1 files changed, 59 insertions, 0 deletions
diff --git a/services/sync/tests/unit/test_tracker_addChanged.js b/services/sync/tests/unit/test_tracker_addChanged.js
new file mode 100644
index 0000000000..7f510794fc
--- /dev/null
+++ b/services/sync/tests/unit/test_tracker_addChanged.js
@@ -0,0 +1,59 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+const { Service } = ChromeUtils.importESModule(
+  "resource://services-sync/service.sys.mjs"
+);
+
+add_task(async function test_tracker_basics() {
+  let tracker = new LegacyTracker("Tracker", Service);
+
+  let id = "the_id!";
+
+  _("Make sure nothing exists yet..");
+  let changes = await tracker.getChangedIDs();
+  Assert.equal(changes[id], null);
+
+  _("Make sure adding of time 0 works");
+  await tracker.addChangedID(id, 0);
+  changes = await tracker.getChangedIDs();
+  Assert.equal(changes[id], 0);
+
+  _("A newer time will replace the old 0");
+  await tracker.addChangedID(id, 10);
+  changes = await tracker.getChangedIDs();
+  Assert.equal(changes[id], 10);
+
+  _("An older time will not replace the newer 10");
+  await tracker.addChangedID(id, 5);
+  changes = await tracker.getChangedIDs();
+  Assert.equal(changes[id], 10);
+
+  _("Adding without time defaults to current time");
+  await tracker.addChangedID(id);
+  changes = await tracker.getChangedIDs();
+  Assert.ok(changes[id] > 10);
+});
+
+add_task(async function test_tracker_persistence() {
+  let tracker = new LegacyTracker("Tracker", Service);
+  let id = "abcdef";
+
+  let promiseSave = new Promise((resolve, reject) => {
+    let save = tracker._storage._save;
+    tracker._storage._save = function () {
+      save.call(tracker._storage).then(resolve, reject);
+    };
+  });
+
+  await tracker.addChangedID(id, 5);
+
+  await promiseSave;
+
+  _("IDs saved.");
+  const changes = await tracker.getChangedIDs();
+  Assert.equal(5, changes[id]);
+
+  let json = await Utils.jsonLoad(["changes", "tracker"], tracker);
+  Assert.equal(5, json[id]);
+});