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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title id='title'>HTMLOptionsCollection</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<select id="selly">
<option>1</option>
<option>2</option>
<option>3</option>
<option>4</option>
</select>
<script>
var selly;
setup(function() {
selly = document.getElementById('selly');
});
test(function () {
assert_equals(selly.length, 4);
}, "On getting, the length attribute must return the number of nodes represented by the collection.");
test(function () {
selly.length = 7;
assert_equals(selly.length, 7,
"Number of nodes in collection should have changed");
assert_equals(selly.children.length, 7,
"Number of children should have changed");
for (var i = 4; i < 7; ++i) {
var child = selly.children[i];
assert_equals(child.localName, "option",
"new child should be an option");
assert_equals(child.namespaceURI, "http://www.w3.org/1999/xhtml",
"new child should be an HTML element");
assert_equals(child.attributes.length, 0,
"new child should not have attributes");
assert_equals(child.childNodes.length, 0,
"new child should not have child nodes");
}
}, "Changing the length adds new nodes; The number of new nodes = new length minus old length");
test(function () {
var elarray = [];
for (var i = 0; i < selly.length; i++) {
elarray.push(selly[i].value);
}
assert_array_equals(elarray, ["1", "2", "3", "4", "", "", ""]);
}, "New nodes have no value");
test(function () {
selly.length = 7;
assert_equals(selly.length, 7,
"Number of nodes in collection should not have changed");
assert_equals(selly.children.length, 7,
"Number of children should not have changed");
}, "Setting a length equal to existing length changes nothing");
test(function () {
selly.length = 4;
assert_equals(selly[6], undefined,
"previously set node is now undefined");
assert_equals(selly.length, 4,
"Number of nodes in collection is correctly changed");
assert_equals(selly.children.length, 4,
"Number of children should have changed");
}, "Setting a length lower than the old length trims nodes from the end");
</script>
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