Question

I have the following generic method:

public bool Any<TEntity>(Expression<Func<TEntity, bool>> whereCondition) where TEntity : class
{
    bool result = false;
    ObjectQuery<TEntity> query = CreateObjectSet<TEntity>();

    var queryResult = query.Where(whereCondition);

    if(queryResult.Count() > 0)
        result = true;

    return result;
}

Using Moq, I mocked an instance of the class where this method resides.
Now I’d like to mock the return result of this method:

var mock = new Mock<ITestRepository>();
mock.Setup(foo => foo.Single<MyObject>(It.IsAny<Expression>)).Returns(new MyObject());

What am I missing with this?

Answer 1

I don’t know if you’ve already been able to solve this, but you’re passing the wrong type parameter to It.IsAny<>.

Your call to Setup should actually be:

mock.Setup(foo => foo.Single(It.IsAny<Expression<Func<MyObject, bool>>>()))
    .Returns(new MyObject());