1 files changed, 29 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/webappapis/scripting/event-loops/fully_active_document.window.js b/testing/web-platform/tests/html/webappapis/scripting/event-loops/fully_active_document.window.js
new file mode 100644
index 0000000000..950a8a29ee
--- /dev/null
+++ b/testing/web-platform/tests/html/webappapis/scripting/event-loops/fully_active_document.window.js
@@ -0,0 +1,29 @@
+async_test(t => {
+  const frame = document.body.appendChild(document.createElement("iframe"));
+  t.add_cleanup(() => frame.remove());
+
+  frame.onload = t.step_func(() => {
+    // Right now the doc of the iframe inside "frame" is still "fully-active".
+    // Navigate parent away, making the child iframe's doc "active", not "fully-active".
+    frame.contentWindow.location = "/common/blank.html";
+
+    frame.onload = t.step_func(() => {
+      // The child iframe's doc is "active", not "fully-active", and should not receive the storage notification.
+      sessionStorage.setItem('myCat', 'Tom');
+      t.step_timeout(() => {
+        // The child iframe's hasn't received the storage notification.
+        assert_equals(sessionStorage.getItem("Received storage event"), null);
+        frame.contentWindow.history.go(-1);
+        t.step_timeout(() => {
+          // Now The child iframe's doc is "fully-active" again,
+          // the previously not run storage task should now have been run.
+          assert_equals(sessionStorage.getItem("Received storage event"), "true");
+          t.done();
+        }, 1000);
+      }, 1000);
+    });
+  });
+
+  frame.src = "resources/page-with-frame.html";
+}, "Tasks for documents that are not fully active are stored, and run when the documents becomes fully-active");
+