test: adding getAppRoutes test

shell/router/getAppRoutes.test.tsx

@@ -0,0 +1,59 @@
+import { RouteObject } from 'react-router';
+import { getConfig } from '../../runtime';
+import getAppRoutes from './getAppRoutes';
+
+jest.mock('../../runtime', () => ({
+  getConfig: jest.fn(),
+}));
+
+describe('getAppRoutes', () => {
+  it('should return an empty array when no apps are configured', () => {
+    (getConfig as jest.Mock).mockReturnValue({ apps: [] });
+
+    const routes = getAppRoutes();
+
+    expect(routes).toEqual([]);
+  });
+
+  it('should flatten and return routes from configured apps', () => {
+    const mockApps = [
+      {
+        routes: [
+          { path: '/page1', element: <div>Page 1</div> },
+          { path: '/page2', element: <div>Page 2</div> }
+        ]
+      },
+      {
+        routes: [
+          { path: '/page3', element: <div>Page 3</div> }
+        ]
+      },
+    ];
+
+    (getConfig as jest.Mock).mockReturnValue({ apps: mockApps });
+
+    const routes = getAppRoutes();
+
+    expect(routes).toEqual([
+      { path: '/page1', element: <div>Page 1</div> },
+      { path: '/page2', element: <div>Page 2</div> },
+      { path: '/page3', element: <div>Page 3</div> }
+    ]);
+  });
+
+  it('should ignore apps without routes', () => {
+    const mockRoutes: RouteObject[] = [
+      { path: '/page1', element: <div>Page 1</div> },
+    ];
+    const mockApps = [
+      { routes: mockRoutes },
+      { slots: [] },
+    ];
+
+    (getConfig as jest.Mock).mockReturnValue({ apps: mockApps });
+
+    const routes = getAppRoutes();
+
+    expect(routes).toEqual(mockRoutes);
+  });
+});