1 files changed, 41 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/dom/elements/global-attributes/the-lang-attribute-008.html b/testing/web-platform/tests/html/dom/elements/global-attributes/the-lang-attribute-008.html
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index 0000000000..3be54154c1
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+++ b/testing/web-platform/tests/html/dom/elements/global-attributes/the-lang-attribute-008.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<html   >
+<head>
+<meta charset="utf-8"/>
+<title>lang="..." vs lang=""</title>
+<link rel='author' title='Richard Ishida' href='mailto:ishida@w3.org'>
+<link rel='help' href='https://html.spec.whatwg.org/multipage/#the-lang-and-xml:lang-attributes'>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<meta name='flags' content='dom'>
+<style type='text/css'>
+    #colonlangcontroltest { color: red; font-weight: bold; width: 400px; }
+    #colonlangcontroltest:lang(xx) { display:none; }
+.test div { width: 50px; }
+#box:lang(ko) { width: 100px; }
+</style>
+</head>
+<body>
+
+
+
+<div class="test" lang="ko"><div id="box" lang="">&#xA0;</div></div>
+<p lang='xx' id='colonlangcontroltest'>This test failed because it relies on :lang for results, but :lang is not supported by this browser.</p>
+
+
+<!--Notes:
+
+This test uses :lang to detect whether the language has been set. If :lang is not supported, a message will appear and the test will fail.
+
+-->
+<script>
+test(function() {
+assert_equals(document.getElementById('colonlangcontroltest').offsetWidth, 0)
+assert_equals(document.getElementById('box').offsetWidth, 50);
+}, "If an element contains a lang attribute with an empty value, the value of a lang attribute higher up the document tree will no longer be applied to the content of that element.");
+</script>
+
+<div id='log'></div>
+
+</body>
+</html>