Chore: homepage tests (#6278)

src/__tests__/pages/_document.test.jsx

@@ -0,0 +1,24 @@
+import { renderToStaticMarkup } from "react-dom/server";
+import { describe, expect, it, vi } from "vitest";
+
+vi.mock("next/document", () => ({
+  Html: ({ children }) => <div data-testid="html">{children}</div>,
+  Head: ({ children }) => <div data-testid="head">{children}</div>,
+  Main: () => <main data-testid="main" />,
+  NextScript: () => <script data-testid="nextscript" />,
+}));
+
+import Document from "pages/_document.jsx";
+
+describe("pages/_document", () => {
+  it("renders the PWA meta + custom css links", () => {
+    const html = renderToStaticMarkup(<Document />);
+
+    expect(html).toContain('meta name="mobile-web-app-capable" content="yes"');
+    expect(html).toContain('link rel="manifest" href="/site.webmanifest?v=4"');
+    expect(html).toContain('link rel="preload" href="/api/config/custom.css" as="style"');
+    expect(html).toContain('link rel="stylesheet" href="/api/config/custom.css"');
+    expect(html).toContain('data-testid="main"');
+    expect(html).toContain('data-testid="nextscript"');
+  });
+});