controller-3.cs

public class HomeController : Controller
{
    public ActionResult Index()
    {
        return View();
    }
}

public class HomeControllerTests
{
    [Fact]
    public void Index_ReturnsNonNullView()
    {
        // Arrange
        var controller = new HomeController();
        
        // Act
        var result = (ViewResult)controller.Index();
        
        // Assert
        Assert.NotNull(result);
    }
}