1 files changed, 21 insertions, 0 deletions
diff --git a/testing/web-platform/tests/portals/resources/portal-activate-event-portal.html b/testing/web-platform/tests/portals/resources/portal-activate-event-portal.html
new file mode 100644
index 0000000000..6de5aafca7
--- /dev/null
+++ b/testing/web-platform/tests/portals/resources/portal-activate-event-portal.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<title>Tests that the PortalActivateEvent is dispatched when a portal is activated</title>
+<script>
+  var test = (new URL(location)).searchParams.get("test");
+
+  function portalActivate(e) {
+    var bc = new BroadcastChannel("test-" + test);
+    bc.postMessage("passed");
+    bc.close();
+  }
+
+  if (test == "bodyeventhandler") {
+    document.write('<body onportalactivate="portalActivate()"></body>');
+  } else if (test == "eventhandler") {
+    window.onportalactivate = portalActivate;
+  } else if (test == "eventlistener") {
+    window.addEventListener("portalactivate", portalActivate);
+  }
+
+  window.portalHost.postMessage("loaded");
+</script>