1 files changed, 30 insertions, 0 deletions
diff --git a/testing/web-platform/tests/cookies/cookie-enabled-noncookie-frame.html b/testing/web-platform/tests/cookies/cookie-enabled-noncookie-frame.html
new file mode 100644
index 0000000000..2dbbc0bbdc
--- /dev/null
+++ b/testing/web-platform/tests/cookies/cookie-enabled-noncookie-frame.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<head>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+</head>
+<body>
+  <script>
+    var t = async_test("navigator.cookieEnabled behavior on frames without cookie access");
+    window.onmessage = t.step_func_done(ev => {
+      // Surprisingly, the legacy behavior here is to return true; this actually
+      // does match the spec definition since false is supposed to be returned
+      // when a document.cookie write is ignored --- and here it would throw
+      // a security exception, not be ignored.
+      assert_true(ev.data);
+    });
+
+    t.step(() => {
+      var iframe = document.createElement("iframe");
+      iframe.sandbox = "allow-scripts";
+      iframe.srcdoc = "<scr" + "ipt>" +
+            "window.onmessage = function() {" +
+            "  parent.postMessage(navigator.cookieEnabled, '*'); " +
+            "}</scr" + "ipt>";
+      iframe.onload = function() {
+        iframe.contentWindow.postMessage({}, "*");
+      }
+      document.body.appendChild(iframe);
+    });
+  </script>
+</body>