suggestion PalisadoesFoundation#2

src/vitest.test.tsx

@@ -5,17 +5,32 @@ import '@testing-library/jest-dom';
 
 describe('Vitest Configuration', () => {
   it('should support TypeScript', () => {
-    const value = 42;
-    expect(typeof value).toBe('number');
+    interface TestInterface {
+      id: number;
+      name: string;
+    }
+    const value: TestInterface = { id: 42, name: 'test' };
+    expect(value.id).toBe(42);
+    expect(value.name).toBe('test');
   });
 
-  it('should support DOM testing', async () => {
+  it('should support DOM testing', () => {
     render(<div data-testid="test">Hello</div>);
     expect(screen.getByTestId('test')).toBeInTheDocument();
   });
 
-  it('should support mocking', async () => {
+  it('should support mocking', () => {
     const mock = vi.fn().mockReturnValue('mocked');
     expect(mock()).toBe('mocked');
+
+    // Test spy functionality
+    const spy = vi.spyOn(console, 'log');
+    console.log('test');
+
+    expect(spy).toHaveBeenCalledWith('test');
+
+    // Test mock implementation
+    const mockWithImpl = vi.fn().mockImplementation((x: number) => x * 2);
+    expect(mockWithImpl(2)).toBe(4);
   });
 });