1 files changed, 23 insertions, 0 deletions
diff --git a/toolkit/components/crashmonitor/test/unit/test_invalid_file.js b/toolkit/components/crashmonitor/test/unit/test_invalid_file.js
new file mode 100644
index 0000000000..f64fc9183c
--- /dev/null
+++ b/toolkit/components/crashmonitor/test/unit/test_invalid_file.js
@@ -0,0 +1,23 @@
+/* -*- 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 invalid data
+ */
+add_task(async function test_invalid_file() {
+  // Write bogus data to checkpoint file
+  let data = "1234";
+  await IOUtils.writeUTF8(sessionCheckpointsPath, data, {
+    tmpPath: sessionCheckpointsPath + ".tmp",
+  });
+
+  // An invalid file will cause |init| to return null
+  let status = await CrashMonitor.init();
+  Assert.ok(!!(status === null));
+
+  // and |previousCheckpoints| will be null
+  let checkpoints = await CrashMonitor.previousCheckpoints;
+  Assert.ok(!!(checkpoints === null));
+});