add code coverage report

src/App.test.js

@@ -0,0 +1,28 @@
+import React from 'react';
+import { render } from '@testing-library/react';
+import App from './App';
+import ReactDom from "react-dom";
+
+describe('<App/>', function () {
+  it('renders without crashing ', function () {
+    const div = document.createElement("div");
+    ReactDom.render(<App/>,div);
+    ReactDom.unmountComponentAtNode(div);
+  });
+
+  it('renders title', () => {
+    const { getByText } = render(<App />);
+    const linkElement = getByText(/Home Page/i);
+    expect(linkElement).toBeInTheDocument();
+  });
+
+  it('are navlinks correct', function () {
+    const { getByText } = render(<App />);
+    const randomElement = getByText(/Random Video/i);
+    const categoryElement = getByText(/Categories/i);
+    const settingsElement = getByText(/Settings/i);
+    expect(randomElement).toBeInTheDocument();
+    expect(categoryElement).toBeInTheDocument();
+    expect(settingsElement).toBeInTheDocument();
+  });
+});