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Test Info:
- Manifest: dom/html/test/forms/mochitest.toml
<!DOCTYPE HTML>
<html>
<!--
-->
<head>
<title>Test key events for number control</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/EventUtils.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
<meta charset="UTF-8">
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=935506">Mozilla Bug 935506</a>
<p id="display"></p>
<div id="content">
<input id="input" type="number">
</div>
<pre id="test">
<script type="application/javascript">
/**
* This test checks how the value of <input type=number> changes in response to
* key events while it is in various states.
**/
SimpleTest.waitForExplicitFinish();
SimpleTest.waitForFocus(function() {
test();
SimpleTest.finish();
});
const defaultMinimum = "NaN";
const defaultMaximum = "NaN";
const defaultStep = 1;
// Helpers:
// For the sake of simplicity, we do not currently support fractional value,
// step, etc.
function getMinimum(element) {
return Number(element.min || defaultMinimum);
}
function getMaximum(element) {
return Number(element.max || defaultMaximum);
}
function getDefaultValue(element) {
return 0;
}
function getValue(element) {
return Number(element.value || getDefaultValue(element));
}
function getStep(element) {
if (element.step == "any") {
return "any";
}
var step = Number(element.step || defaultStep);
return step <= 0 ? defaultStep : step;
}
function getStepBase(element) {
return Number(element.getAttribute("min") || "NaN") ||
Number(element.getAttribute("value") || "NaN") || 0;
}
function hasStepMismatch(element) {
var value = element.value;
if (value == "") {
value = 0;
}
var step = getStep(element);
if (step == "any") {
return false;
}
return ((value - getStepBase(element)) % step) != 0;
}
function floorModulo(x, y) {
return (x - y * Math.floor(x / y));
}
function expectedValueAfterStepUpOrDown(stepFactor, element) {
var value = getValue(element);
if (isNaN(value)) {
value = 0;
}
var step = getStep(element);
if (step == "any") {
step = 1;
}
var minimum = getMinimum(element);
var maximum = getMaximum(element);
if (!isNaN(maximum)) {
// "max - (max - stepBase) % step" is the nearest valid value to max.
maximum = maximum - floorModulo(maximum - getStepBase(element), step);
}
// Cases where we are clearly going in the wrong way.
// We don't use ValidityState because we can be higher than the maximal
// allowed value and still not suffer from range overflow in the case of
// of the value specified in @max isn't in the step.
if ((value <= minimum && stepFactor < 0) ||
(value >= maximum && stepFactor > 0)) {
return value;
}
if (hasStepMismatch(element) &&
value != minimum && value != maximum) {
if (stepFactor > 0) {
value -= floorModulo(value - getStepBase(element), step);
} else if (stepFactor < 0) {
value -= floorModulo(value - getStepBase(element), step);
value += step;
}
}
value += step * stepFactor;
// When stepUp() is called and the value is below minimum, we should clamp on
// minimum unless stepUp() moves us higher than minimum.
if (element.validity.rangeUnderflow && stepFactor > 0 &&
value <= minimum) {
value = minimum;
} else if (element.validity.rangeOverflow && stepFactor < 0 &&
value >= maximum) {
value = maximum;
} else if (stepFactor < 0 && !isNaN(minimum)) {
value = Math.max(value, minimum);
} else if (stepFactor > 0 && !isNaN(maximum)) {
value = Math.min(value, maximum);
}
return value;
}
function expectedValAfterKeyEvent(key, element) {
return expectedValueAfterStepUpOrDown(key == "KEY_ArrowUp" ? 1 : -1, element);
}
function test() {
var elem = document.getElementById("input");
elem.focus();
elem.min = -5;
elem.max = 5;
elem.step = 2;
var defaultValue = 0;
var oldVal, expectedVal;
for (key of ["KEY_ArrowUp", "KEY_ArrowDown"]) {
// Start at middle:
oldVal = elem.value = -1;
expectedVal = expectedValAfterKeyEvent(key, elem);
synthesizeKey(key);
is(elem.value, String(expectedVal), "Test " + key + " for number control with value set between min/max (" + oldVal + ")");
// Same again:
expectedVal = expectedValAfterKeyEvent(key, elem);
synthesizeKey(key);
is(elem.value, String(expectedVal), "Test repeat of " + key + " for number control");
// Start at maximum:
oldVal = elem.value = elem.max;
expectedVal = expectedValAfterKeyEvent(key, elem);
synthesizeKey(key);
is(elem.value, String(expectedVal), "Test " + key + " for number control with value set to the maximum (" + oldVal + ")");
// Same again:
expectedVal = expectedValAfterKeyEvent(key, elem);
synthesizeKey(key);
is(elem.value, String(expectedVal), "Test repeat of " + key + " for number control");
// Start at minimum:
oldVal = elem.value = elem.min;
expectedVal = expectedValAfterKeyEvent(key, elem);
synthesizeKey(key);
is(elem.value, String(expectedVal), "Test " + key + " for number control with value set to the minimum (" + oldVal + ")");
// Same again:
expectedVal = expectedValAfterKeyEvent(key, elem);
synthesizeKey(key);
is(elem.value, String(expectedVal), "Test repeat of " + key + " for number control");
// Test preventDefault():
elem.addEventListener("keydown", evt => evt.preventDefault(), {once: true});
oldVal = elem.value = 0;
expectedVal = 0;
synthesizeKey(key);
is(elem.value, String(expectedVal), "Test " + key + " for number control where scripted preventDefault() should prevent the value changing");
// Test step="any" behavior:
var oldStep = elem.step;
elem.step = "any";
oldVal = elem.value = 0;
expectedVal = expectedValAfterKeyEvent(key, elem);
synthesizeKey(key);
is(elem.value, String(expectedVal), "Test " + key + " for number control with value set to the midpoint and step='any' (" + oldVal + ")");
elem.step = oldStep; // restore
// Test that invalid input blocks UI initiated stepping:
oldVal = elem.value = "";
elem.select();
sendString("abc");
synthesizeKey(key);
is(elem.value, "", "Test " + key + " does nothing when the input is invalid");
// Test that no value does not block UI initiated stepping:
oldVal = elem.value = "";
elem.setAttribute("required", "required");
elem.select();
expectedVal = expectedValAfterKeyEvent(key, elem);
synthesizeKey(key);
is(elem.value, String(expectedVal), "Test " + key + " for number control with value set to the empty string and with the 'required' attribute set");
// Same again:
expectedVal = expectedValAfterKeyEvent(key, elem);
synthesizeKey(key);
is(elem.value, String(expectedVal), "Test repeat of " + key + " for number control");
// Reset 'required' attribute:
elem.removeAttribute("required");
}
// Test that key events are correctly dispatched
elem.max = "";
elem.value = "";
sendString("7837281");
is(elem.value, "7837281", "Test keypress event dispatch for number control");
}
</script>
</pre>
</body>
</html>