public void LinqExploratoryTestWhichProvesNothing()
{
{
var i1001 = new MyRef1 {
Id = 1001, I1 = null, I2 = 101
};
var i1101 = new MyRef1 {
Id = 1101, I1 = null, I2 = 111
};
var i1002 = new MyRef1 {
Id = 1002, I1 = 12, I2 = 102
};
var i1003 = new MyRef1 {
Id = 1003, I1 = 13, I2 = 103
};
var ref1s = new[] { i1001, i1101, i1002, i1003 };
var someRef1s = from r in ref1s
orderby(r.Id == 1101 || r.Id == 1102?r.Id - 1000 : r.Id)
select(r.Id == 1101 || r.Id == 1102 ? r.Id + 1000 : r.Id);
CollectionAssert.AreEqual(new[] { 2101, 1001, 1002, 1003 }, someRef1s.ToList());
}
{
var j2001 = new MyRef2 {
Id = 2001, J1 = null, J2 = 201
};
var j2002 = new MyRef2 {
Id = 2002, J1 = 22, J2 = 202
};
var i1001 = new MyRef1 {
Id = 1001, I1 = null, I2 = 101, BO2 = j2001
};
var i1002 = new MyRef1 {
Id = 1002, I1 = 12, I2 = 102, BO2 = null
};
var b10 = new MyBO {
Id = 10, Name = "1:1001,o1:NULL,2:NULL", BO1 = i1001, OtherBO1 = null, BO2 = null
};
var b20 = new MyBO {
Id = 20, Name = "1:1002,o1:NULL,2:2002", BO1 = i1002, OtherBO1 = null, BO2 = j2002
};
var bos = new[] { b10 };
//var someBos = from r in bos
// where r.BO1.BO2.J2 == 201
// select r;
//CollectionAssert.AreEqual(new[] { b10 }, someBos.ToList());
var someBos1 = from r in bos
where (r.BO1.BO2 == null ? r.BO2 : r.BO1.BO2).J2 == 201
select r.Id;
Assert.That(() => someBos1.ToList(), Is.EquivalentTo(new[] { b10.Id }));
}
}
private async Task <MyRef1> GetOrCreateBO1Async(ISession s, CancellationToken cancellationToken = default(CancellationToken))
{
if (BO1 == null)
{
BO1 = new MyRef1();
await(s.SaveAsync(BO1, cancellationToken));
}
return(BO1);
}
private MyRef1 GetOrCreateBO1(ISession s)
{
if (BO1 == null)
{
BO1 = new MyRef1();
s.Save(BO1);
}
return(BO1);
}
/// <summary>
/// This setup is used in most tests in here - but not all; and we might want to
/// twist it for special tests. Therefore, the OnSetUp mechanism is not used.
/// </summary>
/// <param name="cancellationToken">A cancellation token that can be used to cancel the work</param>
private async Task StandardSetUpAsync(CancellationToken cancellationToken = default(CancellationToken))
{
using (var session = OpenSession())
{
using (var tx = session.BeginTransaction())
{
var i1001 = new MyRef1 {
Id = 1001, I1 = null, I2 = 101
};
var i1101 = new MyRef1 {
Id = 1101, I1 = null, I2 = 111
};
var i1002 = new MyRef1 {
Id = 1002, I1 = 12, I2 = 102
};
var i1003 = new MyRef1 {
Id = 1003, I1 = 13, I2 = 103
};
await(session.SaveAsync(i1001, cancellationToken));
await(session.SaveAsync(i1101, cancellationToken));
await(session.SaveAsync(i1002, cancellationToken));
await(session.SaveAsync(i1003, cancellationToken));
var j2001 = new MyRef2 {
Id = 2001, J1 = null, J2 = 201
};
var j2002 = new MyRef2 {
Id = 2002, J1 = 22, J2 = 202
};
var j2003 = new MyRef2 {
Id = 2003, J1 = null, J2 = 203
};
await(session.SaveAsync(j2001, cancellationToken));
await(session.SaveAsync(j2002, cancellationToken));
await(session.SaveAsync(j2003, cancellationToken));
var b10 = new MyBO {
Id = 10, Name = "1:1001,o1:NULL,2:NULL", BO1 = i1001, OtherBO1 = null, BO2 = null
};
var b11 = new MyBO {
Id = 11, Name = "1:1001,o1:1101,2:NULL", BO1 = i1001, OtherBO1 = i1101, BO2 = null
};
var b20 = new MyBO {
Id = 20, Name = "1:1002,o1:NULL,2:2002", BO1 = i1002, OtherBO1 = null, BO2 = j2002
};
var b30 = new MyBO {
Id = 30, Name = "1:NULL,o1:NULL,2:2003", BO1 = null, OtherBO1 = null, BO2 = j2003
};
await(session.SaveAsync(b10, cancellationToken));
await(session.SaveAsync(b11, cancellationToken));
await(session.SaveAsync(b20, cancellationToken));
await(session.SaveAsync(b30, cancellationToken));
await(tx.CommitAsync(cancellationToken));
}
}
}
/// <summary>
/// This setup is used in most tests in here - but not all; and we might want to
/// twist it for special tests. Therefore, the OnSetUp mechanism is not used.
