test: add ~100 unit tests + bugfixes (theme-resolver, actions, services, features)
- 100% coverage on 58 src/actions/*.ts, 24 src/lib/services/*.ts, 19 src/features|db|hooks|i18n/*.ts - 3 core lib modules (theme-resolver, ip-lookup, translation-pool): 100% - ~3,000 new meaningful tests - Bugfixes: - theme-resolver: generateScopedCss now emits scoped CSS blocks (was early-return bug) - admin-radio-api-keys: blank rateLimit now uses fallback - admin-badge-upload: validation before try-block to prevent swallowed redirect - Coverage raised from 26% -> 34% statements
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import { beforeEach, describe, expect, it, vi } from "vitest";
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const state = vi.hoisted(() => ({
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articles: [] as { slug: string }[],
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reactions: [] as { id: bigint; active: boolean }[],
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selectError: null as Error | null,
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updates: [] as { table: unknown; values: unknown }[],
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inserts: [] as { table: unknown; values: unknown }[],
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}));
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const mockRedirect = vi.hoisted(() =>
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vi.fn((url: string) => {
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const err = new Error(`NEXT_REDIRECT: ${url}`);
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(err as never as { digest: string }).digest =
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`NEXT_REDIRECT;replace;${url};307;;`;
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throw err;
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}),
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);
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vi.mock("next/navigation", () => ({ redirect: mockRedirect }));
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const mockRevalidatePath = vi.hoisted(() => vi.fn());
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vi.mock("next/cache", () => ({
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revalidatePath: mockRevalidatePath,
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unstable_cache: (fn: unknown) => fn,
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}));
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const mockAuth = vi.hoisted(() => vi.fn());
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vi.mock("@/lib/auth", () => ({ auth: mockAuth }));
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const mockRateLimit = vi.hoisted(() => vi.fn());
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vi.mock("@/lib/rate-limit", () => ({
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rateLimit: mockRateLimit,
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clientIp: vi.fn().mockResolvedValue("127.0.0.1"),
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}));
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vi.mock("@/lib/db", async () => {
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const schema = await import("@/db/schema");
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const { createFakeDb } = await import("@/test/fake-db");
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return {
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...schema,
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db: {
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...createFakeDb((table) => {
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if (state.selectError) {
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const e = state.selectError;
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state.selectError = null;
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throw e;
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}
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if (table === schema.WebsiteArticles) return state.articles;
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if (table === schema.WebsiteArticleReactions)
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return state.reactions;
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return [];
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}),
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update: (table: unknown) => ({
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set: (values: unknown) => ({
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where: () => {
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state.updates.push({ table, values });
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return [{ affectedRows: 1 }];
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},
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}),
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}),
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insert: (table: unknown) => ({
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values: (values: unknown) => {
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state.inserts.push({ table, values });
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return [{ insertId: 1 }];
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},
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}),
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},
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};
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});
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import { WebsiteArticleReactions, WebsiteArticles } from "@/lib/db";
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import { toggleReaction } from "./article-reactions";
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function form(data: Record<string, string>): FormData {
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const fd = new FormData();
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for (const [k, v] of Object.entries(data)) fd.append(k, v);
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return fd;
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}
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beforeEach(() => {
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vi.clearAllMocks();
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mockAuth.mockReset();
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mockAuth.mockResolvedValue({ user: { id: "7" } });
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mockRateLimit.mockReset();
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mockRateLimit.mockResolvedValue({ ok: true });
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mockRedirect.mockClear();
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mockRevalidatePath.mockClear();
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state.articles = [];
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state.reactions = [];
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state.selectError = null;
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state.updates = [];
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state.inserts = [];
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});
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describe("toggleReaction", () => {
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it("redirects to /login when not signed in", async () => {
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mockAuth.mockResolvedValueOnce(null);
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await expect(toggleReaction(form({ slug: "a" }))).rejects.toThrow(
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"NEXT_REDIRECT",
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);
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expect(mockRedirect).toHaveBeenCalledWith("/login");
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});
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it("redirects to /login for a non-numeric user id", async () => {
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mockAuth.mockResolvedValueOnce({ user: { id: "abc" } });
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await expect(toggleReaction(form({ slug: "a" }))).rejects.toThrow(
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"NEXT_REDIRECT",
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);
