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/**
* @vitest-environment jsdom
*/
import "fake-indexeddb/auto";
import { cleanup, render, screen } from "@testing-library/react";
import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
import { OfflineBanner } from "./OfflineBanner";
// Mock the useSync hook
const mockUseSync = vi.fn();
vi.mock("../stores", () => ({
useSync: () => mockUseSync(),
}));
describe("OfflineBanner", () => {
beforeEach(() => {
vi.clearAllMocks();
});
afterEach(() => {
cleanup();
});
it("renders nothing when online", () => {
mockUseSync.mockReturnValue({
isOnline: true,
pendingCount: 0,
});
render(<OfflineBanner />);
expect(screen.queryByTestId("offline-banner")).toBeNull();
});
it("renders banner when offline", () => {
mockUseSync.mockReturnValue({
isOnline: false,
pendingCount: 0,
});
render(<OfflineBanner />);
const banner = screen.getByTestId("offline-banner");
expect(banner).toBeDefined();
expect(
screen.getByText(/You're offline. Changes will sync when you reconnect./),
).toBeDefined();
});
it("displays pending count when offline with pending changes", () => {
mockUseSync.mockReturnValue({
isOnline: false,
pendingCount: 5,
});
render(<OfflineBanner />);
expect(screen.getByTestId("offline-pending-count")).toBeDefined();
expect(screen.getByText("(5 pending)")).toBeDefined();
});
it("does not display pending count when there are no pending changes", () => {
mockUseSync.mockReturnValue({
isOnline: false,
pendingCount: 0,
});
render(<OfflineBanner />);
expect(screen.queryByTestId("offline-pending-count")).toBeNull();
});
it("has correct accessibility attributes", () => {
mockUseSync.mockReturnValue({
isOnline: false,
pendingCount: 0,
});
render(<OfflineBanner />);
const banner = screen.getByTestId("offline-banner");
// <output> element has implicit role="status", so we check it's an output element
expect(banner.tagName.toLowerCase()).toBe("output");
expect(banner.getAttribute("aria-live")).toBe("polite");
});
});
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