1 files changed, 15 insertions, 0 deletions
diff --git a/testing/web-platform/tests/service-workers/service-worker/ServiceWorkerGlobalScope/resources/postmessage-ping-worker.js b/testing/web-platform/tests/service-workers/service-worker/ServiceWorkerGlobalScope/resources/postmessage-ping-worker.js
new file mode 100644
index 0000000000..ebb1eccce2
--- /dev/null
+++ b/testing/web-platform/tests/service-workers/service-worker/ServiceWorkerGlobalScope/resources/postmessage-ping-worker.js
@@ -0,0 +1,15 @@
+self.addEventListener('message', function(event) {
+    if ('port' in event.data) {
+      var port = event.data.port;
+
+      var channel = new MessageChannel();
+      channel.port1.onmessage = function(event) {
+        if ('pong' in event.data)
+          port.postMessage(event.data.pong);
+      };
+
+      // Send a ping message to another service worker.
+      self.registration.waiting.postMessage({ping: channel.port2},
+                                            [channel.port2]);
+    }
+  });