1 files changed, 33 insertions, 0 deletions
diff --git a/toolkit/components/filewatcher/tests/xpcshell/test_watch_resource.js b/toolkit/components/filewatcher/tests/xpcshell/test_watch_resource.js
new file mode 100644
index 0000000000..355624fff1
--- /dev/null
+++ b/toolkit/components/filewatcher/tests/xpcshell/test_watch_resource.js
@@ -0,0 +1,33 @@
+/* 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";
+
+function run_test() {
+  // Set up profile. We will use profile path create some test files
+  do_get_profile();
+
+  // Start executing the tests
+  run_next_test();
+}
+
+/**
+ * Test watching non-existing path
+ */
+add_task(async function test_watching_non_existing() {
+  let notExistingDir = OS.Path.join(
+    OS.Constants.Path.profileDir,
+    "absolutelyNotExisting"
+  );
+
+  // Instantiate the native watcher.
+  let watcher = makeWatcher();
+  let error = await new Promise((resolve, reject) => {
+    // Try watch a path which doesn't exist.
+    watcher.addPath(notExistingDir, reject, resolve);
+
+    // Wait until the watcher informs us that there was an error.
+  });
+  Assert.equal(error, Cr.NS_ERROR_FILE_NOT_FOUND);
+});