<!DOCTYPE html>
<head>
    <title>document.all</title>
<body>
<p>Tests document.all</p>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script>

let validNamedElementTags = ['a', 'button', 'embed', 'form', 'frame', 'frameset', 'iframe', 'img', 'input', 'map', 'meta', 'object', 'select', 'textarea'];
let invalidNamedElementTags = ['div', 'span', 'applet'];
let validAnInvalidNamedElementTags = validNamedElementTags.concat(invalidNamedElementTags);

let playground = document.createElement('div');
document.body.append(playground);

test(function() {
    assert_equals(document.all[0], document.documentElement);
    assert_equals(document.all[1], document.head);
    assert_equals(document.all[2], document.head.firstElementChild);
}, "document.all's index getter returns all the elements in document order");

test(function() {
    assert_equals(document.all[document.all.length + 1], undefined);
}, "document.all's index getter returns undefined for indexes greater than length");

test(function() {
    assert_equals(document.all[-1], undefined);
}, "document.all's index getter returns undefined for indexes less than zero");

for (let elementTag of validNamedElementTags) {
    test(function() {
        let element = document.createElement(elementTag);
        element.setAttribute("name", "testName");
        playground.append(element);
    
        assert_equals(document.all.namedItem('testName'), element);
        assert_equals(document.all['testName'], element);
        assert_equals(document.all.item('testName'), element);
        assert_equals(document.all('testName'), element);
    
        element.remove();
    }, "document.all's name attribute accessing works for " + elementTag);
}

for (let elementTag of invalidNamedElementTags) {
    test(function() {
        let element = document.createElement(elementTag);
        element.setAttribute("name", "testName");
        playground.append(element);
    
        assert_equals(document.all.namedItem('testName'), null);
        assert_equals(document.all['testName'], undefined);
        assert_equals(document.all.item('testName'), null);
        assert_equals(document.all('testName'), null);
    
        element.remove();
    }, "document.all's name attribute accessing doesn't work for " + elementTag);
}

for (let elementTag of validAnInvalidNamedElementTags) {
    test(function() {
        let element = document.createElement(elementTag);
        element.setAttribute("id", "testId");
        playground.append(element);
    
        assert_equals(document.all.namedItem('testId'), element);
        assert_equals(document.all['testId'], element);
        assert_equals(document.all.item('testId'), element);
        assert_equals(document.all('testId'), element);
    
        element.remove();
    }, "document.all's id attribute accessing works for " + elementTag);
}

test(function() {
    let element1 = document.createElement('button');
    element1.setAttribute("name", "test");
    playground.append(element1);

    let element2 = document.createElement('span');
    element2.setAttribute("id", "test");
    playground.append(element2);

    assert_equals(document.all.namedItem('test').length, 2);
    assert_equals(document.all['test'].length, 2);
    assert_equals(document.all.item('test').length, 2);
    assert_equals(document.all('test').length, 2);
    assert_class_string(document.all.namedItem('test'), "HTMLCollection");
    assert_class_string(document.all['test'], "HTMLCollection");
    assert_class_string(document.all.item('test'), "HTMLCollection");
    assert_class_string(document.all('test'), "HTMLCollection");

    element1.remove();
    element2.remove();
}, "document.all will return a sub-collection if the name/id is found more than once");

test(function() {
    let element1 = document.createElement('button');
    element1.setAttribute("name", "test");
    playground.append(element1);

    let element2 = document.createElement('span');
    element2.setAttribute("id", "test");
    playground.append(element2);

    let element3 = document.createElement('span');
    element3.setAttribute("name", "test");
    playground.append(element2);

    assert_equals(document.all.namedItem('test').length, 2);
    assert_equals(document.all['test'].length, 2);
    assert_equals(document.all.item('test').length, 2);
    assert_equals(document.all('test').length, 2);
    assert_equals(document.all.namedItem('test')[0], element1);
    assert_equals(document.all.namedItem('test')[1], element2);
    assert_equals(document.all['test'][0], element1);
    assert_equals(document.all['test'][1], element2);
    assert_equals(document.all.item('test')[0], element1);
    assert_equals(document.all.item('test')[1], element2);
    assert_equals(document.all('test')[0], element1);
    assert_equals(document.all('test')[1], element2);

    element1.remove();
    element2.remove();
    element3.remove();
}, "document.all will return a sub-collection if the name/id is found more than once, but still adheres to the rules about what tags can have names");

test(function() {
    let element1 = document.createElement('button');
    element1.setAttribute("name", "test");
    playground.append(element1);

    let element2 = document.createElement('span');
    element2.setAttribute("id", "test");
    playground.append(element2);

    let collection = document.all.namedItem('test');
    assert_equals(collection.length, 2);

    let element3 = document.createElement('img');
    element3.setAttribute("name", "test");
    playground.append(element3);

    assert_equals(collection.length, 3);

    element1.remove();
    element2.remove();

    assert_equals(collection.length, 1);

    element3.remove();
}, "document.all will return a sub-collection if the name/id is found more than once, that is live");

test(function() {
    assert_throws(new TypeError(), function() { document.all.namedItem() });
}, "document.all's namedItem function requires passing an argument");

test(function() {
    assert_equals(document.all.item(), null);
    assert_equals(document.all(), null);
}, "document.all's item function and legacy caller functionality allow passing no arguments");

test(function() {
    let element = document.createElement('button');
    element.setAttribute("name", "0");
    playground.append(element);

    assert_equals(document.all.item('0'), document.documentElement);
    assert_equals(document.all('0'), document.documentElement);
    assert_equals(document.all.namedItem('0'), element);

    element.remove();
}, "document.all's item function and legacy caller functionality will try to convert their DOMString argument to an index before name lookup");

playground.remove();

</script>
</body>