1 files changed, 50 insertions, 0 deletions
diff --git a/testing/web-platform/mozilla/tests/focus/support/focus-next-tick-before-iframe-loaded-different-site-outer.sub.html b/testing/web-platform/mozilla/tests/focus/support/focus-next-tick-before-iframe-loaded-different-site-outer.sub.html
new file mode 100644
index 0000000000..83a48e303d
--- /dev/null
+++ b/testing/web-platform/mozilla/tests/focus/support/focus-next-tick-before-iframe-loaded-different-site-outer.sub.html
@@ -0,0 +1,50 @@
+<!DOCTYPE html>
+<html>
+<head>
+<title>focus() from next tick before iframe loaded different site</title>
+</head>
+<body>
+<script>
+var pendingTimeout = false;
+window.onmessage = function(e) {
+    if (e.data == "tick") {
+        iframe.focus();
+        if (document.activeElement != iframe) {
+            if (pendingTimeout) {
+                clearTimeout(pendingTimeout);
+            }
+            pendingTimeout = true;
+            opener.postMessage("FAIL activeElement", "*");
+        }
+        return;
+    }
+
+    if (e.data == "onload") {
+        if (pendingTimeout) {
+            return;
+        }
+        pendingTimeout = opener.step_timeout(function() {
+            opener.postMessage("FAIL missing onfocus", "*");
+        }, 2000);
+        return;
+    }
+    if (pendingTimeout) {
+        clearTimeout(pendingTimeout);
+    }
+    pendingTimeout = true;
+    if (e.data == "onfocus") {
+        // Test not upstreamed, because this even is a Firefoxism
+        // https://github.com/whatwg/html/issues/6209
+        opener.postMessage("PASS", "*");
+        return;
+    }
+    opener.postMessage("FAIL " + e.data, "*");
+}
+
+var iframe = document.createElement("iframe");
+iframe.src = "http://{{hosts[alt][www]}}:{{ports[http][0]}}/_mozilla/focus/support/focus-next-tick-before-iframe-loaded-different-site-inner.html";
+document.body.appendChild(iframe);
+window.postMessage("tick", "*");
+</script>
+</body>
+</html>