Question

我是单元测试和起订量的新手。我有一个存储库类来检索用户。这是存储库类代码：

public class UserRepository : IUserRepository
    {
        private readonly UserManager<UserEntity> _userManager;
        private readonly IMapper _mapper;

        public UserRepository(
            UserManager<UserEntity> userManager,
            IMapper mapper)
        {
            _userManager = userManager;
            _mapper = mapper;
        }

        public async Task<IEnumerable<User>> GetUsersAsync(
            PagingOptions pagingOptions)
        {
            IQueryable<UserEntity> query = _userManager.Users;
            //    query = searchOptions.Apply(query);
            //    query = sortOptions.Apply(query);

            var size = await query.CountAsync();

            var items = await query
                .Skip(pagingOptions.Offset.Value)
                .Take(pagingOptions.Limit.Value)
                .ProjectTo<User>(_mapper.ConfigurationProvider)
                .ToArrayAsync();

            return items;
        }
}

如下图所示，当我正常运行应用程序时，此方法工作正常。

但是当我使用x单元单元测试项目运行相同的代码时，执行var size = await query.CountAsync();时出现以下错误：

IQueryable源的提供程序未实现 IAsyncQueryProvider。仅实现IAsyncQueryProvider的提供程序可以用于Entity Framework异步操作。

这是我的单元测试代码：

public class UserRepositoryTests
    {
        [Fact]
        public async void GetUsers_AtleastOne_ReturnOneOrMore()
        {
            // Arrange
            var connectionStringBuilder =
                new SqliteConnectionStringBuilder { DataSource = ":memory:" };
            var connection = new SqliteConnection(connectionStringBuilder.ToString());

            var options = new DbContextOptionsBuilder<GallaContext>()
                .UseSqlite(connection)
                .Options;

            var mockHttpContextAccessor = new Mock<IHttpContextAccessor>();
            var mockUserManager = new Mock<UserManager<UserEntity>>(new Mock<IUserStore<UserEntity>>().Object,
                    new Mock<IOptions<IdentityOptions>>().Object,
                    new Mock<IPasswordHasher<UserEntity>>().Object,
                    new IUserValidator<UserEntity>[0],
                    new IPasswordValidator<UserEntity>[0],
                    new Mock<ILookupNormalizer>().Object,
                    new Mock<IdentityErrorDescriber>().Object,
                    new Mock<IServiceProvider>().Object,
                    new Mock<ILogger<UserManager<UserEntity>>>().Object);
            var autoMapper = new MapperConfiguration(mc => mc.AddProfile(new MappingProfile())).CreateMapper();

            var pagingOptions = new PagingOptions
            {
                Limit = 25,
                Offset = 0
            };

            using (var context = new GallaContext(options, mockHttpContextAccessor.Object))
            {
                context.Database.OpenConnection();
                context.Database.EnsureCreated();

                var userRepository = new UserRepository(mockUserManager.Object, autoMapper);

                // Act
                var users = await userRepository.GetUsersAsync(pagingOptions);

                // Assert
                users.Should().HaveCountGreaterOrEqualTo(1);
            }
        }
    }

我错误地嘲笑UserManager吗？我的上下文类还具有要通过OnModelCreating方法添加到数据库中的数据。因此，在单元测试中调用context.Database.EnsureCreated();时上下文具有数据。这是运行单元测试时错误图像的屏幕截图

谢谢

阿卜杜勒

单元测试-最小起订量-源IQueryable的提供者未实现IAsyncQueryProvider

0 个答案: