I blocked in below step

```
var ids = _repository.GetIQueryable<Customers>().Where(lrt => lrt.IsActive == true &&
                       lrt.NextRoleId == defaultRoleSetting.RoleId &&
                       lrt.NextUserId == null).Select(x => x.MasterId).Distinct().Take(100).ToHashSet();

```

I tried this but I don't find the right Returns syntax

```
_mockRepository.Setup(s => s.GetIQueryable<Customers>()).Returns<List<int>>(ids =>
{
  return ????;
});

```