add tests and add scheduled session cleanup workflow

.github/workflows/cleanup.yml

@@ -0,0 +1,14 @@
+name: 🗑 Cleanup session files
+
+on:
+  schedule:
+    # * is a special character in YAML so you have to quote this string
+    - cron:  '0 * * * *'
+
+jobs:
+  cleanup:
+    name: 🗑 Cleanup
+    runs-on: ubuntu-latest
+    steps:
+      - name: Cleanup
+        run: curl https://seroviz.seroanalytics.org/api/

test/components/FAQ.test.tsx

@@ -0,0 +1,12 @@
+import React from "react";
+import {render, screen} from "@testing-library/react";
+import FAQ from "../../src/components/FAQ";
+
+describe("<FAQ />", () => {
+    test("renders FAQ", async () => {
+
+        render(<FAQ/>);
+        const list = await screen.findAllByRole("listitem");
+        expect(list.length).toBe(5);
+    });
+});

test/components/TopNav.test.tsx

@@ -8,6 +8,12 @@ import {
 } from "../../src/RootContext";
 import TopNav from "../../src/components/TopNav";
 
+test("Displays FAQ link", async () => {
+    render(<TopNav theme={"light"} setTheme={jest.fn()}/>);
+    const faq = screen.getByText("FAQ") as HTMLAnchorElement;
+    expect(faq.href).toBe("http://localhost/faq");
+});
+
 test("user can end session", async () => {
     mockAxios.onDelete(`/session/`)
         .reply(200, mockSuccess("OK"));