client/setupTests.ts

// fake-indexeddb/auto installs all IndexedDB globals (indexedDB, IDBKeyRange,
// etc.) so that Dexie-based cache tests exercise the real cache code paths
// instead of silently erroring into catch blocks.
import "fake-indexeddb/auto";
import "@testing-library/jest-dom/vitest";
import { vi } from "vitest";

Object.defineProperty(window, "matchMedia", {
  writable: true,
  value: vi.fn().mockImplementation((query) => ({
    matches: false,
    media: query,
    onchange: null,
    addListener: vi.fn(),
    removeListener: vi.fn(),
    addEventListener: vi.fn(),
    removeEventListener: vi.fn(),
    dispatchEvent: vi.fn(),
  })),
});

class ResizeObserverMock {
  observe = vi.fn();
  unobserve = vi.fn();
  disconnect = vi.fn();
}

vi.stubGlobal("ResizeObserver", ResizeObserverMock);

class IntersectionObserverMock {
  root = null;
  rootMargin = "";
  thresholds = [];
  observe = vi.fn();
  unobserve = vi.fn();
  disconnect = vi.fn();
  takeRecords = vi.fn().mockReturnValue([]);
}

vi.stubGlobal("IntersectionObserver", IntersectionObserverMock);

class StorageMock implements Storage {
  private store = new Map<string, string>();

  get length(): number {
    return this.store.size;
  }

  clear(): void {
    this.store.clear();
  }

  getItem(key: string): string | null {
    return this.store.has(key) ? (this.store.get(key) as string) : null;
  }

  setItem(key: string, value: string): void {
    this.store.set(String(key), String(value));
  }

  removeItem(key: string): void {
    this.store.delete(key);
  }

  key(index: number): string | null {
    return Array.from(this.store.keys())[index] ?? null;
  }
}

vi.stubGlobal("localStorage", new StorageMock());
vi.stubGlobal("sessionStorage", new StorageMock());

Object.defineProperty(document, "fonts", {
  writable: true,
  value: {
    addEventListener: vi.fn(),
    removeEventListener: vi.fn(),
  },
});