re-added tests for when we ever decide to use them

.github/workflows/main.yml

@@ -29,6 +29,8 @@ jobs:
         run: npm install
       - name: Build
         run: npm run build
+      - name: Test
+        run: npm test -- --watch=false
   deploy:
     runs-on: self-hosted
     needs: build

src/App.test.tsx

@@ -0,0 +1,9 @@
+import React from 'react';
+import { render, screen } from '@testing-library/react';
+import App from './App';
+
+test('Home screen contains \'MauMau\'', () => {
+  render(<App />);
+  const linkElement = screen.getByText(/MauMau/i);
+  expect(linkElement).toBeInTheDocument();
+});

src/setupTests.ts

@@ -0,0 +1,5 @@
+// jest-dom adds custom jest matchers for asserting on DOM nodes.
+// allows you to do things like:
+// expect(element).toHaveTextContent(/react/i)
+// learn more: https://github.com/testing-library/jest-dom
+import '@testing-library/jest-dom';