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<!doctype html>
<meta charset=utf-8>
<title>HTMLSelectElement selectedIndex</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id=log></div>
<form id=form>
<select id=empty></select>
<select id=default>
<option></option>
<option></option>
<option></option>
<option></option>
<option></option>
</select>
<select id=disabled>
<option disabled></option>
<option></option>
</select>
<select id=selected>
<option></option>
<option selected></option>
</select>
<select id=display-none>
<option style="display:none"></option>
<option></option>
</select>
<select id=minus-one>
<option value=1>1</option>
<option value=2>2</option>
</select>
</form>
<script>
function assertSelectedIndex(select, value) {
assert_equals(select.selectedIndex, value);
assert_equals(select.options.selectedIndex, value);
}
function assertSelectValue(select, value) {
assert_equals(select.value, value);
}
test(function () {
var select = document.getElementById('empty');
assertSelectedIndex(select, -1);
}, "get empty");
test(function () {
var select = document.getElementById('default');
assertSelectedIndex(select, 0);
}, "get default");
test(function () {
var select = document.getElementById('disabled');
assertSelectedIndex(select, 1);
}, "get disabled");
test(function () {
var select = document.getElementById('selected');
assertSelectedIndex(select, 1);
}, "get unselected");
test(function () {
var select = document.getElementById('empty');
select.selectedIndex = 1;
assertSelectedIndex(select, -1);
}, "set empty (HTMLSelectElement)");
test(function () {
var select = document.getElementById('empty');
select.options.selectedIndex = 1;
assertSelectedIndex(select, -1);
}, "set empty (HTMLOptionsCollection)");
test(function () {
var select = document.getElementById('default');
assertSelectedIndex(select, 0);
select.selectedIndex = 2;
assertSelectedIndex(select, 2);
this.add_cleanup(() => { select.selectedIndex = 0; });
}, "set (HTMLSelectElement)");
test(function () {
var select = document.getElementById('default');
assertSelectedIndex(select, 0);
select.options.selectedIndex = 2;
assertSelectedIndex(select, 2);
this.add_cleanup(() => { select.selectedIndex = 0; });
}, "set (HTMLOptionsCollection)");
test(function () {
var select = document.getElementById('selected');
var form = document.getElementById('form');
assertSelectedIndex(select, 1);
select.selectedIndex = 0;
assertSelectedIndex(select, 0);
form.reset();
assertSelectedIndex(select, 1);
}, "set and reset (HTMLSelectElement)");
test(function () {
var select = document.getElementById('selected');
var form = document.getElementById('form');
assertSelectedIndex(select, 1);
select.options.selectedIndex = 0;
assertSelectedIndex(select, 0);
form.reset();
assertSelectedIndex(select, 1);
}, "set and reset (HTMLOptionsCollection)");
test(function () {
var select = document.getElementById('display-none');
assertSelectedIndex(select, 0);
}, "get display:none");
test(function () {
var select = document.getElementById('display-none');
select.offsetTop; // force rendering
assertSelectedIndex(select, 0);
select.options[1].selected = true;
assertSelectedIndex(select, 1);
select.options[1].selected = false;
assertSelectedIndex(select, 0);
}, "reset to display:none");
test(function() {
var select = document.getElementById("minus-one");
assertSelectedIndex(select, 0);
select.selectedIndex = -1;
assertSelectedIndex(select, -1);
assertSelectValue(select, "");
}, "set selectedIndex=-1");
</script>
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