Question

我需要一些帮助模拟和测试我的课程。我尝试了各种方法，觉得这是我最接近的方法。 // 1和// 2是两次单独的尝试。方法一没有错误，但我不知道如何使用Assert调用实际测试任何内容。尝试2有错误消息

无法实例化类的代理：RentalsRated.Data.RentalsDBContext。

测试

[Fact]
public void RepoUA_GetAll()
{
    var users = new List<UserAccount> {
        new UserAccount { Id = "idstring1", Username = "username1"},
        new UserAccount { Id = "idstring2", Username = "username2" },
        new UserAccount { Id = "idstring3", Username = "username3" },
    }.AsQueryable();

    var mockContext = new Mock<RentalsDBContext>();
    var mockSet = new Mock<DbSet<UserAccount>>();

    mockSet.As<IQueryable<UserAccount>>().Setup(m => m.Provider).Returns(users.Provider);
    mockSet.As<IQueryable<UserAccount>>().Setup(m => m.Expression).Returns(users.Expression);
    mockSet.As<IQueryable<UserAccount>>().Setup(m => m.ElementType).Returns(users.ElementType);
    mockSet.As<IQueryable<UserAccount>>().Setup(m => m.GetEnumerator()).Returns(users.GetEnumerator());

    mockContext.Setup(m => m.Set<UserAccount>()).Returns(mockSet.Object).Verifiable();

    //1
    Mock<IRentalsRepository<UserAccount>> MockRepo = new Mock<IRentalsRepository<UserAccount>>();
    MockRepo.Setup(m => m.GetAll()).Returns(users);

    //2
    var testClass = new RentalsRepository<UserAccount>(mockContext.Object);
    var result = testClass.Get("idstring2");

    Assert.Equal("idstring2", result.Id);
}

回购

public class RentalsRepository<T> : IRentalsRepository<T> where T : BaseClass
{
    private readonly RentalsDBContext _Context;
    private DbSet<T> entities;
    string errorMessage = string.Empty;

    public RentalsRepository(RentalsDBContext _Context)
    {
        this._Context = _Context;
        entities = _Context.Set<T>();
    }

    public IEnumerable<T> GetAll()
    {
        return entities.AsEnumerable();
    }
}

上下文

public class RentalsDBContext : DbContext
{

    public RentalsDBContext(DbContextOptions<RentalsDBContext> options) : base(options)
    {
    }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {

    }

    public virtual DbSet<UserAccount> UserAccounts { get; set; }
    public virtual DbSet<Rating> Ratings { get; set; }
    public virtual DbSet<PropertyAddress> PropertyAddresses { get; set; }
    public virtual DbSet<Town> Towns { get; set; }
    public virtual DbSet<County> Countys { get; set; }
    public virtual DbSet<RatingImage> RatingImages { get; set; }
}

Answer 1

您将成为RentalsDBContext的默认构造函数，因为Moq无法使用其当前构造函数实例化该类。

public class RentalsDBContext : DbContext {

    public RentalsDBContext() : base() { }

    public RentalsDBContext(DbContextOptions<RentalsDBContext> options) : base(options)
    {
    }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {

    }

    //...other code removed for brevity
}

模拟和单元测试ASP.Net 1.0存储库

1 个答案: