我有一些测试代码声明重复用户无法通过我的UserRepository创建.
User.cs:
public class User { public int Id { get; set; } public string AccountAlias { get; set; } public string displayName { get; set; } public string Email { get; set; } public bool IsActive { get; set; } }
UserRepository.cs:
public class UserRepository { public virtual async Task<User> CreateAsync(User entity) { if (entity == null) { throw new ArgumentNullException("entity"); } if (await GetDuplicateAsync(entity) != null) { throw new InvalidOperationException("This user already exists"); } return Create(entity); } public async Task<User> GetDuplicateAsync(User user) { if (user == null) { throw new ArgumentNullException("user"); } return await (from u in Users where u.AccountAlias == user.AccountAlias && u.Id != user.Id && u.IsActive select u).FirstOrDefaultAsync(); } }
UserRepositoryTests.cs:
public sealed class UserRepositoryTests : Idisposable { public UserRepositoryTests() { UserRepository = new UserRepository(new FooEntities()); // DbContext // from EF } private UserRepository UserRepository { get; set; } [Fact] public void DuplicateUserCannotBeCreated() { var testUser = new User // This test user already exists in database { Id = 0,AccountAlias = "domain\\foo",displayName = "Foo",Email = "foo@bar.com",IsActive = true }; Assert.Throws<InvalidOperationException>(async () => await UserRepository.CreateAsync(testUser)); } public void dispose() { if (UserRepository != null) { UserRepository.dispose(); } } }
当我运行这个单元测试时,抛出Xunit.Sdk.ThrowsException(即没有抛出我的InvalidOperationException):
Assert.Throws() Failure
Expected: system.invalidOperationException
Actual: (No exception was thrown)
从调试器中,对GetDuplicateAsync()进行了评估,但是当执行LINQ查询时,结果从未返回,因此没有抛出异常.有人可以帮忙吗?
解决方法
xUnit的Assert.Throws(至少在版本1.9.2上)不是异步感知的.这已在版本2中修复,现在有一个
Assert.ThrowsAsync
方法.
因此,您可以升级到xUnit 2或创建自己的方法以使其正常工作:
public async static Task<T> ThrowsAsync<T>(Func<Task> testCode) where T : Exception { try { await testCode(); Assert.Throws<T>(() => { }); // Use xUnit's default behavior. } catch (T exception) { return exception; } return null; } await ThrowsAsync<InvalidOperationException>(async () => await UserRepository.CreateAsync(testUser));
从Haacked’s gist开始.
原文地址:https://www.jb51.cc/csharp/97709.html
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