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<!doctype html>
<meta charset=utf-8>
<title>HTMLSelectElement.checkValidity</title>
<link rel="help" href="https://html.spec.whatwg.org/multipage/forms.html#the-select-element:attr-select-required-4">
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<div id=log></div>
<script>
test(function() {
var select = document.createElement('select');
assert_true(select.willValidate, "A select element is a submittable element that is a candidate for constraint validation.");
var placeholder = document.createElement('option');
select.appendChild(placeholder);
assert_true(select.checkValidity(), "Always valid when the select isn't a required value.");
select.required = true;
assert_true(placeholder.selected, "If display size is 1, multiple is absent and no options have selectedness true, the first option is selected.");
assert_equals(select.value, "", "The placeholder's value should be the select's value right now");
assert_false(select.checkValidity(), "A selected placeholder option should invalidate the select.");
var emptyOption = document.createElement('option');
select.appendChild(emptyOption);
emptyOption.selected = true;
assert_equals(select.value, "", "The empty value should be set.");
assert_true(select.checkValidity(), "An empty non-placeholder option should be a valid choice.");
var filledOption = document.createElement('option');
filledOption.value = "test";
select.appendChild(filledOption);
filledOption.selected = true;
assert_equals(select.value, "test", "The non-empty value should be set.");
assert_true(select.checkValidity(), "A non-empty non-placeholder option should be a valid choice.");
select.removeChild(placeholder);
select.appendChild(emptyOption); // move emptyOption to second place
emptyOption.selected = true;
assert_equals(select.value, "", "The empty value should be set.");
assert_true(select.checkValidity(), "Only the first option can be seen as a placeholder.");
placeholder.disabled = true;
select.insertBefore(placeholder, filledOption);
placeholder.selected = true;
assert_equals(select.value, "", "A disabled first placeholder option should result in an empty value.");
assert_false(select.checkValidity(), "A disabled first placeholder option should invalidate the select.");
}, "Placeholder label options within a select");
test(function() {
var select = document.createElement('select');
select.required = true;
var optgroup = document.createElement('optgroup');
var emptyOption = document.createElement('option');
optgroup.appendChild(emptyOption);
select.appendChild(optgroup);
emptyOption.selected = true;
assert_equals(select.value, "", "The empty value should be set.");
assert_true(select.checkValidity(), "The first option is not considered a placeholder if it is located within an optgroup.");
var otherEmptyOption = document.createElement('option');
otherEmptyOption.value = "";
select.appendChild(otherEmptyOption);
otherEmptyOption.selected = true;
assert_equals(select.value, "", "The empty value should be set.");
assert_true(select.checkValidity(), "The empty option should be accepted as it is not the first option in the tree ordered list.");
}, "Placeholder label-like options within optgroup");
test(function() {
var select = document.createElement('select');
select.required = true;
select.size = 2;
var emptyOption = document.createElement('option');
select.appendChild(emptyOption);
assert_false(emptyOption.selected, "Display size is not 1, so the first option should not be selected.");
assert_false(select.checkValidity(), "If no options are selected the select must be seen as invalid.");
emptyOption.selected = true;
assert_true(select.checkValidity(), "If one option is selected, the select should be considered valid.");
var otherEmptyOption = document.createElement('option');
otherEmptyOption.value = "";
select.appendChild(otherEmptyOption);
otherEmptyOption.selected = true;
assert_false(emptyOption.selected, "Whenever an option has its selectiveness set to true, the other options must be set to false.");
otherEmptyOption.selected = false;
assert_false(otherEmptyOption.selected, "It should be possible to set the selectiveness to false with a display size more than one.");
assert_false(select.checkValidity(), "If no options are selected the select must be seen as invalid.");
}, "Validation on selects with display size set as more than one");
test(function() {
var select = document.createElement('select');
select.required = true;
select.multiple = true;
var emptyOption = document.createElement('option');
select.appendChild(emptyOption);
assert_false(select.checkValidity(), "If no options are selected the select must be seen as invalid.");
emptyOption.selected = true;
assert_true(select.checkValidity(), "If one option is selected, the select should be considered valid.");
var optgroup = document.createElement('optgroup');
optgroup.appendChild(emptyOption); // Move option to optgroup
select.appendChild(optgroup);
assert_true(select.checkValidity(), "If one option within an optgroup or not is selected, the select should be considered valid.");
}, "Validation on selects with multiple set");
test(function() {
var select = document.createElement('select');
select.required = true;
var option = document.createElement('option');
option.value = 'test';
option.disabled = true;
option.selected = true;
select.appendChild(option);
assert_true(select.checkValidity(), "When a required select has an option that is selected and disabled, the select should be considered valid.");
}, "Validation on selects with non-empty disabled option");
test(function() {
var select = document.createElement('select');
select.required = true;
var placeholder = document.createElement('option');
select.appendChild(placeholder);
var nonPlaceholder = document.createElement('option');
nonPlaceholder.textContent = "non-placeholder-option";
select.appendChild(nonPlaceholder);
assert_false(select.checkValidity(), "If the placeholder label option is selected, required select element shouldn't be valid.");
placeholder.remove();
assert_true(select.checkValidity(), "If the placeholder label option is removed, required select element should become valid.");
select.prepend(placeholder);
assert_false(select.checkValidity(), "If the placeholder label option is selected, required select element shouldn't be valid.");
}, "Remove and add back the placeholder label option");
</script>
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