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import { describe, it, expect, vi, beforeEach } from 'vitest';
import { readFileSync } from 'fs';
import { resolve } from 'path';
import { store } from './store';
import { renderLayout, renderItems } from './main';
import { apiFetch } from './api';
// Mock api
vi.mock('./api', () => ({
apiFetch: vi.fn()
}));
// Mock IntersectionObserver
class MockIntersectionObserver {
observe = vi.fn();
unobserve = vi.fn();
disconnect = vi.fn();
}
vi.stubGlobal('IntersectionObserver', MockIntersectionObserver);
// Read the main stylesheet once for CSS rule assertions
const cssContent = readFileSync(resolve(__dirname, 'style.css'), 'utf-8');
describe('Mobile horizontal overflow prevention', () => {
beforeEach(() => {
document.body.innerHTML = '<div id="app"></div>';
vi.stubGlobal('location', {
href: 'http://localhost/v3/',
pathname: '/v3/',
search: '',
assign: vi.fn(),
replace: vi.fn()
});
vi.stubGlobal('history', { pushState: vi.fn() });
Element.prototype.scrollIntoView = vi.fn();
vi.clearAllMocks();
store.setFeeds([]);
store.setTags([]);
store.setItems([]);
vi.mocked(apiFetch).mockResolvedValue({
ok: true,
status: 200,
json: async () => []
} as Response);
});
describe('CSS containment rules', () => {
it('.item-description should have overflow-x hidden to contain wide RSS content', () => {
// .item-description must prevent wide child elements (tables, iframes)
// from causing horizontal viewport overflow
const itemDescBlock = cssContent.match(
/\.item-description\s*\{[^}]*\}/g
);
expect(itemDescBlock).not.toBeNull();
const mainBlock = itemDescBlock!.find(
block => !block.includes('img') && !block.includes('video') && !block.includes('pre') && !block.includes(' a')
);
expect(mainBlock).toBeDefined();
expect(mainBlock).toMatch(/overflow-x:\s*hidden/);
});
it('.item-description should constrain tables with max-width', () => {
// RSS feeds commonly contain <table> elements with explicit widths
const tableRule = cssContent.match(
/\.item-description\s+table[^{]*\{[^}]*max-width:\s*100%/
);
expect(tableRule).not.toBeNull();
});
it('.item-description should constrain iframes with max-width', () => {
// RSS feeds commonly embed iframes (YouTube, etc.) with fixed widths
const iframeRule = cssContent.match(
/\.item-description\s+iframe[^{]*\{[^}]*max-width:\s*100%/
);
expect(iframeRule).not.toBeNull();
});
it('.main-content should explicitly set overflow-x hidden', () => {
// .main-content must not allow horizontal scrolling
const mainContentBlock = cssContent.match(
/\.main-content\s*\{[^}]*\}/
);
expect(mainContentBlock).not.toBeNull();
expect(mainContentBlock![0]).toMatch(/overflow-x:\s*hidden/);
});
});
describe('Rendered content containment', () => {
it('should render items with wide table content without breaking layout', () => {
renderLayout();
const wideTableItem = {
_id: 1,
title: 'Wide Table Post',
url: 'http://example.com',
publish_date: '2024-01-01',
read: false,
starred: false,
description: '<table width="2000"><tr><td>Very wide table from RSS</td></tr></table>'
} as any;
store.setItems([wideTableItem]);
renderItems();
const desc = document.querySelector('.item-description');
expect(desc).not.toBeNull();
expect(desc!.innerHTML).toContain('<table');
// The item-description element should be inside main-content
// which constrains overflow
const mainContent = document.getElementById('main-content');
expect(mainContent).not.toBeNull();
expect(mainContent!.contains(desc!)).toBe(true);
});
it('should render items with wide iframe content without breaking layout', () => {
renderLayout();
const wideIframeItem = {
_id: 2,
title: 'Embedded Video Post',
url: 'http://example.com',
publish_date: '2024-01-01',
read: false,
starred: false,
description: '<iframe width="1200" height="600" src="https://example.com/embed"></iframe>'
} as any;
store.setItems([wideIframeItem]);
renderItems();
const desc = document.querySelector('.item-description');
expect(desc).not.toBeNull();
expect(desc!.innerHTML).toContain('<iframe');
});
it('should render items with wide image using inline style without breaking layout', () => {
renderLayout();
const wideImgItem = {
_id: 3,
title: 'Wide Image Post',
url: 'http://example.com',
publish_date: '2024-01-01',
read: false,
starred: false,
description: '<img style="width: 1500px" src="https://example.com/wide.jpg">'
} as any;
store.setItems([wideImgItem]);
renderItems();
const desc = document.querySelector('.item-description');
expect(desc).not.toBeNull();
expect(desc!.innerHTML).toContain('<img');
});
});
});
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