fix: browser tab showing url instead of page title (#2382)

apps/client/src/components/ui/document-title.test.tsx

@@ -0,0 +1,45 @@
+import { describe, expect, it, beforeEach } from "vitest";
+import { render } from "@testing-library/react";
+import { HelmetProvider } from "react-helmet-async";
+import { DocumentTitle } from "./document-title.tsx";
+
+const renderTitle = (ui: React.ReactNode) =>
+  render(<HelmetProvider>{ui}</HelmetProvider>);
+
+describe("DocumentTitle", () => {
+  beforeEach(() => {
+    document.head.innerHTML = "<title>Docmost</title>";
+  });
+
+  it("appends the app name", () => {
+    renderTitle(<DocumentTitle title="Home" />);
+    expect(document.title).toBe("Home - Docmost");
+  });
+
+  it("omits the app name when asked", () => {
+    renderTitle(<DocumentTitle title="My page" withAppName={false} />);
+    expect(document.title).toBe("My page");
+  });
+
+  it("falls back to the app name without a title", () => {
+    renderTitle(<DocumentTitle />);
+    expect(document.title).toBe("Docmost");
+  });
+
+  it("never renders an empty title", () => {
+    renderTitle(<DocumentTitle title="Spaces" />);
+    const titles = Array.from(document.querySelectorAll("head > title"));
+    expect(titles.every((node) => node.textContent !== "")).toBe(true);
+  });
+
+  it("renders extra head children", () => {
+    renderTitle(
+      <DocumentTitle title="Shared">
+        <meta name="robots" content="noindex" />
+      </DocumentTitle>,
+    );
+    expect(
+      document.querySelector('head > meta[name="robots"]')?.getAttribute("content"),
+    ).toBe("noindex");
+  });
+});