1 files changed, 20 insertions, 0 deletions
diff --git a/toolkit/components/crashmonitor/test/unit/test_valid_file.js b/toolkit/components/crashmonitor/test/unit/test_valid_file.js
new file mode 100644
index 000000000..d2f214cc0
--- /dev/null
+++ b/toolkit/components/crashmonitor/test/unit/test_valid_file.js
@@ -0,0 +1,20 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* 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/. */
+
+/**
+ * Test with sessionCheckpoints.json containing valid data
+ */
+add_task(function* test_valid_file() {
+  // Write valid data to checkpoint file
+  let data = JSON.stringify({"final-ui-startup": true});
+  yield OS.File.writeAtomic(sessionCheckpointsPath, data,
+                            {tmpPath: sessionCheckpointsPath + ".tmp"});
+
+  CrashMonitor.init();
+  let checkpoints = yield CrashMonitor.previousCheckpoints;
+
+  do_check_true(checkpoints["final-ui-startup"]);
+  do_check_eq(Object.keys(checkpoints).length, 1);
+});