS stepUp("2013-01-16T17:00", 1, "2013-01-16T15:00", "2013-01-16T17:00") is "2013-01-16T15:00"
9 PASS stepDown("2013-01-16T15:00", 1, "2013-01-16T15:00", "2013-01-16T17:00") is "2013-01-16T17:00"
10 PASS stepUp("2013-01-16T17:00", 1, "2013-01-16T15:00", "2013-01-17T17:00") is "2013-01-16T18:00"
11 PASS stepDown("2013-01-16T17:00", 1, "2013-01-16T17:00", "2013-01-17T20:00") is "2013-01-16T16:00"
13 PASS successfullyParsed is true