public void GetNumberOfProblem()
{
var members = _session.List <Member>(2).Get();
_conn.Collection <Member>(CollectionNames.Member).InsertBatch(members);
var generatedProblems = _session.List <Problem>(20)
.Random(10)
.Impose(x => x.UserId, members[0].Id)
.Next(10)
.Impose(x => x.UserId, members[1].Id)
.All().Get();
_problemCollection.InsertBatch(generatedProblems);
var count = _problemRepository.Count();
Assert.That(count, Is.EqualTo(20));
}