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<!DOCTYPE html>
<html lang="en">
<title>HTMLSelectListElement Test: ask-for-reset</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<form name="fm1" id="form1">
<selectlist id="selectlist1">
<option>one</option>
<option>two</option>
</selectlist>
<selectlist id="selectlist2">
<option>one</option>
<option selected>two</option>
</selectlist>
<selectlist id="selectlist3">
<option>one</option>
<option selected>two</option>
<option selected>three</option>
</selectlist>
</form>
<script>
function createSelectList(numberOfOptions) {
let selectList = document.createElement("selectlist");
for (let i = 0; i < numberOfOptions; i++) {
let option = document.createElement("option");
option.value = i;
selectList.appendChild(option);
}
return selectList;
}
function checkSelection(selectList, selectedOptionIndex, msg) {
for (let i = 0; i < selectList.children.length; i++) {
if (i != selectedOptionIndex) {
assert_false(selectList.children[i].selected);
}
}
assert_true(selectList.children[selectedOptionIndex].selected, msg);
assert_equals(selectList.value, selectList.children[selectedOptionIndex].value);
}
test(() => {
let selectList = createSelectList(5);
selectList.children[4].selected = true;
checkSelection(selectList, 4);
selectList.children[4].remove();
checkSelection(selectList, 0, "After removing the selected option, selection should default to first option.");
selectList.children[3].selected = true;
checkSelection(selectList, 3);
selectList.children[0].remove();
checkSelection(selectList, 2, "Removing non-selected option should have no effect.");
}, "ask-for-reset when removing option");
test(() => {
let selectList = createSelectList(3);
selectList.children[1].selected = true;
let newOption = document.createElement("option");
newOption.selected = true;
selectList.appendChild(newOption);
checkSelection(selectList, 3, "Inserting a selected option should update selection.");
let newOption2 = document.createElement("option");
newOption2.selected = true;
selectList.prepend(newOption2);
checkSelection(selectList, 0, "Inserting a selected option should update selection, even though it's not last in tree order.");
let newOption3 = document.createElement("option");
selectList.appendChild(newOption3);
checkSelection(selectList, 0, "Inserting a non-selected option should have no effect.");
}, "ask-for-reset when inserting option");
test(() => {
let selectList = createSelectList(3);
let options = selectList.children;
// select options from first to last
for (let i = 0; i < options.length; i++) {
options[i].selected = true;
checkSelection(selectList, i);
}
// select options from last to first
for (let i = options.length - 1; i >= 0; i--) {
options[i].selected = true;
checkSelection(selectList, i);
}
options[2].selected = true;
checkSelection(selectList, 2);
options[2].selected = false;
checkSelection(selectList, 0, "First non-disabled option should be selected.");
options[0].disabled = true;
options[2].selected = true;
checkSelection(selectList, 2);
options[2].selected = false;
checkSelection(selectList, 1, "First non-disabled option should be selected.");
}, "ask-for-reset when changing selectedness of option");
test(() => {
let selectList1 = document.getElementById("selectlist1");
let selectList2 = document.getElementById("selectlist2");
let selectList3 = document.getElementById("selectlist3");
document.getElementById("form1").reset();
assert_equals(selectList1.value, "one", "First non-disabled option should be selected.");
assert_equals(selectList2.value, "two", "The selected option should be selected.");
assert_equals(selectList3.value, "three", "Last selected option should be selected.")
}, "ask-for-reset for form");
</script>
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