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diff --git a/dom/base/test/chrome/test_bug683852.xhtml b/dom/base/test/chrome/test_bug683852.xhtml
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+<?xml version="1.0"?>
+<?xml-stylesheet type="text/css" href="chrome://global/skin"?>
+<?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=683852
+-->
+<window title="Mozilla Bug 683852"
+ xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+ xmlns:html="http://www.w3.org/1999/xhtml"
+ xmlns:xul="http://www.mozilla.org/keymaster/gaktekeeper/there.is.only.xul">
+ <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
+ <script>
+ <![CDATA[
+ customElements.define("custom-element", class extends XULElement {
+ constructor() {
+ super();
+ const template = document.getElementById("template");
+ this.attachShadow({mode: "open"})
+ .appendChild(template.content.cloneNode(true));
+ }
+ });
+ ]]>
+ </script>
+ <html:template id="template"><xul:box anonid="anon">Anonymous</xul:box></html:template>
+ <custom-element id="custom-element"/>
+
+ <!-- test results are displayed in the html:body -->
+ <body xmlns="http://www.w3.org/1999/xhtml">
+ <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=683852"
+ target="_blank" id="link">Mozilla Bug 683852</a>
+ </body>
+
+ <!-- test code goes here -->
+ <script type="application/javascript">
+ <![CDATA[
+ /** Test for Bug 683852 **/
+ SimpleTest.waitForExplicitFinish();
+
+ const NS_HTML = "http://www.w3.org/1999/xhtml";
+
+ function startTest() {
+ is(document.contains(document), true, "Document should contain itself!");
+
+ let box = document.getElementById("custom-element");
+ is(document.contains(box), true, "Document should contain element in it!");
+ is(box.contains(box), true, "Element should contain itself.")
+ let anon = box.shadowRoot.querySelector("[anonid=anon]");
+ is(document.contains(anon), false, "Document should not contain anonymous element in it!");
+ is(box.contains(anon), false, "Element should not contain anonymous element in it!");
+ is(anon.contains(anon), true, "Anonymous element should contain itself.")
+ is(document.documentElement.contains(box), true, "Element should contain element in it!");
+ is(document.contains(document.createXULElement("foo")), false, "Document shouldn't contain element which is't in the document");
+ is(document.contains(document.createTextNode("foo")), false, "Document shouldn't contain text node which is't in the document");
+
+ var link = document.getElementById("link");
+ is(document.contains(link.firstChild), true,
+ "Document should contain a text node in it.");
+ is(link.contains(link.firstChild), true,
+ "Element should contain a text node in it.");
+ is(link.firstChild.contains(link), false, "text node shouldn't contain its parent.");
+
+ is(document.contains(null), false, "Document shouldn't contain null.");
+
+ var pi = document.createProcessingInstruction("adf", "asd");
+ is(pi.contains(document), false, "Processing instruction shouldn't contain document");
+ document.documentElement.appendChild(pi);
+ document.contains(pi, true, "Document should contain processing instruction");
+
+ var df = document.createRange().createContextualFragment(`<div xmlns="${NS_HTML}">foo</div>`);
+ is(df.contains(df.firstChild), true, "Document fragment should contain its child");
+ is(df.contains(df.firstChild.firstChild), true,
+ "Document fragment should contain its descendant");
+ is(df.contains(df), true, "Document fragment should contain itself.");
+
+ var d = document.implementation.createHTMLDocument("");
+ is(document.contains(d), false,
+ "Document shouldn't contain another document.");
+ is(document.contains(d.createElement("div")), false,
+ "Document shouldn't contain an element from another document.");
+
+ SimpleTest.finish();
+ }
+
+ addLoadEvent(startTest);
+ ]]>
+ </script>
+</window>