snapme

1import { describe, expect, it } from "vitest"
2
3import { LAYOUTS, type LayoutId } from "@/lib/layouts"
4import {
5  ghostSlotFor,
6  hostSlotIndices,
7  relaySlotsFor,
8} from "@/lib/relaySlots"
9
10/* PRD §7.3 (SE-01, SE-04, SE-05, SE-08) dan MILESTONES M8: pembagian slot
11   estafet. Fungsi murni, jadi diuji tanpa kamera maupun basis data. */
12
13describe("pembagian slot estafet", () => {
14  it("pembuat mengisi indeks genap, teman indeks ganjil, di semua layout", () => {
15    function indeks(owner: "host" | "guest", layoutId: LayoutId): number[] {
16      return relaySlotsFor(layoutId)
17        .filter((slot) => slot.owner === owner)
18        .map((slot) => slot.index)
19    }
20
21    expect(hostSlotIndices("strip-4")).toEqual([0, 2])
22    expect(indeks("guest", "strip-4")).toEqual([1, 3])
23
24    expect(hostSlotIndices("strip-3")).toEqual([0, 2])
25    expect(indeks("guest", "strip-3")).toEqual([1])
26
27    expect(hostSlotIndices("grid-2x2")).toEqual([0, 2])
28    expect(indeks("guest", "grid-2x2")).toEqual([1, 3])
29  })
30
31  it("setiap layout terbagi habis tanpa slot yang hilang atau dobel", () => {
32    for (const [id, layout] of Object.entries(LAYOUTS)) {
33      const slots = relaySlotsFor(id as keyof typeof LAYOUTS)
34      expect(slots).toHaveLength(layout.shotCount)
35      expect(slots.map((slot) => slot.index)).toEqual(
36        Array.from({ length: layout.shotCount }, (_, index) => index)
37      )
38      const host = slots.filter((slot) => slot.owner === "host")
39      const guest = slots.filter((slot) => slot.owner === "guest")
40      expect(host.length + guest.length).toBe(layout.shotCount)
41      /* SE-01: tombol estafet baru muncul setelah minimal setengah slot
42         terisi, dan pembuat selalu mengisi tepat setengahnya. */
43      expect(host.length).toBeGreaterThanOrEqual(layout.shotCount / 2)
44    }
45  })
46
47  it("bayangan pose teman selalu slot pembuat tepat sebelumnya", () => {
48    expect(ghostSlotFor(0)).toBeNull()
49    expect(ghostSlotFor(1)).toBe(0)
50    expect(ghostSlotFor(2)).toBe(1)
51    expect(ghostSlotFor(3)).toBe(2)
52  })
53})
54