1 files changed, 57 insertions, 0 deletions
diff --git a/services/settings/test/unit/test_remote_settings_dump_lastmodified.js b/services/settings/test/unit/test_remote_settings_dump_lastmodified.js
new file mode 100644
index 0000000000..fd18605243
--- /dev/null
+++ b/services/settings/test/unit/test_remote_settings_dump_lastmodified.js
@@ -0,0 +1,57 @@
+"use strict";
+
+const { Utils } = ChromeUtils.importESModule(
+  "resource://services-settings/Utils.sys.mjs"
+);
+
+Cu.importGlobalProperties(["fetch"]);
+
+async function getLocalDumpLastModified(bucket, collection) {
+  let res;
+  try {
+    res = await fetch(
+      `resource://app/defaults/settings/${bucket}/${collection}.json`
+    );
+  } catch (e) {
+    return -1;
+  }
+  const { timestamp } = await res.json();
+  ok(timestamp >= 0, `${bucket}/${collection} dump has timestamp`);
+  return timestamp;
+}
+
+add_task(async function lastModified_of_non_existing_dump() {
+  ok(!Utils._dumpStats, "_dumpStats not initialized");
+  equal(
+    await Utils.getLocalDumpLastModified("did not", "exist"),
+    -1,
+    "A non-existent dump has value -1"
+  );
+  ok(Utils._dumpStats, "_dumpStats was initialized");
+
+  ok("did not/exist" in Utils._dumpStats, "cached non-existing dump result");
+  delete Utils._dumpStats["did not/exist"];
+});
+
+add_task(async function lastModified_summary_is_correct() {
+  ok(!!Object.keys(Utils._dumpStats).length, "Contains summary of dumps");
+
+  let checked = 0;
+  for (let [identifier, lastModified] of Object.entries(Utils._dumpStats)) {
+    let [bucket, collection] = identifier.split("/");
+    let actual = await getLocalDumpLastModified(bucket, collection);
+    if (actual < 0) {
+      info(`${identifier} has no dump, skip.`);
+      continue;
+    }
+    info(`Checking correctness of ${identifier}`);
+    equal(
+      await Utils.getLocalDumpLastModified(bucket, collection),
+      lastModified,
+      `Expected last_modified value for ${identifier}`
+    );
+    equal(lastModified, actual, `last_modified should match collection`);
+    checked++;
+  }
+  ok(checked > 0, "At least one dump was packaged and checked.");
+});