ShadowRoot-interface.html

<!DOCTYPE html>

<html>

<head>

<title>Shadow DOM: ShadowRoot interface</title>

<meta name="author" title="Ryosuke Niwa" href="mailto:rniwa@webkit.org">

<meta name="assert" content="ShadowRoot interface and its attributes must be defined">

<link rel="help" href="https://w3c.github.io/webcomponents/spec/shadow/#the-shadowroot-interface">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

</head>

<body>

<div id="log"></div>

<script>

test(function () {

    assert_true('ShadowRoot' in window, '"ShadowRoot" exists on window');

}, 'Check the existence of ShadowRoot interface');

test(function () {

    assert_equals(Object.getPrototypeOf(ShadowRoot.prototype), DocumentFragment.prototype, 'ShadowRoot must inherit from DocumentFragment');

}, 'ShadowRoot must inherit from DocumentFragment');

test(function () {

    assert_throws_js(TypeError, function () { new ShadowRoot(); }, 'new ShadowRoot() must throw a TypeError');

}, 'ShadowRoot must not be a constructor');

function testActiveElement(mode) {

    test(function () {

        var host = document.createElement('div');

        document.body.appendChild(host);

        var shadowRoot = host.attachShadow({'mode': mode});

        shadowRoot.appendChild(document.createElement('input'));

        assert_equals(shadowRoot.activeElement, null, 'ShadowRoot.host must return null if an ' + mode + ' shadow tree does not have a focused element');

        shadowRoot.firstChild.focus();

        assert_equals(shadowRoot.activeElement, shadowRoot.firstChild, 'ShadowRoot.host must return the focused element of an ' + mode + ' shadow tree');

        host.remove();

        assert_equals(shadowRoot.activeElement, null, 'ShadowRoot.host must return null if an ' + mode + ' shadow tree lost focus');

    }, 'ShadowRoot.activeElement must return the focused element of the context object when shadow root is ' + mode + '.');

testActiveElement('open');

testActiveElement('closed');

test(function () {

    var host1 = document.createElement('div');

    assert_equals(host1.attachShadow({'mode': 'open'}).host, host1, 'ShadowRoot.host must return the shadow host of an open shadow tree')

    var host2 = document.createElement('div');

    assert_equals(host2.attachShadow({'mode': 'closed'}).host, host2, 'ShadowRoot.host must return the shadow host of a closed shadow tree');

}, 'ShadowRoot.host must return the shadow host of the context object.');

function testInnerHTML(mode) {

    test(function () {

        var host = document.createElement('div');

        var shadowRoot = host.attachShadow({'mode': mode});

        assert_equals(shadowRoot.innerHTML, '', 'ShadowRoot.innerHTML must be an empty string when the shadow root does not have any children');

        shadowRoot.appendChild(document.createTextNode('hello'));

        assert_equals(shadowRoot.innerHTML, 'hello', 'ShadowRoot.innerHTML must serialize a text node child');

        shadowRoot.appendChild(document.createElement('span'));

        assert_equals(shadowRoot.innerHTML, 'hello<span></span>', 'ShadowRoot.innerHTML must serialize a HTML element child');

    }, 'ShadowRoot.innerHTML must return the result of the HTML fragment serialization algorithm when shadow root is ' + mode + '.');

testInnerHTML('open');

testInnerHTML('closed');

function testSetInnerHTML(mode) {

    test(function () {

        var host = document.createElement('div');

        var shadowRoot = host.attachShadow({'mode': mode});

        shadowRoot.innerHTML = 'hello';

        assert_equals(shadowRoot.childNodes.length, 1, 'ShadowRoot.innerHTML = "hello" must insert a single child (text node)');

        assert_true(shadowRoot.firstChild instanceof Text, 'The first child of the shadow root after ShadowRoot.innerHTML = "hello" must be a Text node');

        assert_equals(shadowRoot.firstChild.data, 'hello', 'The first Text node should contain the string "hello" after ShadowRoot.innerHTML = "hello"');

        shadowRoot.innerHTML = '<b>hello</b>';

        assert_equals(shadowRoot.childNodes.length, 1, 'ShadowRoot.innerHTML = "<b>hello</b>" must insert a single child (b)');

        assert_true(shadowRoot.firstChild instanceof HTMLElement, 'The first child of the shadow root after ShadowRoot.innerHTML = "<b>hello</b>" must be a HTML element');

        assert_equals(shadowRoot.firstChild.localName, 'b', 'The local name of the shadow root\'s first child after ShadowRoot.innerHTML = "<b>hello</b>" must be "b"');

        assert_equals(shadowRoot.innerHTML, '<b>hello</b>', 'ShadowRoot.innerHTML must be "<b>hello</b>" after ShadowRoot.innerHTML = "<b>hello</b>"');

        shadowRoot.innerHTML = '';

        assert_equals(shadowRoot.childNodes.length, 0, 'ShadowRoot.innerHTML = "" must remove all its children');

    }, 'ShadowRoot.innerHTML must replace all with the result of invoking the fragment parsing algorithm when shadow root is ' + mode + '.');

testSetInnerHTML('open');

testSetInnerHTML('closed');

function testStyleSheets(mode) {

    test(function () {

        var host = document.createElement('div');

        var shadowRoot = host.attachShadow({'mode': mode});

        shadowRoot.innerHTML = '<span></span><style> a.rule {} </style><style> b.rule {} </style>';

        assert_equals(shadowRoot.styleSheets.length, 0, 'shadowRoot.styleSheets must be empty when the shadow root is not connected');

        var styles = shadowRoot.querySelectorAll('style');

        assert_equals(styles[0].sheet, null, "Sheet should be null in a disconnected tree");

        assert_equals(styles[1].sheet, null, "Sheet should be null in a disconnected tree");

        document.body.appendChild(host);

        assert_equals(shadowRoot.styleSheets.length, 2, 'shadowRoot.styleSheets must contain two items when the shadow root has two style elements');

        assert_equals(shadowRoot.styleSheets[0], styles[0].sheet, 'shadowRoot.styleSheets[0] must be the first style element in the shadow root');

        assert_equals(shadowRoot.styleSheets[1], styles[1].sheet, 'shadowRoot.styleSheets[1] must be the second style element in the shadow root');

        host.remove();

        assert_equals(shadowRoot.styleSheets.length, 0, 'shadowRoot.styleSheets must be empty when the shadow root is not connected');

        assert_equals(styles[0].sheet, null, "Sheet should be null in a disconnected tree");

        assert_equals(styles[1].sheet, null, "Sheet should be null in a disconnected tree");

    }, 'ShadowRoot.styleSheets must return a StyleSheetList sequence containing the shadow root style sheets when shadow root is ' + mode + '.');

testStyleSheets('open');

testStyleSheets('closed');

</script>

</body>

</html>

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