1 files changed, 37 insertions, 0 deletions
diff --git a/toolkit/components/telemetry/tests/unit/file_UninstallPing.worker.js b/toolkit/components/telemetry/tests/unit/file_UninstallPing.worker.js
new file mode 100644
index 0000000000..fcc8007a2f
--- /dev/null
+++ b/toolkit/components/telemetry/tests/unit/file_UninstallPing.worker.js
@@ -0,0 +1,37 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/. */
+
+/* eslint-env mozilla/chrome-worker */
+
+/* import-globals-from /toolkit/components/workerloader/require.js */
+importScripts("resource://gre/modules/workers/require.js");
+
+const PromiseWorker = require("resource://gre/modules/workers/PromiseWorker.js");
+
+const Agent = {
+  _file: null,
+  open(path) {
+    this._file = IOUtils.openFileForSyncReading(path);
+  },
+  close() {
+    this._file.close();
+  },
+};
+
+// This boilerplate connects the PromiseWorker to the Agent so
+// that messages from the main thread map to methods on the
+// Agent.
+const worker = new PromiseWorker.AbstractWorker();
+worker.dispatch = function (method, args = []) {
+  return Agent[method](...args);
+};
+worker.postMessage = function (result, ...transfers) {
+  self.postMessage(result, ...transfers);
+};
+worker.close = function () {
+  self.close();
+};
+self.addEventListener("message", msg => worker.handleMessage(msg));
+self.addEventListener("unhandledrejection", function (error) {
+  throw error.reason;
+});