test(status): add coverage for update summary + timestamps

src/logging/timestamps.test.ts

@@ -0,0 +1,58 @@
+import { describe, expect, it } from "vitest";
+import { formatLocalIsoWithOffset } from "./timestamps.js";
+
+function buildFakeDate(parts: {
+  year: number;
+  month: number;
+  day: number;
+  hour: number;
+  minute: number;
+  second: number;
+  millisecond: number;
+  timezoneOffsetMinutes: number;
+}): Date {
+  return {
+    getFullYear: () => parts.year,
+    getMonth: () => parts.month - 1,
+    getDate: () => parts.day,
+    getHours: () => parts.hour,
+    getMinutes: () => parts.minute,
+    getSeconds: () => parts.second,
+    getMilliseconds: () => parts.millisecond,
+    getTimezoneOffset: () => parts.timezoneOffsetMinutes,
+  } as unknown as Date;
+}
+
+describe("formatLocalIsoWithOffset", () => {
+  it("formats positive offset with millisecond padding", () => {
+    const value = formatLocalIsoWithOffset(
+      buildFakeDate({
+        year: 2026,
+        month: 1,
+        day: 2,
+        hour: 3,
+        minute: 4,
+        second: 5,
+        millisecond: 6,
+        timezoneOffsetMinutes: -150, // UTC+02:30
+      }),
+    );
+    expect(value).toBe("2026-01-02T03:04:05.006+02:30");
+  });
+
+  it("formats negative offset", () => {
+    const value = formatLocalIsoWithOffset(
+      buildFakeDate({
+        year: 2026,
+        month: 12,
+        day: 31,
+        hour: 23,
+        minute: 59,
+        second: 58,
+        millisecond: 321,
+        timezoneOffsetMinutes: 300, // UTC-05:00
+      }),
+    );
+    expect(value).toBe("2026-12-31T23:59:58.321-05:00");
+  });
+});