如何伪造EntityFramework.Extended FutureQuery?

时间:2016-05-10 21:15:39

标签: c# entity-framework testing entity-framework-6 entity-framework-extended

我正在寻找一个虚假的存储库。

public class FooRepo {

    public FutureFoo<Foo> GetById(int id) {

        var foo = new Foo();
        return new FutureValue(foo);
    }

    public FutureQuery<Foo> GetByCategory(int categoryId) {

        var foos = new[] { new Foo(), new Foo() new Foo() };

        return  //what goes here?
    }

}

这样做的目的是编写依赖于数据的测试,而不依赖于任何数据库连接。这对FutureValue<>类型来说非常简单,因为它提供了一个接受直接对象的构造函数。但是FutureQuery<>的构造函数接受参数IQueryable query, Action loadAction

我可以忽略loadAction吗?

例如:new FutureQuery<Foo>(foos.AsQueryable(), () => { });

或者正确的方法是什么?

强制解决方案:

(FutureQuery<Foo>) Activator.CreateInstance(typeof(FutureQuery<Foo>),
                   BindingFlags.NonPublic | BindingFlags.Instance, null, 
                   new object[] { foos.AsQueryable(), null }, null);

1 个答案:

答案 0 :(得分:1)

取自FutureQueryBase.GetResult()

    /// <summary>
    /// Gets the result by invoking the <see cref="LoadAction"/> if not already loaded.
    /// </summary>
    /// <returns>
    /// An <see cref="T:System.Collections.Generic.IEnumerable`1"/> that can be used to iterate through the collection.
    /// </returns>
    protected virtual IEnumerable<T> GetResult()
    {
        if (IsLoaded)
            return _result;

        // no load action, run query directly
        if (LoadAction == null)
        {
            _isLoaded = true;
            _result = _query as IEnumerable<T>;
            return _result;
        }

        // invoke the load action on the datacontext
        // result will be set with a callback to SetResult
        LoadAction.Invoke();
        return _result ?? Enumerable.Empty<T>();
    }

除非您想通过SetResult(ObjectContext, DbDataReader)明确更新null,否则您应该为加载操作传递_result