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<!DOCTYPE HTML>
<html>
<head>
<title>valueAsNumber stepping</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<p>
<h3>input_valueAsNumber_stepping</h3>
<!-- This test verifies that valueAsNumber reads and writes number values,
that those values step by the correct default step, and that the values
represent the correct milliseconds/months.
-->
</p>
<hr>
<div id="log"></div>
<form method="post"
enctype="application/x-www-form-urlencoded"
action=""
name="input_form">
<p><input type='date' id='input_date'></p>
<p><input type='time' id='input_time'></p>
<p><input type='week' id='input_week'></p>
<p><input type='month' id='input_month'></p>
<p><input type='datetime-local' id='input_datetime-local'></p>
<p><input type='range' id='input_range'></p>
<p><input type='number' id='input_number'></p>
</form>
<script>
function test_stepping(inputType, stringValue, steppedString, baseNumber, stepAmount) {
test(function() {
// put number in
input = document.getElementById("input_" + inputType);
input.valueAsNumber = baseNumber
// get string out
// startsWith is here to allow for optional seconds and milliseconds.
// the replace("T", " ") fallback is for https://github.com/web-platform-tests/wpt/issues/20994
var sanitizedStr = input.value;
assert_true(sanitizedStr.startsWith(stringValue) || sanitizedStr.startsWith(stringValue.replace("T", " ")),
"The input value [" + sanitizedStr + "] must resemble [" + stringValue + "]");
// get number out
var sanitized = input.valueAsNumber;
assert_equals(sanitized, baseNumber, "The input valueAsNumber must equal the original number.")
// step up, get new date out
input.stepUp()
var steppedNumber = input.valueAsNumber;
assert_equals(steppedNumber, baseNumber + stepAmount, "Stepping must be by the correct amount")
// get new string out
var steppedStrOut = input.value;
assert_true(steppedStrOut.startsWith(steppedString) || steppedStrOut.startsWith(steppedString.replace("T", " ")),
"The changed input value [" + steppedStrOut + "] must resemble [" + steppedString + "]");
// step back down, get first date out again
input.stepDown()
var backDown = input.valueAsNumber;
assert_equals(backDown, baseNumber, "Stepping back down must return the number to its original value");
}, inputType + " should step correctly");
}
var millis_per_day = 24 * 60 * 60 * 1000;
// jan 1 midnight, step 1 day to jan 2
test_stepping("date", "1970-01-01", "1970-01-02", 0, millis_per_day);
// jan 1 midnight, step 1 minute to 00:01:00
test_stepping("time", "00:00", "00:01", 0, 60 * 1000);
// jan 1 midnight, step 1 month (not counting by milliseconds) to feb 1
test_stepping("month", "1970-01", "1970-02", 0, 1);
// monday jan 5 1970 midnight, step 7 days to jan 12
// (this has to start on a monday for stepping up and down to return)
test_stepping("week", "1970-W02", "1970-W03", 4 * millis_per_day, 7 * millis_per_day);
// jan 1 midnight, step 1 minute to 00:01:00
test_stepping("datetime-local", "1970-01-01T00:00", "1970-01-01T00:01", 0, 60 * 1000);
// numbers, for which the default step is 1
test_stepping("range", "22", "23", 22, 1);
test_stepping("number", "24", "25", 24, 1);
</script>
</body>
</html>
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