1 files changed, 45 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/infrastructure/conformance-requirements/extensibility/foreign.html b/testing/web-platform/tests/html/infrastructure/conformance-requirements/extensibility/foreign.html
new file mode 100644
index 0000000000..eaa133bade
--- /dev/null
+++ b/testing/web-platform/tests/html/infrastructure/conformance-requirements/extensibility/foreign.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<html lang="en" foo='bar'>
+  <head foo='bar'>
+    <meta charset="utf-8" foo='bar'>
+    <title id='title' foo='bar'>Foreign content</title>
+    <link rel="author" title="Philippe Le Hegaret" href="mailto:plh@w3.org"  foo='bar'>
+    <link rel="help" href="https://html.spec.whatwg.org/multipage/#extensibility"  foo='bar'>
+    <script src="/resources/testharness.js"  foo='bar'></script>
+    <script src="/resources/testharnessreport.js" foo='bar'></script>
+  </head>
+
+  <body foo='bar'>
+
+    <p class='assert' foo='bar'>User agents must treat elements and attributes that they do not understand as semantically neutral; leaving them in the DOM (for DOM processors), and styling them according to CSS (for CSS processors), but not inferring any meaning from them.</p>
+
+    <foo foo='bar' echo>Foobar</foo>
+
+    <div id="log">Running test...</div>
+
+    <script>
+      var t = async_test("foreign content");
+
+      on_event(window, "load",
+               t.step_func(function() {
+                 var nodes = document.getElementsByTagName("*");
+                 var cont = true;
+                 var last = null;
+                 for(var i=0;i<nodes.length && cont; i++) {
+                   var as = nodes.item(i).getAttribute("foo");
+                   if (!(as === "bar") && (nodes.item(i).getAttribute("id") === "log")) {
+                     cont = false;
+                   } else {
+                     last = nodes.item(i);
+                     assert_equals(as, "bar");
+                   }
+                 }
+
+                 assert_equals(last.nodeName, "FOO");
+                 assert_equals(last.getAttribute("echo"), "");
+                 assert_equals(last.getAttribute("charly"), null);
+                 t.done();
+               }));
+    </script>
+  </body>
+</html>