dom/nodes/rootNode.html

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<meta charset=utf-8>
<title>Node.prototype.getRootNode()</title>
<link rel="help" href="https://dom.spec.whatwg.org/#dom-node-getrootnode">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<script>

test(function () {
    var shadowHost = document.createElement('div');
    document.body.appendChild(shadowHost);

    var shadowRoot = shadowHost.attachShadow({mode: 'open'});
    shadowRoot.innerHTML = '<div class="shadowChild">content</div>';

    var shadowChild = shadowRoot.querySelector('.shadowChild');
    assert_equals(shadowChild.getRootNode({composed: true}), document, "getRootNode() must return context object's shadow-including root if options's composed is true");
    assert_equals(shadowChild.getRootNode({composed: false}), shadowRoot, "getRootNode() must return context object's root if options's composed is false");
    assert_equals(shadowChild.getRootNode(), shadowRoot, "getRootNode() must return context object's root if options's composed is default false");

}, "getRootNode() must return context object's shadow-including root if options's composed is true, and context object's root otherwise");

test(function () {
    var element = document.createElement('div');
    assert_equals(element.getRootNode(), element, 'getRootNode() on an element without a parent must return the element itself');

    var text = document.createTextNode('');
    assert_equals(text.getRootNode(), text, 'getRootNode() on a text node without a parent must return the text node itself');

    var processingInstruction = document.createProcessingInstruction('target', 'data');
    assert_equals(processingInstruction.getRootNode(), processingInstruction, 'getRootNode() on a processing instruction node without a parent must return the processing instruction node itself');

    assert_equals(document.getRootNode(), document, 'getRootNode() on a document node must return the document itself');

}, 'getRootNode() must return the context object when it does not have any parent');

test(function () {
    var parent = document.createElement('div');

    var element = document.createElement('div');
    parent.appendChild(element);
    assert_equals(element.getRootNode(), parent, 'getRootNode() on an element with a single ancestor must return the parent node');

    var text = document.createTextNode('');
    parent.appendChild(text);
    assert_equals(text.getRootNode(), parent, 'getRootNode() on a text node with a single ancestor must return the parent node');

    var processingInstruction = document.createProcessingInstruction('target', 'data');
    parent.appendChild(processingInstruction)
    assert_equals(processingInstruction.getRootNode(), parent, 'getRootNode() on a processing instruction node with a single ancestor must return the parent node');

}, 'getRootNode() must return the parent node of the context object when the context object has a single ancestor not in a document');

test(function () {
    var parent = document.createElement('div');
    document.body.appendChild(parent);

    var element = document.createElement('div');
    parent.appendChild(element);
    assert_equals(element.getRootNode(), document, 'getRootNode() on an element inside a document must return the document');

    var text = document.createTextNode('');
    parent.appendChild(text);
    assert_equals(text.getRootNode(), document, 'getRootNode() on a text node inside a document must return the document');

    var processingInstruction = document.createProcessingInstruction('target', 'data');
    parent.appendChild(processingInstruction)
    assert_equals(processingInstruction.getRootNode(), document, 'getRootNode() on a processing instruction node inside a document must return the document');
}, 'getRootNode() must return the document when a node is in document');

test(function () {
    var fragment = document.createDocumentFragment();
    var parent = document.createElement('div');
    fragment.appendChild(parent);

    var element = document.createElement('div');
    parent.appendChild(element);
    assert_equals(element.getRootNode(), fragment, 'getRootNode() on an element inside a document fragment must return the fragment');

    var text = document.createTextNode('');
    parent.appendChild(text);
    assert_equals(text.getRootNode(), fragment, 'getRootNode() on a text node inside a document fragment must return the fragment');

    var processingInstruction = document.createProcessingInstruction('target', 'data');
    parent.appendChild(processingInstruction)
    assert_equals(processingInstruction.getRootNode(), fragment,
        'getRootNode() on a processing instruction node inside a document fragment must return the fragment');
}, 'getRootNode() must return a document fragment when a node is in the fragment');

</script>
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