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import React from 'react';
import '@testing-library/jest-dom';
import { render, screen, waitFor, fireEvent } from '@testing-library/react';
import { describe, it, expect, vi, beforeEach } from 'vitest';
import FeedList from './FeedList';
import { BrowserRouter } from 'react-router-dom';
describe('FeedList Component', () => {
beforeEach(() => {
vi.resetAllMocks();
global.fetch = vi.fn();
});
it('renders loading state initially', () => {
(global.fetch as any).mockImplementation(() => new Promise(() => { }));
render(
<BrowserRouter>
{/* @ts-ignore */}
<FeedList theme="light" setTheme={() => { }} />
</BrowserRouter>
);
expect(screen.getByText(/loading feeds/i)).toBeInTheDocument();
});
it('renders list of feeds', async () => {
const mockFeeds = [
{ _id: 1, title: 'Feed One', url: 'http://example.com/rss', web_url: 'http://example.com', category: 'Tech' },
{ _id: 2, title: 'Feed Two', url: 'http://test.com/rss', web_url: 'http://test.com', category: 'News' },
];
(global.fetch as any).mockImplementation((url: string) => {
if (url.includes('/api/feed/')) {
return Promise.resolve({
ok: true,
json: async () => mockFeeds,
});
}
if (url.includes('/api/tag')) {
return Promise.resolve({
ok: true,
json: async () => [{ title: 'Tech' }],
});
}
return Promise.reject(new Error(`Unknown URL: ${url}`));
});
render(
<BrowserRouter>
{/* @ts-ignore */}
<FeedList theme="light" setTheme={() => { }} />
</BrowserRouter>
);
await waitFor(() => {
expect(screen.queryByText(/loading feeds/i)).not.toBeInTheDocument();
});
// Expand feeds
fireEvent.click(screen.getByText(/feeds/i, { selector: 'h2' }));
await waitFor(() => {
expect(screen.getByText('Feed One')).toBeInTheDocument();
expect(screen.getByText('Feed Two')).toBeInTheDocument();
const techElements = screen.getAllByText('Tech');
expect(techElements.length).toBeGreaterThan(0);
});
});
it('handles fetch error', async () => {
(global.fetch as any).mockImplementation(() => Promise.reject(new Error('API Error')));
render(
<BrowserRouter>
{/* @ts-ignore */}
<FeedList theme="light" setTheme={() => { }} />
</BrowserRouter>
);
await waitFor(() => {
expect(screen.getByText(/error: api error/i)).toBeInTheDocument();
});
});
it('handles empty feed list', async () => {
(global.fetch as any).mockImplementation((url: string) => {
if (url.includes('/api/feed/')) {
return Promise.resolve({
ok: true,
json: async () => [],
});
}
if (url.includes('/api/tag')) {
return Promise.resolve({
ok: true,
json: async () => [],
});
}
return Promise.reject(new Error(`Unknown URL: ${url}`));
});
render(
<BrowserRouter>
{/* @ts-ignore */}
<FeedList theme="light" setTheme={() => { }} />
</BrowserRouter>
);
await waitFor(() => {
expect(screen.queryByText(/loading feeds/i)).not.toBeInTheDocument();
});
// Expand feeds
fireEvent.click(screen.getByText(/feeds/i, { selector: 'h2' }));
await waitFor(() => {
expect(screen.getByText(/no feeds found/i)).toBeInTheDocument();
});
});
});
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