refactor auth redirect and add ConditionalRedirect unit tests and App unit and functional tests

__tests__/tests/App.test.jsx

@@ -0,0 +1,37 @@
+import React from 'react';
+import { shallow, mount } from 'enzyme';
+import App from '../../src/App';
+import api from '../../src/api';
+import Dashboard from '../../src/pages/Dashboard';
+import Login from '../../src/pages/Login';
+
+describe('<App />', () => {
+  test('renders without crashing', () => {
+    const appWrapper = shallow(<App />);
+    expect(appWrapper.length).toBe(1);
+  });
+
+  test('renders login page when not authenticated', () => {
+    api.isAuthenticated = jest.fn();
+    api.isAuthenticated.mockReturnValue(false);
+
+    const appWrapper = mount(<App />);
+
+    const redirectChild = appWrapper.find(Login);
+    expect(redirectChild.length).toBe(1);
+    const routeChild = appWrapper.find(Dashboard);
+    expect(routeChild.length).toBe(0);
+  });
+
+  test('renders dashboard when authenticated', () => {
+    api.isAuthenticated = jest.fn();
+    api.isAuthenticated.mockReturnValue(true);
+
+    const appWrapper = mount(<App />);
+
+    const redirectChild = appWrapper.find(Dashboard);
+    expect(redirectChild.length).toBe(1);
+    const routeChild = appWrapper.find(Login);
+    expect(routeChild.length).toBe(0);
+  });
+});