Add test case from patch in https://nhibernate.jira.com/browse/NH-2204

Author: oskarb

src/NHibernate.Test/NHSpecificTest/NH2204/Fixture.cs

@@ -0,0 +1,3 @@
+using System;using System.Data;using NUnit.Framework;using NHibernate.Dialect;namespace NHibernate.Test.NHSpecificTest.NH2204{	[TestFixture]	public class Fixture : BugTestCase	{		public override string BugNumber		{			get { return "NH2204"; }		}		protected override bool AppliesTo(Dialect.Dialect dialect)		{			return dialect is PostgreSQL81Dialect;		}		// create the trigger		protected override void OnSetUp()		{			using (ISession s = OpenSession())			{				IDbCommand command = s.Connection.CreateCommand();				command.CommandText = "CREATE OR REPLACE FUNCTION audit_parent() RETURNS trigger AS $audit_parent$" +				                      Environment.NewLine +				                      "BEGIN" + Environment.NewLine +
+									  "INSERT INTO parent_history SELECT nextval('parent_history_histid_seq'), now(), NEW.*;" +				                      Environment.NewLine +				                      "RETURN NEW;" + Environment.NewLine +				                      "END" + Environment.NewLine +				                      " $audit_parent$ LANGUAGE 'plpgsql';";				command.ExecuteNonQuery();				command.CommandText = "CREATE TRIGGER parent_audit" + Environment.NewLine +				                      "AFTER INSERT OR UPDATE ON parent" + Environment.NewLine +				                      "FOR EACH ROW EXECUTE PROCEDURE audit_parent();";				command.ExecuteNonQuery();			}		}		// remove trigger and remove data from tables		protected override void OnTearDown()		{			using (ISession s = OpenSession())			{				IDbCommand command = s.Connection.CreateCommand();				command.CommandText = "DROP FUNCTION audit_parent() CASCADE;";				command.ExecuteNonQuery();
+				command.CommandText = "DELETE from parent_history;";				command.ExecuteNonQuery();				command.CommandText = "DELETE from parent;";				command.ExecuteNonQuery();			}		}		[Test]		public void KnownFailure_Correct_Id_Returned_When_Using_Trigger()		{			Assert.Throws<AssertionException>(() => RunTest(), "We expected this test to fail - if the problem has been fixed, clean-up the test.");		}		private void RunTest()		{			var entity1 = new Parent {Name = "Parent1_0"}; // when saved this entity should have the id of 1			var entity2 = new Parent {Name = "Parent2_0"}; // when saved this entity should have the id of 2			var entity3 = new Parent {Name = "Parent3_0"}; // when saved this entity should have the id of 3			using (ISession s = OpenSession())			{				// save first entity				s.Save(entity1);				s.Flush();				Assert.AreEqual(1, entity1.Id);				// save second entity				s.Save(entity2);				s.Flush();				Assert.AreEqual(2, entity2.Id);				// update this entity 10 times - adds entries to the audit table 				// causing the sequences for the parent and history table to no longer be aligned				for (int i = 1; i < 11; i++)				{					entity2.Name = string.Format("Parent2_{0}", i);					s.Update(entity2);					s.Flush();				}				// save third entity				s.Save(entity3);				s.Flush();				Assert.AreEqual(					3,					entity3.Id,					"oh uh - it would appear that lastval() is not our friend when a trigger updates other sequences.");				// now would be a good time to look at the data in the tables and see that they have the IDs as expected				// which are not the same as those returned by nhibernate			}		}	}}

src/NHibernate.Test/NHSpecificTest/NH2204/Mappings.hbm.xml

@@ -0,0 +1 @@
+<?xml version="1.0" encoding="utf-8"?><hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"                   assembly="NHibernate.Test"                   namespace="NHibernate.Test.NHSpecificTest.NH2204">  <class name="Parent">    <id name="Id">      <generator class="native" />    </id>    <property name="Name" />  </class>  <class name="ParentHistory" table="parent_history">    <id name="HistId">      <generator class="native" />    </id>    <property name="HistWhen" />    <property name="Id" />    <property name="Name" />  </class></hibernate-mapping>

src/NHibernate.Test/NHSpecificTest/NH2204/Model.cs

@@ -0,0 +1 @@
+using System;namespace NHibernate.Test.NHSpecificTest.NH2204{	public class Parent	{		public virtual int Id { get; set; }		public virtual string Name { get; set; }	}	public class ParentHistory	{		public virtual int HistId { get; set; }		public virtual DateTime HistWhen { get; set; }		public virtual int Id { get; set; }		public virtual string Name { get; set; }	}}

src/NHibernate.Test/NHibernate.Test.csproj

@@ -731,6 +731,8 @@
     <Compile Include="NHSpecificTest\EntityWithUserTypeCanHaveLinqGenerators\Fixture.cs" />
     <Compile Include="NHSpecificTest\EntityWithUserTypeCanHaveLinqGenerators\FooExample.cs" />
     <Compile Include="NHSpecificTest\EntityWithUserTypeCanHaveLinqGenerators\IExample.cs" />
+    <Compile Include="NHSpecificTest\NH2204\Model.cs" />
+    <Compile Include="NHSpecificTest\NH2204\Fixture.cs" />
     <Compile Include="NHSpecificTest\NH3414\Entity.cs" />
     <Compile Include="NHSpecificTest\NH3414\FixtureByCode.cs" />
     <Compile Include="NHSpecificTest\NH2218\Fixture.cs" />
@@ -3184,6 +3186,7 @@
     <EmbeddedResource Include="NHSpecificTest\NH1291AnonExample\Mappings.hbm.xml" />
   </ItemGroup>
   <ItemGroup>
+    <EmbeddedResource Include="NHSpecificTest\NH2204\Mappings.hbm.xml" />
     <EmbeddedResource Include="NHSpecificTest\NH3874\Mappings.hbm.xml" />
     <EmbeddedResource Include="NHSpecificTest\EntityWithUserTypeCanHaveLinqGenerators\Mappings.hbm.xml" />
     <EmbeddedResource Include="NHSpecificTest\NH2218\Mappings.hbm.xml" />