单元测试.NET核心3 Web API控制器

Question

我在中有一个控制器。NET Core v3 web API项目

public class MyController : ControllerBase
{
private readonly IService service;
public MyController (IService service)
{
this.service= service;
}
HttpGet("{id}")]
public async Task<ActionResult<MyModel>> Get(int id)
{
var record= await service.GetAsync(id);
if (record== null)
return NotFound();
return Ok(Convert to model before returning);
}
}

我正在尝试使用NUnit为Get方法编写一个单元测试。

这就是我所拥有的，它是有效的：

[Test]
public void Get_WhenCalled_ReturnNotFound()
{
service = new Mock<IService>();
controller = new MyController(service.Object);
service.Setup(service => service.GetAsync(1)).ReturnsAsync((MyType)null);
var result = controller.Get(1);
Assert.That(result.Result.Result, Is.TypeOf<NotFoundResult>());
}

但在断言中，我必须调用result.Result.Result。这看起来有点奇怪。我能绕过这个吗？

我也试过下面的行，但它是一样的：

service.Setup(service => service.GetAsync(1)).Returns(Task.FromResult((MyType)null));

Answer 1

您可以通过使用async/await编写测试来减少1个结果。

[Test]
public async Task Get_WhenCalled_ReturnNotFound()
{
service = new Mock<IService>();
controller = new MyController(service.Object);
service.Setup(service => service.GetAsync(1)).ReturnsAsync((MyType)null);
var result = await controller.Get(1);
Assert.That(result.Result, Is.TypeOf<NotFoundResult>());
}