xUnit - Unit Testing with Moq

1public class OrderServiceTests
2{
3    private readonly Mock<IOrderRepository> _mockRepository;
4    private readonly Mock<ILogger<OrderService>> _mockLogger;
5    private readonly OrderService _service;
6 
7    public OrderServiceTests()
8    {
9        _mockRepository = new Mock<IOrderRepository>();
10        _mockLogger = new Mock<ILogger<OrderService>>();
11        _service = new OrderService(_mockRepository.Object, _mockLogger.Object);
12    }
13 
14    [Fact]
15    public async Task GetOrderAsync_ReturnsOrder_WhenExists()
16    {
17        var order = new Order { Id = 1, Total = 100m };
18        _mockRepository.Setup(r => r.GetByIdAsync(1)).ReturnsAsync(order);
19 
20        var result = await _service.GetOrderAsync(1);
21 
22        Assert.NotNull(result);
23        Assert.Equal(100m, result.Total);
24    }
25 
26    [Theory]
27    [InlineData(0)]
28    [InlineData(-1)]
29    public async Task GetOrderAsync_ThrowsException_WhenInvalidId(int id)
30    {
31        await Assert.ThrowsAsync<ArgumentException>(() => _service.GetOrderAsync(id));
32    }
33}