1 files changed, 25 insertions, 0 deletions
diff --git a/services/sync/tests/unit/test_bookmark_batch_fail.js b/services/sync/tests/unit/test_bookmark_batch_fail.js
new file mode 100644
index 0000000000..9644d730e4
--- /dev/null
+++ b/services/sync/tests/unit/test_bookmark_batch_fail.js
@@ -0,0 +1,25 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+_("Making sure a failing sync reports a useful error");
+// `Service` is used as a global in head_helpers.js.
+// eslint-disable-next-line no-unused-vars
+const { Service } = ChromeUtils.importESModule(
+  "resource://services-sync/service.sys.mjs"
+);
+
+add_bookmark_test(async function run_test(engine) {
+  await engine.initialize();
+  engine._syncStartup = async function () {
+    throw new Error("FAIL!");
+  };
+
+  try {
+    _("Try calling the sync that should throw right away");
+    await engine._sync();
+    do_throw("Should have failed sync!");
+  } catch (ex) {
+    _("Making sure what we threw ended up as the exception:", ex);
+    Assert.equal(ex.message, "FAIL!");
+  }
+});