1 files changed, 16 insertions, 0 deletions
diff --git a/dom/serviceworkers/test/source_message_posting_worker.js b/dom/serviceworkers/test/source_message_posting_worker.js
new file mode 100644
index 0000000000..8ca6246c51
--- /dev/null
+++ b/dom/serviceworkers/test/source_message_posting_worker.js
@@ -0,0 +1,16 @@
+onmessage = function (e) {
+  if (!e.source) {
+    dump("ERROR: message doesn't have a source.");
+  }
+
+  if (!(e instanceof ExtendableMessageEvent)) {
+    e.source.postMessage("ERROR. event is not an extendable message event.");
+  }
+
+  // The client should be a window client
+  if (e.source instanceof WindowClient) {
+    e.source.postMessage(e.data);
+  } else {
+    e.source.postMessage("ERROR. source is not a window client.");
+  }
+};