public void IntAverageTest()
{
var avg = Session.Query.All <Invoice>().Average(o => o.InvoiceId);
var expected = Invoices.Average(o => o.InvoiceId);
if (Domain.Configuration.ConnectionInfo.Provider == WellKnown.Provider.Firebird)
{
expected = Math.Truncate(expected);
}
Assert.AreEqual(expected, avg);
}