以下是我的功能
public async Task<IEnumerable<Books>> GetAsync(Guid customerId) {
var BookList= await _bookStore.FindBy(AnExpression(customerId)).ToListAsync();
return vehicleList;
}
我试图模拟_bookStore.FindBy()方法,该方法返回IQueryable
var Books= new List<Books>(2){
new Books(),
new Books()
}.AsQueryable();
mock.Expect(viewStore => viewStore.FindBy(Arg<Expression<Func<Books, bool>>>.Is.Anything)).Return(Books);
viewStore
是一个接口:public interface IRepository<T> : IDisposable where T : class
{
IQueryable<T> FindBy(Expression<Func<T, bool>> predicate);
}
我收到以下错误
System.InvalidOperationException:源IQueryable没有实现IDbAsyncEnumerable。仅实现IDbAsyncEnumerable的源可用于Entity Framework异步操作
我试过像https://msdn.microsoft.com/en-us/data/dn314429#async这样实现AsyncQueryProvider
但是实现是通过Moq而不是Rhino模拟显示的。
最佳答案
您必须使用在您提供的链接中实现的TestDbAsyncEnumerable
。
更换:
var Books= new List<Books>(2){
new Books(),
new Books()
}.AsQueryable();
mock.Expect(viewStore => viewStore.FindBy(Arg<Expression<Func<Books, bool>>>.Is.Anything))
.Return(Books);
与:
var Books = new List<Books>(2){
new Books(),
new Books()
}.AsQueryable();
var asycEnumarable = new TestDbAsyncEnumerable<Books>(Books);
var viewStore = MockRepository.GenerateStub<IRepository<Books>>();
viewStore.Stub(x => x.FindBy(Arg<Expression<Func<Books, bool>>>.Is.Anything))
.Return(asycEnumarable);