public async Task SumAsync_Int32_WithSelector()
{
EntityMapping.RegisterType(typeof(QueryableAsyncSumModel));
var connection = TestConfiguration.GetConnection();
var context = new MongoDbContext(connection);
var provider = new MongoFrameworkQueryProvider <QueryableAsyncSumModel>(connection);
var queryable = new MongoFrameworkQueryable <QueryableAsyncSumModel>(provider);
context.ChangeTracker.SetEntityState(new QueryableAsyncSumModel {
Title = "SumAsync_Int32_WithSelector.1", Int32Number = 7
}, EntityEntryState.Added);
context.ChangeTracker.SetEntityState(new QueryableAsyncSumModel {
Title = "SumAsync_Int32_WithSelector.2", Int32Number = 5
}, EntityEntryState.Added);
context.SaveChanges();
var result = await queryable.SumAsync(e => e.Int32Number);
Assert.AreEqual(12, result);
}