How do I create an abstract class from DbQuery and IDbSet on EntityFramework

Question

is that possible create an abstract class from DbQuery and IDbSet? I'm trying to create an abstraction layer for my unit testing.

public abstract class BaseDbSet<T> : DbQuery<T>, IDbSet<T> where T : Entity
{
    #region IDbSet<T> Members

    public abstract T Add(T entity);
    public abstract T Attach(T entity);
    public abstract TDerivedEntity Create<TDerivedEntity>() where TDerivedEntity : class, T;
    public abstract T Create();
    public abstract T Find(params object[] keyValues);
    public abstract ObservableCollection<T> Local { get; }
    public abstract T Remove(T entity);

    #endregion
}

I'm getting the following error:

Error 1 The type 'System.Data.Entity.Infrastructure.DbQuery' has no constructors defined @path\BaseDbSet.cs

If I try to add a constructor I get:

Error 1 The type 'System.Data.Entity.Infrastructure.DbQuery' has no constructors defined @path\BaseDbSet.cs

score 2 · Accepted Answer · edited May 23 '17 at 12:20

2

That is because the constructors are declared as internal. Hence you can not access them.

Unit testing EF code is a flawed concept. Check this answer. You are wasting valuable time on unnecessary abstractions.

edited May 23 '17 at 12:20

Community

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answered Feb 12 '12 at 02:06

Eranga

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How do I create an abstract class from DbQuery and IDbSet on EntityFramework

1 Answers1