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portfolio/app/__tests__/components/ThemeToggle.test.tsx
denshooter dacec18956
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perf: eliminate next-themes and framer-motion from initial JS bundle
- Replace next-themes (38 KiB) with a tiny custom ThemeProvider (~< 1 KiB)
  using localStorage + classList.toggle for theme management
- Add FOUC-prevention inline script in layout.tsx to apply saved theme
  before React hydrates
- Remove framer-motion from Header.tsx: nav entry now uses CSS slideDown
  keyframe, mobile menu uses CSS opacity/translate transitions
- Remove framer-motion from ThemeToggle.tsx: use Tailwind hover/active scale
- Remove framer-motion from legal-notice and privacy-policy pages
- Update useTheme import in ThemeToggle to use custom ThemeProvider
- Add slideDown keyframe to tailwind.config.ts
- Update tests to mock custom ThemeProvider instead of next-themes

Result: framer-motion moves from "First Load JS shared by all" to lazy
chunks; next-themes chunk eliminated entirely; -38 KiB from initial bundle

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-03-06 17:39:29 +01:00

20 lines
595 B
TypeScript

import { render, screen } from "@testing-library/react";
import { ThemeToggle } from "@/app/components/ThemeToggle";
// Mock custom ThemeProvider
jest.mock("@/app/components/ThemeProvider", () => ({
useTheme: () => ({
theme: "light",
setTheme: jest.fn(),
}),
ThemeProvider: ({ children }: { children: React.ReactNode }) => <>{children}</>,
}));
describe("ThemeToggle Component", () => {
it("renders the theme toggle button", () => {
render(<ThemeToggle />);
// Initial render should have the button
expect(screen.getByRole("button")).toBeInTheDocument();
});
});