1 files changed, 37 insertions, 0 deletions
diff --git a/testing/web-platform/tests/fullscreen/api/document-fullscreen-enabled-setting-allowfullscreen.sub.html b/testing/web-platform/tests/fullscreen/api/document-fullscreen-enabled-setting-allowfullscreen.sub.html
new file mode 100644
index 0000000000..4894fa0663
--- /dev/null
+++ b/testing/web-platform/tests/fullscreen/api/document-fullscreen-enabled-setting-allowfullscreen.sub.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<title>Document#fullscreenEnabled setting allowfullscreen after load and then navigating</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+async_test((t) => {
+  const iframe = document.createElement('iframe');
+  // no allowfullscreen attribute
+
+  let i = 0;
+
+  const path = location.pathname.substring(0, location.pathname.lastIndexOf('/') + 1);
+  iframe.src = "http://{{hosts[][]}}:{{ports[http][0]}}" + path + "resources/echo-fullscreenEnabled.html";
+  iframe.onload = t.step_func(() => {
+    if (i === 0) {
+      iframe.allowFullscreen = true;
+    }
+    iframe.contentWindow.postMessage('What is document.fullscreenEnabled?', '*');
+  });
+
+  window.onmessage = t.step_func((e) => {
+    i++;
+    if (i === 1) {
+      assert_false(e.data, 'document.fullscreenEnabled in the iframe, before navigation');
+
+      // Navigate the iframe. This will fire a second 'load' event on the iframe.
+      iframe.contentWindow.location.href = iframe.src + '?2';
+    } else {
+      assert_true(e.data, 'document.fullscreenEnabled in the iframe, after navigation');
+      t.done();
+    }
+  });
+
+  document.body.appendChild(iframe);
+});
+</script>