我正在尝试使用mstest为.net Core 3 Web API建立单元测试。
我也在使用:
当未找到啤酒时,此单元测试应返回NotFound()
响应。
private IFixture _fixture;
private BeerController _beerController;
private Mock<IBeerService> _mockBeerService;
[TestInitialize]
public void Initialize()
{
_fixture = new Fixture().Customize(new AutoMoqCustomization());
_mockBeerService = _fixture.Freeze<Mock<IBeerService>>();
_beerController = _fixture.Create<BeerController>();
}
[TestMethod]
public async Task WhenCallGetBeerWithoutMatchReturnNotFound404()
{
//Arrange
int beerId = _fixture.Create<int>();
_mockBeerService.Setup(x => x.GetBeer(It.IsAny<int>())).Returns((Task<Beer>)null);
//Act
var actionResult = await _beerController.Get(beerId);
//Assert
Assert.IsInstanceOfType(actionResult.Result, typeof(NotFoundResult));
}
这是我要测试的功能:
[HttpGet("{beerId:int}")]
public async Task<ActionResult<beer>> Get(int beerId)
{
try
{
var beer = await _beerService.Getbeer(beerId);
if (beer == null) return NotFound();
return Ok(beer);
}
catch (Exception)
{
return BadRequest();
}
}
但是我在此代码行Object reference not set to an instance of an object.
上遇到了var beer = await _biereService.Getbeer(beerId);
异常:>
这是堆栈跟踪:at BeerProject.Controllers.BeerController.<Get>d__2.MoveNext() in F:\DevProjects\Repos\API_BeerProject\BeerProject\Controllers\BeerController.cs:line 29
我通过此测试测试了return Ok(beer)
:
[TestMethod] public async Task WhenCallGetBeerWithMatchReturnOk200() { //Arrange int beerId = _fixture.Create<int>(); var beer = _fixture.Create<Task<Beer>>(); _mockBeerService.Setup(x => x.GetBeer(It.IsAny<int>())).Returns(beer); //Act var actionResult = await _beerController.Get(beerId); //Assert Assert.IsInstanceOfType(actionResult.Result, typeof(OkObjectResult)); }
并且运行正常。
所以我猜他不喜欢.Returns((Task<Beer>)null)
中的WhenCallGetBeerWithoutMatchReturnNotFound404()
我正在尝试使用mstest为.net Core 3 Web API构建单元测试。我还在使用:Autofixture Moq AutoFixture.AutoMoq当未找到啤酒时,此单元测试应返回NotFound()响应。 ...
在您的控制器中,您假设GetBeer
返回一个非空任务,因为您无条件地等待它。然后,您检查结果(啤酒)以查看是否为null
: