Check stepUp() and stepDown() bahevior for range type. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". function arguments are (min, max, step, value, [stepCount]) Using the default values PASS stepUpExplicitBounds(null, null, null, "") is "51" PASS stepDownExplicitBounds(null, null, null, "") is "49" Non-number arguments (stepCount) PASS stepUpExplicitBounds(null, null, null, "0", "0") is "0" PASS stepDownExplicitBounds(null, null, null, "0", "0") is "0" PASS stepUpExplicitBounds(null, null, null, "0", "foo") is "0" PASS stepDownExplicitBounds(null, null, null, "0", "foo") is "0" PASS stepUpExplicitBounds(null, null, null, "0", null) is "0" PASS stepDownExplicitBounds(null, null, null, "0", null) is "0" Normal cases PASS stepUpExplicitBounds(null, null, null, "0") is "1" PASS stepUpExplicitBounds(null, null, null, "1", 2) is "3" PASS stepUpExplicitBounds(null, null, null, "3", -1) is "2" PASS stepDownExplicitBounds("-100", null, null, "2") is "1" PASS stepDownExplicitBounds("-100", null, null, "1", 2) is "-1" PASS stepDownExplicitBounds("-100", null, null, "-1", -1) is "0" Extra arguments PASS setInputAttributes(null, null, null, "0"); input.stepUp(1,2); input.value is "1" PASS setInputAttributes(null, null, null, "1"); input.stepDown(1,3); input.value is "0" Invalid step value PASS stepUpExplicitBounds(null, null, "foo", "0") is "1" PASS stepUpExplicitBounds(null, null, "0", "1") is "2" PASS stepUpExplicitBounds(null, null, "-1", "2") is "3" PASS stepDownExplicitBounds(null, null, "foo", "1") is "0" PASS stepDownExplicitBounds(null, null, "0", "2") is "1" PASS stepDownExplicitBounds(null, null, "-1", "3") is "2" Step=any PASS stepUpExplicitBounds(null, null, "any", "1") threw exception Error: InvalidStateError: DOM Exception 11. PASS stepDownExplicitBounds(null, null, "any", "1") threw exception Error: InvalidStateError: DOM Exception 11. Overflow/underflow PASS stepUpExplicitBounds(null, "100", "1", "99") is "100" PASS stepUpExplicitBounds(null, "100", "1", "100") threw exception Error: InvalidStateError: DOM Exception 11. PASS input.value is "100" PASS stepUpExplicitBounds(null, "100", "1", "99", "2") threw exception Error: InvalidStateError: DOM Exception 11. PASS input.value is "99" PASS stepDownExplicitBounds("0", null, "1", "1") is "0" PASS stepDownExplicitBounds("0", null, "1", "0") threw exception Error: InvalidStateError: DOM Exception 11. PASS input.value is "0" PASS stepDownExplicitBounds("0", null, "1", "1", "2") threw exception Error: InvalidStateError: DOM Exception 11. PASS input.value is "1" PASS stepDownExplicitBounds(null, null, "3.40282346e+38", "1", "2") threw exception Error: InvalidStateError: DOM Exception 11. PASS stepUpExplicitBounds(-100, 0, 1, -1) is "0" PASS stepUpExplicitBounds(null, 0, 1, 0) threw exception Error: InvalidStateError: DOM Exception 11. PASS stepUpExplicitBounds(-100, 0, 1, -1, 2) threw exception Error: InvalidStateError: DOM Exception 11. PASS input.value is "-1" PASS stepUpExplicitBounds(null, null, "3.40282346e+38", "1", "2") threw exception Error: InvalidStateError: DOM Exception 11. stepDown()/stepUp() for stepMismatch values PASS stepUpExplicitBounds(null, null, 2, 1) is "4" PASS input.stepDown(); input.value is "2" PASS stepUpExplicitBounds(0, null, 10, 9, 9) is "100" PASS stepDownExplicitBounds(0, null, 10, 19) is "10" value + step is <= max, but rounded result would be > max. PASS stepUpExplicitBounds(null, 99, 10, 89) threw exception Error: InvalidStateError: DOM Exception 11. Huge value and small step PASS stepUpExplicitBounds(0, 1e38, 1, 1e38, 999999) is "1e+38" PASS stepDownExplicitBounds(0, 1e38, 1, 1e38, 999999) is "1e+38" Fractional numbers PASS stepUpExplicitBounds(null, null, 0.33333333333333333, 0, 3) is "1" PASS stepUpExplicitBounds(null, null, 0.1, 1) is "1.1" PASS stepUpExplicitBounds(null, null, 0.1, 1, 8) is "1.8" PASS stepUpExplicitBounds(null, null, 0.1, 1, 10) is "2" PASS input.stepUp(); input.stepUp(); input.stepUp(); input.stepUp(); input.stepUp(); input.stepUp(); input.stepUp(); input.stepUp(); input.stepUp(); input.stepUp(); input.value is "3" PASS stepUpExplicitBounds(0, 1, 0.003921568627450980, 0, 255) is "1" PASS for (var i = 0; i < 255; i++) { input.stepDown(); }; input.value is "0" PASS stepDownExplicitBounds(null, null, 0.1, 1, 8) is "0.2" PASS stepDownExplicitBounds(null, null, 0.1, 1) is "0.9" PASS successfullyParsed is true TEST COMPLETE