1 files changed, 18 insertions, 0 deletions
diff --git a/dom/serviceworkers/test/abrupt_completion_worker.js b/dom/serviceworkers/test/abrupt_completion_worker.js
new file mode 100644
index 0000000000..7afebc6d45
--- /dev/null
+++ b/dom/serviceworkers/test/abrupt_completion_worker.js
@@ -0,0 +1,18 @@
+function setMessageHandler(response) {
+  onmessage = e => {
+    e.source.postMessage(response);
+  };
+}
+
+setMessageHandler("handler-before-throw");
+
+// importScripts will throw when the ServiceWorker is past the "intalling" state.
+importScripts(`empty.js?${Date.now()}`);
+
+// When importScripts throws an uncaught exception, these calls should never be
+// made and the message handler should remain responding "handler-before-throw".
+setMessageHandler("handler-after-throw");
+
+// There needs to be a fetch handler to avoid the no-fetch optimizaiton,
+// which will skip starting up this worker.
+onfetch = e => e.respondWith(new Response("handler-after-throw"));