1 files changed, 27 insertions, 0 deletions
diff --git a/toolkit/components/filewatcher/tests/xpcshell/head.js b/toolkit/components/filewatcher/tests/xpcshell/head.js
new file mode 100644
index 0000000000..57c777feb4
--- /dev/null
+++ b/toolkit/components/filewatcher/tests/xpcshell/head.js
@@ -0,0 +1,27 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+ChromeUtils.import("resource://gre/modules/osfile.jsm", this);
+ChromeUtils.import("resource://gre/modules/Promise.jsm", this);
+
+function makeWatcher() {
+  let watcher = Cc[
+    "@mozilla.org/toolkit/filewatcher/native-file-watcher;1"
+  ].getService(Ci.nsINativeFileWatcherService);
+  return watcher;
+}
+
+function promiseAddPath(watcher, resource, onChange = null, onError = null) {
+  return new Promise(resolve =>
+    watcher.addPath(resource, onChange, onError, resolve)
+  );
+}
+
+function promiseRemovePath(watcher, resource, onChange = null, onError = null) {
+  return new Promise(resolve =>
+    watcher.removePath(resource, onChange, onError, resolve)
+  );
+}