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feat: add UI tests for CookieBanner and configure vitest for React #132

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Merged
ViktorSvertoka merged 1 commit into from
Jan 13, 2026
Merged

feat: add UI tests for CookieBanner and configure vitest for React #132

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53 changes: 53 additions & 0 deletions frontend/components/tests/CookieBanner.test.tsx
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Original file line number Diff line number Diff line change
@@ -0,0 +1,53 @@
import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
import { render, screen, act, fireEvent } from '@testing-library/react';
import { CookieBanner } from '@/components/shared/CookieBanner';

vi.mock('next-intl', () => ({
useTranslations: () => (key: string) => key,
}));

vi.mock('@/i18n/routing', () => ({
Link: ({ children }: { children: React.ReactNode }) => (
<a href="#">{children}</a>
),
}));
Comment on lines +9 to +13
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@coderabbitai coderabbitai Bot Jan 13, 2026

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⚠️ Potential issue | 🟡 Minor

Add React import for JSX in the mock.

The Link mock returns JSX but doesn't import React. While React 17+ automatic JSX transform handles this in regular files, hoisted vi.mock calls may not have access to the transform context.

🐛 Proposed fix 
+import React from 'react';
 import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
 import { render, screen, act, fireEvent } from '@testing-library/react';
 import { CookieBanner } from '@/components/shared/CookieBanner';
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
vi.mock('@/i18n/routing', () => ({
Link: ({ children }: { children: React.ReactNode }) => (
<a href="#">{children}</a>
),
}));
import React from 'react';
import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
import { render, screen, act, fireEvent } from '@testing-library/react';
import { CookieBanner } from '@/components/shared/CookieBanner';
vi.mock('@/i18n/routing', () => ({
Link: ({ children }: { children: React.ReactNode }) => (
<a href="#">{children}</a>
),
}));
🤖 Prompt for AI Agents 
In @frontend/components/tests/CookieBanner.test.tsx around lines 9 - 13, The
hoisted vi.mock callback returns JSX but lacks the React binding, causing
failures under the mock's transform context; fix by importing React into the
test module scope (e.g., add import React from 'react' at the top of the test)
so the Link mock (the vi.mock(...) implementation that returns <a
href="#">{children}</a>) has React available for JSX, or alternatively rewrite
the mock to use React.createElement for the Link implementation.


vi.mock('lucide-react', () => ({
X: () => <span data-testid="close-icon">X</span>,
}));

describe('CookieBanner UI', () => {
beforeEach(() => {
localStorage.clear();
vi.useFakeTimers();
});

afterEach(() => {
vi.useRealTimers();
});

it('Wait 500ms -> Banner Appears', () => {
render(<CookieBanner />);
expect(screen.queryByText('title')).toBeNull();

act(() => {
vi.advanceTimersByTime(500);
});

expect(screen.getByText('title')).toBeDefined();
});

it('Click Accept -> Saves to LocalStorage -> Hides Banner', () => {
render(<CookieBanner />);

act(() => {
vi.advanceTimersByTime(500);
});

const acceptButton = screen.getByText('accept');
fireEvent.click(acceptButton);

expect(localStorage.getItem('cookie-consent')).toBe('accepted');
expect(screen.queryByText('title')).toBeNull();
});
});
3 changes: 3 additions & 0 deletions frontend/drizzle/0014_steep_kabuki.sql
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ALTER TABLE "quiz_attempts" ADD CONSTRAINT "quiz_attempts_user_id_users_id_fk" FOREIGN KEY ("user_id") REFERENCES "public"."users"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
CREATE INDEX "quiz_attempts_user_id_idx" ON "quiz_attempts" USING btree ("user_id");--> statement-breakpoint
CREATE INDEX "quiz_attempts_quiz_id_idx" ON "quiz_attempts" USING btree ("quiz_id");
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