♻️ refactor(App): use react router

this adds `MainPage`

src/App.test.tsx

@@ -1,62 +0,0 @@
-// Imports
-import { describe, it, expect, afterEach } from 'vitest';
-import { render, screen, cleanup } from '@testing-library/react';
-import userEvent  from '@testing-library/user-event';
-
-// To Test
-import App from './App';
-
-// Tests
-describe('Renders main page correctly', async () => {
-    /**
-     * Resets all renders after each test
-     */
-    afterEach(() => {
-        cleanup();
-    });
-
-    /**
-     * Passes - shows title correctly
-     */
-    it('Should render the page correctly', async () => {
-        // Setup
-        await render(<App />);
-        const h1 = await screen.queryByText('Vite + React');
-
-        // Post Expectations
-        expect(h1).toBeInTheDocument();
-    });
-
-    /**
-     * Passes - shows the button count correctly present
-     */
-    it('Should show the button count set to 0', async () => {
-        // Setup
-        await render(<App />);
-        const button = await screen.queryByText('count is 0');
-
-        // Expectations
-        expect(button).toBeInTheDocument();
-    });
-
-    /**
-     * Passes - clicks the button 3 times and shows the correct count
-     */
-    it('Should show the button count set to 3', async () => {
-        // Setup
-        const user = userEvent.setup();
-        await render(<App />);
-        const button = await screen.queryByText('count is 0');
-
-        // Pre Expectations
-        expect(button).toBeInTheDocument();
-
-        // Actions
-        await user.click(button as HTMLElement);
-        await user.click(button as HTMLElement);
-        await user.click(button as HTMLElement);
-
-        // Post Expectations
-        expect(button?.innerHTML).toBe('count is 3');
-    });
-});

src/App.tsx

@@ -1,35 +1,14 @@
-import { useState } from 'react'
-import reactLogo from './assets/react.svg'
-import viteLogo from '/vite.svg'
-import './App.css'
+import { createBrowserRouter, RouterProvider } from 'react-router-dom'
 
-function App() {
-  const [count, setCount] = useState(0)
+import { MainPage } from 'components/pages'
 
-  return (
-    <>
-      <div>
-        <a href="https://vitejs.dev" target="_blank">
-          <img src={viteLogo} className="logo" alt="Vite logo" />
-        </a>
-        <a href="https://react.dev" target="_blank">
-          <img src={reactLogo} className="logo react" alt="React logo" />
-        </a>
-      </div>
-      <h1>Vite + React</h1>
-      <div className="card">
-        <button onClick={() => setCount((count) => count + 1)}>
-          count is {count}
-        </button>
-        <p>
-          Edit <code>src/App.tsx</code> and save to test HMR
-        </p>
-      </div>
-      <p className="read-the-docs">
-        Click on the Vite and React logos to learn more
-      </p>
-    </>
-  )
-}
+const router = createBrowserRouter([
+  {
+    path: '/',
+    element: <MainPage />,
+  },
+])
+
+const App = () => <RouterProvider router={router} />
 
 export default App

src/components/pages/MainPage/MainPage.test.tsx

@@ -0,0 +1,60 @@
+import { describe, it, expect, afterEach } from 'vitest'
+import { render, screen, cleanup } from '@testing-library/react'
+import userEvent from '@testing-library/user-event'
+
+import MainPage from './MainPage'
+
+// Tests
+describe('Renders main page correctly', async () => {
+  /**
+   * Resets all renders after each test
+   */
+  afterEach(() => {
+    cleanup()
+  })
+
+  /**
+   * Passes - shows title correctly
+   */
+  it('Should render the page correctly', async () => {
+    // Setup
+    await render(<MainPage />)
+    const h1 = await screen.queryByText('Vite + React')
+
+    // Post Expectations
+    expect(h1).toBeInTheDocument()
+  })
+
+  /**
+   * Passes - shows the button count correctly present
+   */
+  it('Should show the button count set to 0', async () => {
+    // Setup
+    await render(<MainPage />)
+    const button = await screen.queryByText('count is 0')
+
+    // Expectations
+    expect(button).toBeInTheDocument()
+  })
+
+  /**
+   * Passes - clicks the button 3 times and shows the correct count
+   */
+  it('Should show the button count set to 3', async () => {
+    // Setup
+    const user = userEvent.setup()
+    await render(<MainPage />)
+    const button = await screen.queryByText('count is 0')
+
+    // Pre Expectations
+    expect(button).toBeInTheDocument()
+
+    // Actions
+    await user.click(button as HTMLElement)
+    await user.click(button as HTMLElement)
+    await user.click(button as HTMLElement)
+
+    // Post Expectations
+    expect(button?.innerHTML).toBe('count is 3')
+  })
+})

src/components/pages/MainPage/MainPage.tsx

@@ -0,0 +1,31 @@
+import { useState } from 'react'
+import reactLogo from 'assets/react.svg'
+import viteLogo from '/vite.svg'
+import './MainPage.css'
+
+function MainPage() {
+  const [count, setCount] = useState(0)
+
+  return (
+    <>
+      <div>
+        <a href="https://vitejs.dev" target="_blank">
+          <img src={viteLogo} className="logo" alt="Vite logo" />
+        </a>
+        <a href="https://react.dev" target="_blank">
+          <img src={reactLogo} className="logo react" alt="React logo" />
+        </a>
+      </div>
+      <h1>Vite + React</h1>
+      <div className="card">
+        <button onClick={() => setCount(count => count + 1)}>count is {count}</button>
+        <p>
+          Edit <code>src/App.tsx</code> and save to test HMR
+        </p>
+      </div>
+      <p className="read-the-docs">Click on the Vite and React logos to learn more</p>
+    </>
+  )
+}
+
+export default MainPage

src/components/pages/MainPage/index.ts

@@ -0,0 +1 @@
+export { default } from './MainPage'

src/components/pages/index.ts

@@ -0,0 +1 @@
+export { default as MainPage } from './MainPage'