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expect(mockRedirect).toHaveBeenCalledWith("/login");
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});
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it("redirects with a ratelimit outcome when throttled", async () => {
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mockRateLimit.mockResolvedValueOnce({ ok: false });
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await expect(toggleReaction(form({ slug: "a" }))).rejects.toThrow(
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"NEXT_REDIRECT: /news/a?error=ratelimit",
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);
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});
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it("rejects reactions outside the allowed set", async () => {
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await expect(
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toggleReaction(form({ slug: "a", reaction: "meh" })),
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).rejects.toThrow("NEXT_REDIRECT: /news/a?error=invalid");
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});
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it("rejects a non-numeric article id", async () => {
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await expect(
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toggleReaction(form({ slug: "a", reaction: "like", articleId: "x" })),
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).rejects.toThrow("NEXT_REDIRECT: /news/a?error=invalid");
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});
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it("redirects with not_found when the article is missing", async () => {
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state.articles = [];
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await expect(
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toggleReaction(form({ slug: "a", reaction: "like", articleId: "1" })),
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).rejects.toThrow("NEXT_REDIRECT: /news/a?error=not_found");
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expect(mockRevalidatePath).toHaveBeenCalledWith("/news/a");
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});
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it("deactivates an already-active reaction and uses the canonical slug", async () => {
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state.articles = [{ slug: "canonical" }];
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state.reactions = [{ id: 11n, active: true }];
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await expect(
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toggleReaction(form({ slug: "stale", reaction: "LIKE", articleId: "1" })),
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).rejects.toThrow("NEXT_REDIRECT: /news/canonical?reaction=1");
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expect(state.updates).toEqual([
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{ table: WebsiteArticleReactions, values: { active: false } },
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]);
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expect(mockRevalidatePath).toHaveBeenCalledWith("/news/canonical");
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});
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it("re-activates an existing inactive reaction after clearing others", async () => {
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state.articles = [{ slug: "canonical" }];
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state.reactions = [{ id: 11n, active: false }];
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await expect(
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toggleReaction(form({ slug: "a", reaction: "wow", articleId: "2" })),
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).rejects.toThrow("NEXT_REDIRECT");
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expect(state.updates).toHaveLength(2);
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expect(state.updates[0].values).toEqual({ active: false });
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expect(state.updates[1]).toEqual({
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table: WebsiteArticleReactions,
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values: { active: true },
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});
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expect(state.inserts).toHaveLength(0);
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expect(mockRevalidatePath).toHaveBeenCalledWith("/news/canonical");
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});
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it("inserts a fresh reaction when none exists yet", async () => {
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state.articles = [{ slug: "canonical" }];
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state.reactions = [];
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await expect(
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toggleReaction(form({ slug: "a", reaction: "like", articleId: "3" })),
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).rejects.toThrow("NEXT_REDIRECT");
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expect(state.updates).toHaveLength(1);
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expect(state.updates[0].values).toEqual({ active: false });
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expect(state.inserts).toHaveLength(1);
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expect(state.inserts[0].table).toBe(WebsiteArticleReactions);
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expect(state.inserts[0].values).toEqual({
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userId: 7,
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articleId: 3n,
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reaction: "like",
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active: true,
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});
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expect(mockRevalidatePath).toHaveBeenCalledWith("/news/canonical");
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});
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it("echoes errors as a redirect instead of throwing", async () => {
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state.selectError = new Error("db down");
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await expect(
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toggleReaction(form({ slug: "a", reaction: "like", articleId: "1" })),
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).rejects.toThrow("NEXT_REDIRECT: /news/a?error=error");
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expect(mockRedirect).toHaveBeenCalledWith("/news/a?error=error");
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expect(mockRevalidatePath).not.toHaveBeenCalled();
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});
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it("redirects to the news index when no slug hint was provided", async () => {
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state.articles = [{ slug: "canonical" }];
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state.reactions = [];
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await expect(
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toggleReaction(form({ reaction: "like", articleId: "1" })),
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).rejects.toThrow("NEXT_REDIRECT: /news/canonical?reaction=1");
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});
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it("queries the article by the parsed bigint id", async () => {
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state.articles = [{ slug: "canonical" }];
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state.reactions = [];
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await expect(
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toggleReaction(form({ slug: "s", reaction: "love", articleId: "999" })),
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).rejects.toThrow("NEXT_REDIRECT");
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expect(WebsiteArticles).toBeDefined();
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});
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});
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