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1import { describe, expect, it } from "vitest";
2
3import { mergeNotifications } from "@/modules/system/components/status-bar/use-status-bar-data";
4import type { Notification } from "@/modules/system/components/status-bar/types";
5import type { NotificationRecord } from "@/lib/shared/contracts/notifications";
6
7function persisted(id: string, title: string, createdAt: string): NotificationRecord {
8  return {
9    id,
10    title,
11    body: "",
12    kind: "info",
13    read: false,
14    createdAt,
15  } as NotificationRecord;
16}
17
18function ephemeral(id: string, title: string, createdAt: string): Notification {
19  return { id, title, message: "", time: "", createdAt, read: true };
20}
21
22describe("mergeNotifications", () => {
23  it("orders the two sources together, not one after the other", () => {
24    // Each list arrives sorted, so concatenating them left yesterday's app
25    // events above a snapshot from minutes ago.
26    const merged = mergeNotifications(
27      [
28        persisted("a", "App Redeployed", "2026-09-09T20:25:00.000Z"),
29        persisted("b", "App Installed", "2026-09-09T20:23:00.000Z"),
30      ],
31      [
32        ephemeral("system-snapshot", "System Snapshot", "2026-09-10T21:49:00.000Z"),
33        ephemeral("session", "Active Session", "2026-09-10T21:48:00.000Z"),
34      ],
35    );
36
37    expect(merged.map((item) => item.title)).toEqual([
38      "System Snapshot",
39      "Active Session",
40      "App Redeployed",
41      "App Installed",
42    ]);
43  });
44
45  it("lets the persisted copy win when both sources carry an id", () => {
46    const merged = mergeNotifications(
47      [persisted("shared", "From the server", "2026-09-10T10:00:00.000Z")],
48      [ephemeral("shared", "From the client", "2026-09-10T11:00:00.000Z")],
49    );
50
51    expect(merged).toHaveLength(1);
52    expect(merged[0].title).toBe("From the server");
53  });
54
55  it("keeps the newest when there are more than fit", () => {
56    const many = Array.from({ length: 25 }, (_, index) =>
57      ephemeral(`e${index}`, `Event ${index}`, new Date(2026, 0, 1, 0, index).toISOString()),
58    );
59
60    const merged = mergeNotifications([], many);
61
62    expect(merged).toHaveLength(20);
63    expect(merged[0].title).toBe("Event 24");
64  });
65});
66