1 files changed, 24 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 0000000000..2a15d25a08
--- /dev/null
+++ b/toolkit/components/crashmonitor/test/unit/test_valid_file.js
@@ -0,0 +1,24 @@
+/* -*- 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(async function test_valid_file() {
+  // Write valid data to checkpoint file
+  await IOUtils.writeJSON(
+    sessionCheckpointsPath,
+    { "final-ui-startup": true },
+    {
+      tmpPath: sessionCheckpointsPath + ".tmp",
+    }
+  );
+
+  CrashMonitor.init();
+  let checkpoints = await CrashMonitor.previousCheckpoints;
+
+  Assert.ok(checkpoints["final-ui-startup"]);
+  Assert.equal(Object.keys(checkpoints).length, 1);
+});