- Makes MySQL reject inserting UUID 0

- Makes SQLite mimick MySQL default behavior on first
  and last name already on db: it does not insert the
  new record.
- Added tests for UUID 0 and for new UUID with existing
  first and last name.

OpenSim/Data/MySQL/MySQLUserData.cs

@@ -582,6 +582,11 @@ namespace OpenSim.Data.MySQL
         /// <param name="user">The user profile to create</param>
         public override void AddNewUserProfile(UserProfileData user)
         {
+            UUID zero = UUID.Zero;
+            if (user.ID == zero)
+            {
+                return;   
+            }
             MySQLSuperManager dbm = GetLockedConnection();
 
             try

OpenSim/Data/SQLite/SQLiteUserData.cs

@@ -481,6 +481,37 @@ namespace OpenSim.Data.SQLite
 
         }
 
+        private bool ExistsFirstLastName(String fname, String lname)
+        {
+            string FindUser = "select * from users where (username=:username and surname=:surname)";
+            using (SqliteCommand cmd = new SqliteCommand(FindUser, g_conn))
+            {
+                cmd.Parameters.Add(new SqliteParameter(":username", fname));
+                cmd.Parameters.Add(new SqliteParameter(":surname", lname));
+                try
+                {
+                    using (IDataReader reader = cmd.ExecuteReader())
+                    {
+                        if(reader.Read())
+                        {
+                            reader.Close();
+                            return true;
+                        }
+                        else
+                        {
+                            reader.Close();
+                            return false;
+                        }
+                    }
+                }
+                catch (Exception ex)
+                {
+                    m_log.Error("[USER DB]: Exception searching for user's first and last name: " + ex.ToString());
+                    return false;
+                }
+            }
+        }
+
         /// <summary>
         /// Creates a new user profile
         /// </summary>
@@ -488,6 +519,10 @@ namespace OpenSim.Data.SQLite
         override public void AddNewUserProfile(UserProfileData user)
         {
             DataTable users = ds.Tables["users"];
+            UUID zero = UUID.Zero;
+            if (ExistsFirstLastName(user.FirstName, user.SurName) || user.ID == zero)
+                return;
+            
             lock (ds)
             {
                 DataRow row = users.Rows.Find(Util.ToRawUuidString(user.ID));

OpenSim/Data/Tests/BasicUserTest.cs

@@ -45,6 +45,7 @@ namespace OpenSim.Data.Tests
         public UUID user1;
         public UUID user2;
         public UUID user3;
+        public UUID user4;
         public UUID webkey;
         public UUID zero = UUID.Zero;
         public Random random;
@@ -55,6 +56,8 @@ namespace OpenSim.Data.Tests
         
         public UUID region1;
         
+        public string fname0;
+        public string lname0;
         public string fname1;
         public string lname1;
         public string fname2;
@@ -76,11 +79,14 @@ namespace OpenSim.Data.Tests
             user1 = UUID.Random();
             user2 = UUID.Random();
             user3 = UUID.Random();
+            user4 = UUID.Random();
             agent1 = UUID.Random();
             agent2 = UUID.Random();
             agent3 = UUID.Random();
             webkey = UUID.Random();
             region1 = UUID.Random();
+            fname0 = RandomName(random);
+            lname0 = RandomName(random);
             fname1 = RandomName(random);
             lname1 = RandomName(random);
             fname2 = RandomName(random);
@@ -115,19 +121,16 @@ namespace OpenSim.Data.Tests
         [Test]
         public void T010_CreateUser()
         {
-            UserProfileData u1 = NewUser(user1,fname1,lname1); // Must first and last names be unique?
-            //UserProfileData u0 = NewUser(zero,fname1,lname1); // Zero causes some weird behaviors
+            UserProfileData u1 = NewUser(user1,fname1,lname1); 
             UserProfileData u2 = NewUser(user2,fname2,lname2);
             UserProfileData u3 = NewUser(user3,fname3,lname3);
-            //db.AddNewUserProfile(u0);
+            Console.WriteLine("Users are {0} {1} {2}",user1,user2,user3);
             db.AddNewUserProfile(u1);
             db.AddNewUserProfile(u2);
             db.AddNewUserProfile(u3);
-            //UserProfileData u1z = db.GetUserByUUID(zero);
             UserProfileData u1a = db.GetUserByUUID(user1);
             UserProfileData u2a = db.GetUserByUUID(user2);
             UserProfileData u3a = db.GetUserByUUID(user3);
-            //Assert.That(zero,Is.EqualTo(u1z.ID));
             Assert.That(user1,Is.EqualTo(u1a.ID));
             Assert.That(user2,Is.EqualTo(u2a.ID));
             Assert.That(user3,Is.EqualTo(u3a.ID));
@@ -165,6 +168,17 @@ namespace OpenSim.Data.Tests
             Assert.That(u1.WebLoginKey,Is.EqualTo(webkey));
         }
         
+        [Test]
+        public void T014_ExpectedNullReferenceReturns()
+        {
+            UserProfileData u0 = NewUser(zero,fname0,lname0); 
+            UserProfileData u4 = NewUser(user4,fname2,lname2);
+            db.AddNewUserProfile(u0);
+            db.AddNewUserProfile(u4);
+            Assert.That(db.GetUserByUUID(zero),Is.Null);
+            Assert.That(db.GetUserByUUID(user4),Is.Null);
+        }        
+
         [Test]
         public void T020_CreateAgent()
         {