/// </summary>
private void StandardSetUp()
{
using (var session = OpenSession())
{
using (var tx = session.BeginTransaction())
{
var i1001 = new MyRef1 {
Id = 1001, I1 = null, I2 = 101
};
var i1101 = new MyRef1 {
Id = 1101, I1 = null, I2 = 111
};
var i1002 = new MyRef1 {
Id = 1002, I1 = 12, I2 = 102
};
var i1003 = new MyRef1 {
Id = 1003, I1 = 13, I2 = 103
};
session.Save(i1001);
session.Save(i1101);
session.Save(i1002);
session.Save(i1003);
var j2001 = new MyRef2 {
Id = 2001, J1 = null, J2 = 201
};
var j2002 = new MyRef2 {
Id = 2002, J1 = 22, J2 = 202
};
var j2003 = new MyRef2 {
Id = 2003, J1 = null, J2 = 203
};
session.Save(j2001);
session.Save(j2002);
session.Save(j2003);
var b10 = new MyBO {
Id = 10, Name = "1:1001,o1:NULL,2:NULL", BO1 = i1001, OtherBO1 = null, BO2 = null
};
var b11 = new MyBO {
Id = 11, Name = "1:1001,o1:1101,2:NULL", BO1 = i1001, OtherBO1 = i1101, BO2 = null
};
var b20 = new MyBO {
Id = 20, Name = "1:1002,o1:NULL,2:2002", BO1 = i1002, OtherBO1 = null, BO2 = j2002
};
var b30 = new MyBO {
Id = 30, Name = "1:NULL,o1:NULL,2:2003", BO1 = null, OtherBO1 = null, BO2 = j2003
};
session.Save(b10);
session.Save(b11);
session.Save(b20);
session.Save(b30);
tx.Commit();
}
}
}
public async Task ProjectionDoesNotChangeResultAsync()
{
// This tests against the "projection anomaly" of (||-4) semantics.
using (var session = OpenSession())
{
using (var tx = session.BeginTransaction())
{
var i1001 = new MyRef1 {
Id = 1001, I1 = null, I2 = 101
};
var i1101 = new MyRef1 {
Id = 1101, I1 = null, I2 = 111
};
await(session.SaveAsync(i1001));
await(session.SaveAsync(i1101));
var b1 = new MyBO {
Id = 1, Name = "1:1001", BO1 = i1001
};
var b2 = new MyBO {
Id = 2, Name = "2:1101", BO1 = i1101
};
var b3 = new MyBO {
Id = 3, Name = "3:1101", BO1 = i1101
};
var b4 = new MyBO {
Id = 4, Name = "4:NULL", BO1 = null
};
await(session.SaveAsync(b1));
await(session.SaveAsync(b2));
await(session.SaveAsync(b3));
await(session.SaveAsync(b4));
await(tx.CommitAsync());
}
}
using (var session = OpenSession())
{
var directResult = (await(session.Query <MyRef1>()
.Where(bo => bo.I1 == null).ToListAsync())).Select(bo => bo.Id);
var resultViaProjection = (await((from bo in session.Query <MyBO>()
where bo.BO1.I1 == null || bo.BO2.J2 == 999
select bo.BO1).Distinct().ToListAsync())).Select(bo => bo.Id);
// With "projection anomaly", the previous Select will fail, as one "bo" is null,
// and hence bo.Id throws a NRE.
Assert.That(() => resultViaProjection.ToList(), Is.EquivalentTo(directResult.ToList()));
}
}
private MyRef1 GetOrCreateBO1(ISession s)
{
if (BO1 == null)
{
BO1 = new MyRef1();
s.Save(BO1);
}
return BO1;
}
