[编辑(2020年5月)] —— 据报道这个问题已在新版本的NUnit中得以解决。请参阅Nunit.ThrowsAsync。(参见此答案,感谢 @ James-Ross)
我有一个控制器UserController
和以下操作:
// GET /blah
public Task<User> Get(string domainUserName)
{
if (string.IsNullOrEmpty(domainUserName))
{
throw new ArgumentException("No username specified.");
}
return Task.Factory.StartNew(
() =>
{
var user = userRepository.GetByUserName(domainUserName);
if (user != null)
{
return user;
}
throw new HttpResponseException(Request.CreateErrorResponse(HttpStatusCode.NotFound, string.Format("{0} - username does not exist", domainUserName)));
});
}
我正在尝试编写一个测试用例,来处理抛出404异常的情况。
这是我的尝试及输出结果:
1)
[Test]
public void someTest()
{
var mockUserRepository = new Mock<IUserRepository>();
mockUserRepository.Setup(x => x.GetByUserName(It.IsAny<string>())).Returns(default(User));
var userController = new UserController(mockUserRepository.Object) { Request = new HttpRequestMessage() };
Assert.That(async () => await userController.Get("foo"), Throws.InstanceOf<HttpResponseException>());
}
结果 测试失败
Expected: instance of <System.Web.Http.HttpResponseException>
But was: no exception thrown
[Test] public void someTest() { var mockUserRepository = new Mock(); mockUserRepository.Setup(x => x.GetByUserName(It.IsAny())).Returns(default(User)); var userController = new UserController(mockUserRepository.Object) { Request = new HttpRequestMessage() };
var httpResponseException = Assert.Throws<HttpResponseException>(() => userController.Get("foo").Wait()); Assert.That(httpResponseException.Response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
}
结果 测试失败
Expected: <System.Web.Http.HttpResponseException>
But was: <System.AggregateException> (One or more errors occurred.)
[Test]
public void someTest()
{
var mockUserRepository = new Mock<IUserRepository>();
mockUserRepository.Setup(x => x.GetByUserName(It.IsAny<string>())).Returns(default(User));
var userController = new UserController(mockUserRepository.Object) { Request = new HttpRequestMessage() };
var httpResponseException = Assert.Throws<HttpResponseException>(async () => await userController.Get("foo"));
Assert.That(httpResponseException.Response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
}
结果 测试失败
Expected: <System.Web.Http.HttpResponseException>
But was: null
[Test]
[ExpectedException(typeof(HttpResponseException))]
public async void ShouldThrow404WhenNotFound()
{ var mockUserRepository = new Mock<IUserRepository>();
mockUserRepository.Setup(x => x.GetByUserName(It.IsAny<string>())).Returns(default(User));
var userController = new UserController(mockUserRepository.Object) { Request = new HttpRequestMessage() };
var task = await userController.Get("foo");
}
结果 测试通过
问题 -
- 为什么Assert.Throws无法处理HttpResponseException,而ExpectedException可以处理?
- 我不仅想测试异常是否抛出,还想断言响应的状态码。怎么做?
欢迎对这些行为及其原因进行比较!