Test that createContextualFragment works on a variety of contexts

As discovered and discussed in whatwg/html#2221 (comment) , some browsers have a blocklist here that seems historical and not supported by any spec.

The same blocklist is shared by innerText (tested in #3491) and outerText (not tested as it's not yet standard).

domparsing/createContextualFragment.html

@@ -84,6 +84,45 @@
         assert_true(passed, "Fragment created and added to document, should run");
 }, "<script>s should be run when appended to the document (but not before)");
 
+// Historical bugs in browsers; see https://github.com/whatwg/html/issues/2222
+
+[
+        // Void
+        "area",
+        "base",
+        "basefont",
+        "bgsound",
+        "br",
+        "col",
+        "embed",
+        "frame",
+        "hr",
+        "img",
+        "input",
+        "keygen",
+        "link",
+        "meta",
+        "param",
+        "source",
+        "track",
+        "wbr",
+
+        // Historical
+        "menuitem",
+        "image"
+].forEach(name => {
+        test(() => {
+                const range = document.createRange();
+                const contextNode = document.createElement(name);
+                const selectedNode = document.createElement("div");
+                contextNode.appendChild(selectedNode);
+                range.selectNode(selectedNode);
+
+                range.createContextualFragment("some text");
+        }, `createContextualFragment should work even when the context is <${name}>`);
+});
+
+
 // Now that we've established basic sanity, let's do equivalence tests.  Those
 // are easier to write anyway.
 function testEquivalence(element1, fragment1, element2, fragment2) {