93 lines
4.0 KiB
TypeScript
93 lines
4.0 KiB
TypeScript
import { describe, it, expect, beforeAll } from "vitest";
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// The R7.5 guard: lib/api.ts is a spread-only façade over per-domain slice modules. These tests
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// mechanise the two invariants that make that structure safe — so a future edit that reintroduces
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// the interleave (a method dropped into two slices → a silent last-wins spread override) or bloats
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// the barrel (a method defined inline instead of in a domain module) fails CI instead of shipping.
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//
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// Scope, on purpose: this covers RUNTIME method-key collisions — the only *silent* failure mode,
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// since tsc does not flag overlapping spread keys. It deliberately does NOT cover exported-TYPE-name
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// clashes across slices (two slices exporting the same interface name): types are erased at runtime
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// so they're invisible here, and that case is already build-caught — the barrel's `export type *`
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// makes the ambiguous name a downstream tsc "no exported member" error, so nothing ships. Left to
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// tsc rather than re-checked by a fragile source parse.
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type Slice = Record<string, unknown>;
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// Names line up with the modules below; kept as a list so the wiring stays a single source.
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const SLICE_MODULES = [
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["accountApi", () => import("./account")],
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["authApi", () => import("./auth")],
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["setupApi", () => import("./setup")],
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["feedApi", () => import("./feed")],
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["channelsApi", () => import("./channels")],
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["syncApi", () => import("./sync")],
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["playlistsApi", () => import("./playlists")],
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["tagsApi", () => import("./tags")],
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["notificationsApi", () => import("./notifications")],
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["savedViewsApi", () => import("./savedViews")],
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["quotaApi", () => import("./quota")],
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["adminApi", () => import("./admin")],
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["plexApi", () => import("./plex")],
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["messagingApi", () => import("./messaging")],
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["downloadsApi", () => import("./downloads")],
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] as const;
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let api: Slice;
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const slices: Record<string, Slice> = {};
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beforeAll(async () => {
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// The runtime api graph pulls i18n at module-load, which reads localStorage/navigator. Under
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// vitest's node env (no jsdom — see vitest.config.ts) stub the minimum so the import succeeds.
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if (typeof globalThis.localStorage === "undefined") {
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const store = new Map<string, string>();
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globalThis.localStorage = {
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getItem: (k: string) => store.get(k) ?? null,
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setItem: (k: string, v: string) => void store.set(k, String(v)),
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removeItem: (k: string) => void store.delete(k),
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clear: () => store.clear(),
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key: (i: number) => [...store.keys()][i] ?? null,
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get length() {
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return store.size;
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},
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} as Storage;
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}
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if (typeof globalThis.navigator === "undefined") {
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globalThis.navigator = { language: "en" } as Navigator;
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}
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if (typeof globalThis.document === "undefined") {
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globalThis.document = { documentElement: {} } as Document;
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}
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for (const [name, load] of SLICE_MODULES) {
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const mod = (await load()) as Record<string, Slice>;
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const slice = mod[name];
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if (!slice) throw new Error(`slice module did not export ${name}`);
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slices[name] = slice;
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}
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api = ((await import("../api")) as { api: Slice }).api;
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});
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describe("api façade is a collision-free spread of domain slices", () => {
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it("defines no method name in more than one slice (object spread would silently drop one)", () => {
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const owner = new Map<string, string>();
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const collisions: string[] = [];
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for (const [sliceName, slice] of Object.entries(slices)) {
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for (const key of Object.keys(slice)) {
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const prev = owner.get(key);
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if (prev) collisions.push(`"${key}" is defined in both ${prev} and ${sliceName}`);
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else owner.set(key, sliceName);
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}
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}
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expect(collisions).toEqual([]);
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});
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it("exposes exactly the union of the slices — nothing added inline in the barrel, nothing lost", () => {
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const union = new Set<string>();
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for (const slice of Object.values(slices)) {
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for (const key of Object.keys(slice)) union.add(key);
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}
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expect(new Set(Object.keys(api))).toEqual(union);
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});
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});
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